ClassID:

118986

C21D6/04 - CPC Classification

Classification description:

Heat treatment of ferrous alloys Hardening by cooling below 0 degrees Celsius

Recent Application in this class:
#1
20260097431
2026-04-09

MARAGING STEEL, METHOD FOR PREPARING MARAGING STEEL, AND ELECTRONIC DEVICE

#2
20250215541
2025-07-03

SOFT MAGNETIC IRON ALLOY SHEET, METHOD OF MANUFACTURING SOFT MAGNETIC IRON ALLOY SHEET, AND IRON CORE AND ROTATING ELECTRIC MACHINE INCLUDING SOFT MAGNETIC IRON ALLOY SHEET

#3
20240279764
2024-08-22

MARTENSITIC STAINLESS STEEL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR

#4
20240271239
2024-08-15

PROCESS FOR OBTAINING A FINE-GRAINED MARTENSITIC STRUCTURE COMPONENT

#5
20240258001
2024-08-01

NANOCRYSTALLINE SOFT MAGNETIC ALLOY WITH HIGH MAGNETIC INDUCTION AND HIGH FREQUENCY AND PREPARATION METHOD THEREOF

#6
20240209468
2024-06-27

MARTENSITIC STAINLESS STEEL MATERIAL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR

#7
20240194383
2024-06-13

Soft Magnetic Iron Alloy Plate, Method for Manufacturing Soft Magnetic Iron Alloy Plate, and Iron Core and Rotating Electric Machine Employing Soft Magnetic Iron Alloy Plate

#8
20230392220
2023-12-07

METHOD AND APPARATUS UTILIZING MULTIPLE FORCES TO CREATE INCREASED TENSILE STRENGTH, INCREASED STRUCTURAL COHERENCE, AND REDUCED CORROSION OF METALLICS

#9
20230323499
2023-10-12

HIGHLY CORROSION-RESISTANT STAINLESS STEEL MEMBER AND METHOD FOR MANUFACTURING SAME, HEAT TREATMENT METHOD FOR STAINLESS STEEL MEMBER, AND ROLLING BEARING AND METHOD FOR MANUFACTURING SAME

#10
20230148368
2023-05-11

LOW THERMAL EXPANSION CAST STEEL AND METHOD OF PRODUCING SAME

#11
20230107193
2023-04-06

HIGHLY ANTICORROSIVE MARTENSITIC STAINLESS STEEL, AND MANUFACTURING METHOD THEREFOR

#12
20220290268
