ClassID:

118985

C21D6/02 - CPC Classification

Classification description:

Heat treatment of ferrous alloys Hardening by precipitation

Recent Application in this class:
#1
20250257422
2025-08-14

MATERIAL FOR HOT STAMPING AND METHOD OF MANUFACTURING THE SAME

#2
20240376561
2024-11-14

PRECIPITATION HARDENING MARTENSITIC STAINLESS STEEL HAVING EXCELLENT WELDABILITY, AND METHOD FOR PRODUCING THE SAME

#3
20240287662
2024-08-29

PRECIPITATION HARDENING TYPE SOFT MAGNETIC FERRITIC STAINLESS STEEL HAVING EXCELLENT MACHINABILITY

#4
20240254581
2024-08-01

HETEROSTRUCTURED ANTIMICROBIAL STAINLESS STEEL AND METHOD FOR SYNTHESIZING THE SAME

#5
20230272499
2023-08-31

PROCESS FOR MANUFACTURING HIGH STRENGTH STEEL

#6
20230272496
2023-08-31

AUSTENITIC STAINLESS CAST STEEL AND METHOD FOR PRODUCING AUSTENITIC STAINLESS CAST STEEL

#7
20230265538
2023-08-24

MATERIAL FOR HOT STAMPING AND METHOD OF MANUFACTURING THE SAME

#8
20230227932
2023-07-20

Material for hot stamping and method of manufacturing the same

#9
20230193437
2023-06-22

STAINLESS STEEL

#10
20230142397
2023-05-11

Secondary cooling control method for reinforcing surface solidification structure of microalloyed steel continuous casting bloom

#11
20220195547
2022-06-23

Optimized gamma-prime strengthened austenitic trip steel and designing methods of same

#12
20220090229
2022-03-24

Austenitic stainless steel containing niobium and manufacturing method of the same

#13
20220080534
2022-03-17

Welding filler wire for fusion welding precipitation-hardened austenitic Fe—Mn—Al—C alloys

#14
20220056545
2022-02-24

STEEL, PRODUCT MADE OF SAID STEEL, AND MANUFACTURING METHOD THEREOF

#15
20220025475
2022-01-27

IMPACT AND WEAR RESISTANT COMPONENT, AND METHOD FOR PRODUCING THE SAME

#16
20210348248
2021-11-11

Austenitic stainless steel containing niobium and manufacturing method of the same

#17
20210340641
2021-11-04

HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME

#18
20210262074
2021-08-26

MULTI NANO-PRECIPITATE STRENGTHENED AUSTENITIC STEEL

#19
20210087660
2021-03-25

Ferritic stainless steel having excellent high-temperature oxidation resistance, and manufacturing method therefor

#20
20200391275
2020-12-17

Process of manufacturing of segments for carbon thrust bearing

#21
20200263575
2020-08-20

High performance iron-based alloys for engine valvetrain applications and methods of making and use thereof

#22
20200246877
2020-08-06

METHOD FOR PRODUCING HIGH-SPEED TOOL STEEL MATERIAL, METHOD FOR PRODUCING HIGH-SPEED TOOL STEEL PRODUCT, AND HIGH-SPEED TOOL STEEL PRODUCT

#23
20200232076
2020-07-23

Stainless steel

#24
20200157650
2020-05-21

HOT-ROLLED STEEL SHEET FOR TAILORED ROLLED BLANK AND TAILORED ROLLED BLANK

#25
20200080180
2020-03-12

Steel with high hardness and excellent toughness

#26
20200080164
2020-03-12

High strength precipitation hardening stainless steel alloy and article made therefrom

#27
20200070476
2020-03-05

Hot dip coated steel having excellent processability

#28
20200027579
2020-01-23

Iron-based composition for fuel element

#29
20190330711
2019-10-31

Hot stamped part and manufacturing method thereof

#30
20190309400
2019-10-10

Maraging steel

#31
20190284653
2019-09-19

Surface treatment process

#32
20190271052
2019-09-05

Steel sheet and method for producing the same

#33
20190256941
2019-08-22

Hot-rolled steel sheet for tailored rolled blank and tailored rolled blank

#34
20190226059
2019-07-25

Steel for a tool holder

#35
20190201972
2019-07-04

Process for making a component of a turbomachine, a component obtainable thereby and turbomachine comprising the same

#36
20190161823
2019-05-30

Steel sheet, and production method therefor

#37
20190153571
2019-05-23

Fe-based shape memory alloy material and method of producing the same

#38
20190153557
2019-05-23

Ferritic steel for turbochargers

#39
20190127815
2019-05-02

Precipitation hardening steel and its manufacture

#40
20190127814
2019-05-02

Precipitation hardening stainless steel and its manufacture

#41
20190112686
2019-04-18

Manufacturing method of mechanical component using martensitic stainless steel, rotating device, rolling bearing and rolling bearing unit

#42
20190078184
2019-03-14

Steel alloy and a tool

#43
20190062882
2019-02-28

Abrasion-resistant steel

#44
20190055860
2019-02-21

High performance iron-based alloys for engine valvetrain applications and methods of making and use thereof

#45
20190048444
2019-02-14

LOW ALLOY HIGH STRENGTH SEAMLESS STEEL PIPE FOR OIL COUNTRY TUBULAR GOODS

#46
20190048443
2019-02-14

Low alloy high strength seamless steel pipe for oil country tubular goods

#47
20190048433
2019-02-14

Low thermal expansion superalloy and manufacturing method thereof

#48
20190010584
2019-01-10

Nickel-iron-cobalt based alloys and articles and methods for forming articles including nickel-iron-cobalt based alloys

#49
20190003021
2019-01-03

Hot work tool steel

#50
20180363080
2018-12-20

High-speed tool steel, material for tools, and method for producing material for tools

#51
20180327881
2018-11-15

High-strength seamless steel pipe for oil country tubular goods and method of producing the same

#52
20180305799
2018-10-25

Prehardened steel material, mold, and mold component

#53
20180274053
2018-09-27

Dispersion strengthened austenitic stainless steel article, method for manufacturing same and product made of same

#54
20180269496
2018-09-20

Carbon separator for solid polymer fuel cell, solid polymer fuel cell, and solid polymer fuel cell stack

#55
20180259408
2018-09-13

Metal elastic element and diaphragm using the same

#56
20180251868
2018-09-06

Optimized gamma-prime strengthened austenitic trip steel and designing methods of same

#57
20180171455
2018-06-21

Precipitation strengthened metal alloy article

#58
20180155810
2018-06-07

Thick steel plate with low cracking sensitivity and low yield ratio and manufacturing method thereof

#59
20180147636
2018-05-31

Method for producing high-speed tool steel material, method for producing high-speed tool steel product, and high-speed tool steel product

#60
20180135143
2018-05-17

Martensitic stainless steel strengthened by copper-nucleated nitride precipitates

#61
20180087123
2018-03-29

Steel, product made of said steel, and manufacturing method thereof

#62
20180080098
2018-03-22

MULTI-PROCESS HARDENING METHOD

#63
20180066335
2018-03-08

Method of producing ferritic stainless steel sheet

#64
20180044767
2018-02-15

FERRITIC STAINLESS STEEL SHEET

#65
20180010397
2018-01-11

Cutting elements comprising a low-carbon steel material, related earth-boring tools, and related methods

#66
20170342520
2017-11-30

Method for heat treatment of austenitic steels and austenitic steels obtained thereby

#67
20170298485
2017-10-19

Austenitic stainless steel plate

#68
20170298484
2017-10-19

Method for producing an alloy for a reforming tube

#69
20170292515
2017-10-12

Precipitation hardened martensitic stainless steel and reciprocating pump manufactured therewith

#70
20170282236
2017-10-05

Hollow metal screw and method of making

#71
20170275716
2017-09-28

Nanocrystalline bainitic steels, shafts, gas turbine engines, and methods of manufacturing nanocrystalline bainitic steels

#72
20170260611
2017-09-14

Mold steel and mold

#73
20170233854
2017-08-17

Cold work tool steel

#74
20170148531
2017-05-25

Iron-based composition for fuel element

#75
20170121798
2017-05-04

Layered construction of in-situ metal matrix composites

#76
20170114426
2017-04-27

Components made of a steel alloy and method for producing high-strength components

#77
20170096720
2017-04-06

Part obtained from age hardening type bainitic microalloyed steel, process for producing part, and age hardening type bainitic microalloyed steel

#78
20170073785
2017-03-16

Age hardening non-heat treated bainitic steel

#79
20170044638
2017-02-16

Heat-rolled steel plate for tailored rolled blank, tailored rolled blank, and methods for producing these

#80
20160355909
2016-12-08

STAINLESS STEEL FOR A PLASTIC MOULD AND A MOULD MADE OF THE STAINLESS STEEL

#81
20160340753
2016-11-24

Maraging steel

#82
20160340752
2016-11-24

Maraging steel

#83
20160333434
2016-11-17

ENHANCED SURFACE STRUCTURE

#84
20160319391
2016-11-03

Method for producing high-strength duplex stainless steel

#85
20160312653
2016-10-27

Nanostructured ferritic alloy components and related articles

#86
20160289785
2016-10-06

Manufacturing method of mechanical component using martensitic stainless steel, rotating device, rolling bearing and rolling bearing unit

#87
20160276045
2016-09-22

IRON-BASED COMPOSITION FOR FUEL ELEMENT

#88
20160265074
2016-09-15

Precipitation hardening of tantalum coated metals

#89
20160245132
2016-08-25

Iron-based alloys and methods of making and use thereof

#90
20160237517
2016-08-18

Method for heat treatment of stainless member, and method for producing forged stainless product

#91
20160208841
2016-07-21

Hollow metal screw and method of making

#92
20160201710
2016-07-14

Hollow metal screw and method of making

#93
20160153077
2016-06-02

Austenitic light-weight high-strength steel with excellent properties of welds, and method of manufacturing the same

#94
20160138123
2016-05-19

PRECIPITATION-HARDENED STAINLESS STEEL ALLOYS

#95
20160138122
2016-05-19

PRECIPITATION HARDENING STEEL WITH IMPROVED TOUGHNESS AND METHOD

#96
20160068922
2016-03-10

Hardened titanium structure for transmission gear applications

#97
20160053353
2016-02-25

Hot-rolled ferritic stainless-steel plate, process for producing same, and steel strip

#98
20160040262
2016-02-11

Surface hardenable stainless steels

#99
20160024610
2016-01-28

High strength steel sheet excellent in delayed fracture resistance and low temperature toughness, and high strength member manufactured using the same

#100
20160017450
2016-01-21

Localized hardening of metallic surfaces

#101
20160003281
2016-01-07

Hollow metal screw and method of making

#102
20150376729
2015-12-31

Method for producing high elastic limit nonmagnetic steel material using an austenitic stainless steel sheet

#103
20150354039
2015-12-10

Fe-Ni-based alloy having excellent high-temperature characteristics and hydrogen embrittlement resistance characteristics, and method for producing the same

#104
20150354021
2015-12-10

High-strength hot-rolled steel strip or sheet with excellent formability and fatigue performance and a method of manufacturing said steel strip or sheet

#105
20150315921
2015-11-05

Precipitation hardened martensitic stainless steel, manufacturing method therefor, and turbine moving blade and steam turbine using the same

#106
20150299831
2015-10-22

Process for producing precipitation strengthening martensitic steel

#107
20150284817
2015-10-08

Martensitic stainless steel strengthened by copper-nucleated nitride precipitates

#108
20150184365
2015-07-02

Cast steel for construction equipment bucket parts and parts for construction equipment bucket comprising the same

#109
20150176100
2015-06-25

Material for high carburizing steel and method for producing a gear using the same

#110
20150167132
2015-06-18

Method for producing objects from iron—cobalt—molybdenum/tungsten—nitrogen alloys

#111
20150147589
2015-05-28

Rolled steel that hardens by means of precipitation after hot-forming and/or quenching with a tool having very high strength and ductility, and method for manufacturing same

#112
20150132144
2015-05-14

PRECIPITATION HARDENING MARTENSITIC STAINLESS STEEL, TURBINE COMPONENT FORMED OF SAID MARTENSITIC STAINLESS STEEL, AND TURBINE INCLUDING SAID TURBINE COMPONENT

#113
20150122377
2015-05-07

Steel, sheet steel product and process for producing a sheet steel product

#114
20150101714
2015-04-16

Recrystallization, refinement, and strengthening mechanisms for production of advanced high strength metal alloys

#115
20150076386
2015-03-19

Iron-based alloys and methods of making and use thereof

#116
20150075681
2015-03-19

Martensitic Stainless Steel Strengthened by Copper-Nucleated Nitride Precipitates

#117
20150053315
2015-02-26

Boron-added high strength steel for bolt and high strength bolt having excellent delayed fracture resistance

#118
20150053311
2015-02-26

Nitrided steel member and manufacturing method thereof

#119
20150044085
2015-02-12

Ferritic stainless steel sheet

#120
20150038380
2015-02-05

Gear having excellent seizing resistance

#121
20150027598
2015-01-29

CHROMIUM-NICKEL STEEL, MARTENSITIC WIRE AND METHOD FOR PRODUCTION THEREOF

#122
20150013856
2015-01-15

Method for manufacturing press-formed product and press-formed product

#123
20140182749
2014-07-03

Iron-based composition for fuel element

#124
20140020797
2014-01-23

Magnetic field annealing for improved creep resistance

#125
20140007981
2014-01-09

Precipitation hardening type martensitic stainless steel, rotor blade of steam turbine and steam turbine

#126
20130343944
2013-12-26

Material with high resistance to wear

#127
20130327446
2013-12-12

Aircraft engine shaft comprising a maraging steel having a tensile strength of 2300MPa or more

#128
20130263796
2013-10-10

High-temperature piping product and method for producing same

#129
20130186527
2013-07-25

Heat treatment for producing steel sheet with high strength and ductility

#130
20130186106
2013-07-25

Precipitation hardening martensitic stainless steel, and steam turbine long blade, steam turbine, and power plant using the same

#131
20130160905
2013-06-27

METHOD FOR PRODUCING A TEMPERED MARTENSITIC HEAT RESISTANT STEEL FOR HIGH TEMPERATURE APPLICATION

#132
20130058773
2013-03-07

Method of manufacturing material for rotary machine component, method of manufacturing rotary machine component, material for rotary machine component, rotary machine component, and centrifugal compressor

#133
20130014864
2013-01-17

Dual-phase stainless steel sheet and steel strip and method of production

#134
20120282480
2012-11-08

HIGH-TEMPERATURE MATERIAL TRANSFERRING MEMBER

#135
20120241051
2012-09-27

Precipitation hardened heat-resistant steel

#136
20120241050
2012-09-27

NITRIDING PROCESS FOR MARAGING STEEL

#137
20120237390
2012-09-20

Martensitic Stainless Steel Produced by a Twin Roll Strip Casting Process and Method for Manufacturing Same

#138
20120160373
2012-06-28

Forging heat resistant steel, manufacturing method thereof, forged parts and manufacturing method thereof

#139
20120145285
2012-06-14

METHOD FOR PRODUCING AN IRON-CHROMIUM ALLOY

#140
20120125492
2012-05-24

Ultratough high-strength weldable plate steel and its method of manufacturing thereof

#141
20120118442
2012-05-17

Stainless steel having good conductivity and ductility for use in fuel cell and method for producing the same

#142
20120114496
2012-05-10

Precipitation hardening martensitic stainless steel and steam turbine component made thereof

#143
20120031529
2012-02-09

Maraging steel strip

#144
20120027637
2012-02-02

Steel for welded structure and producing method thereof

#145
20110255988
2011-10-20

Precipitation hardenable martensitic stainless steel and steam turbine blade using the same

#146
20110253269
2011-10-20

ANTIBACTERIAL STAINLESS STEEL WIRE AND MANUFACTURING METHOD THEREOF

#147
20110236721
2011-09-29

Steel compositions, methods of forming the same, and articles formed therefrom

#148
20110217567
2011-09-08

METHOD FOR THE MANUFACTURE OF A COMPOUND PRODUCT WITH A SURFACE REGION OF A WEAR RESISTANT COATING, SUCH A PRODUCT AND THE USE OF A STEEL MATERIAL FOR OBTAINING THE COATING

#149
20110186190
2011-08-04

Thermal mechanical treatment of martensitic stainless steel

#150
20110139318
2011-06-16

Process for investment casting and casting grain for use in the process

#151
20110132503
2011-06-09

METHOD FOR REDUCING EDGE SERRATION DEFECTS IN THIN SLAB

#152
20110126945
2011-06-02

Ni-based alloy high-chrome steel structure and manufacturing method of the same

#153
20110094637
2011-04-28

Martensitic stainless steel strengthened by copper-nucleated nitride precipitates

#154
20110088819
2011-04-21

AUSTENITIC HEAT RESISTANT ALLOY, HEAT RESISTANT PRESSURE MEMBER COMPRISING THE ALLOY, AND METHOD FOR MANUFACTURING THE SAME MEMBER

#155
20110076176
2011-03-31

CAST COMPRESSOR ARTICLES AND METHODS OF FORMING SAME

#156
20110061772
2011-03-17

LOW-DENSITY HIGH-TOUGHNESS ALLOY AND THE FABRICATION METHOD THEREOF

#157
20110048583
2011-03-03

Hardened martensitic steel, method for producing a component from this steel and component obtained in this manner

#158
20110041961
2011-02-24

Hardened martensitic steel, method for producing a component from this steel and component obtained in this manner

#159
20110017365
2011-01-27

ALLOY AND METHOD FOR PRODUCING ALLOY

#160
20110000587
2011-01-06

Steel

#161
20100329884
2010-12-30

Turbine rotor blade

#162
20100319642
2010-12-23

Roller follower, valve train, induction hardening apparatus, method of heat treatment of shaft member, method of manufacturing shaft, and shaft

#163
20100316523
2010-12-16

Iron-based alloy powder

#164
20100289194
2010-11-18

Use and method of producing a dispersion strengthened steel as material in a roller for a roller hearth furnace

#165
20100258218
2010-10-14

HIGH-STRENGTH TWIP STEEL SHEET AND METHOD OF MANUFACTURING THE SAME

#166
20100258217
2010-10-14

Nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steels

#167
20100230015
2010-09-16

Lower-cost, ultra-high-strength, high-toughness steel

#168
20100200123
2010-08-12

Hardened titanium structure for transmission gear applications

#169
20100200119
2010-08-12

Hardened martensitic steel having a low or zero content of cobalt, method for producing a component from this steel, and component obtained in this manner

#170
20100193089
2010-08-05

HOT-WORKING TOOL STEEL HAVING EXCELLENT TOUGHNESS AND HIGH-TEMPERATURE STRENGTH AND METHOD FOR PRODUCTION THEREOF

#171
20100186856
2010-07-29

High strength thin cast strip product and method for making the same

#172
20100139817
2010-06-10

Martensitic stainless steel composition, method for making a mechanical part from said steel and resulting part

#173
20100124515
2010-05-20

Machine structural steel excellent in machinability and strength properties

#174
20100119638
2010-05-13

PELLETING DIE AND METHOD FOR SURFACE HARDENING PELLETING DIES

#175
20100108203
2010-05-06

Ultra-High Strength Stainless Alloy Strip, a Method of Making Same, and a Method of Using Same for Making a Golf Club Head

#176
20100089504
2010-04-15

Precipitation-hardened, martensitic, cast stainless steel having excellent machinability and its production method

#177
20100077818
2010-04-01

Ball autofrettage

#178
20100074792
2010-03-25

COLD WORK DIE STEEL, DIE, AND METHOD FOR PRODUCTION OF COLD WORK DIE STEEL

#179
20100065159
2010-03-18

Method for producing and assembling superheater tubes of steam generators

#180
20100064519
2010-03-18

Method for producing and assembling superheater tubes of steam generators

#181
20100051143
2010-03-04

Case Hardening Steel Tube Having Improved Workability and a Process for its Manufacture

#182
20100037994
2010-02-18

METHOD OF PROCESSING MARAGING STEEL

#183
20100018615
2010-01-28

Thermal mechanical treatment of ferrous alloys, and related alloys and articles

#184
20100003159
2010-01-07

Low-density high-toughness alloy and the fabrication method thereof

#185
20090274573
2009-11-05

Machine Structural Steel Excellent in Machinability and Strength Properties

#186
20090257906
2009-10-15

Cobalt-rich wear resistant alloy and method of making and use thereof

#187
20090246550
2009-10-01

Tube

#188
20090229714
2009-09-17

METHOD OF MITIGATING STRESS CORROSION CRACKING IN AUSTENITIC SOLID SOLUTION STRENGTHENED STAINLESS STEELS

#189
20090199930
2009-08-13

Secondary-hardening gear steel

#190
20090148337
2009-06-11

Method of manufacturing Ni-based superalloy component for gas turbine using one-step process of hot isostatic pressing and heat treatment and component manufactured thereby

#191
20090110588
2009-04-30

Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same

#192
20090092513
2009-04-09

Ferritic stainless steel sheet superior in heat resistance

#193
20090056839
2009-03-05

Method for Improving Residual Stress of Structure Member

#194
20090047167
2009-02-19

Iron-nickel alloy

#195
20080308198
2008-12-18

Austenitic stainless steel, manufacturing method for the same, and structure using the same

#196
20080277030
2008-11-13

Composition and Process for Enhanced Properties of Ferrous Components

#197
20080251165
2008-10-16

Heat treatment system for a composite turbine engine component

#198
20080229893
2008-09-25

Tools with a thermo-mechanically modified working region and methods of forming such tools

#199
20080193321
2008-08-14

Hardened martensitic steel, method for producing a component from this steel and component obtained in this manner

#200
20080105341
2008-05-08

HEAT TREATMENT OF INLAID PRESSURE VESSELS

#201
20080105340
2008-05-08

Heat Treatment Method of Inlaid Pressure Vessels

#202
20080078479
2008-04-03

Determining constitutive models for fracture prediction in ductile materials undergoing plastic deformation

#203
20070289679
2007-12-20

High Strength Cold Rolled Steel Sheet Having Excellent Shape Freezability, and Method for Manufacturing the Same

#204
20070251609
2007-11-01

Ultratough high-strength weldable plate steel and method of manufacture thereof

#205
20070209738
2007-09-13

High strength and high toughness alloy with low density and the method of making

#206
20070137050
2007-06-21

Razor blades and compositions and processes for the production of razor blades

#207
20070111023
2007-05-17

Steel compositions, methods of forming the same, and articles formed therefrom

#208
20070000580
2007-01-04

Martensitic stainless steel and method of the manufacture

#209
20060201593
2006-09-14

Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same

#210
20060172069
2006-08-03

Thermal process for wheels

#211
20060128496
2006-06-15

Maraging steel golf club head

#212
20060118215
2006-06-08

Precipitation hardened martensitic stainless steel, manufacturing method therefor, and turbine moving blade and steam turbine using the same

#213
20060081309
2006-04-20

Ultra-high strength weathering steel and method for making same

#214
20060021682
2006-02-02

Ultratough high-strength weldable plate steel

#215
20050098244
2005-05-12

Method for manufacturing metallic bellows

#216
20050083480
2005-04-21

Spectacle frame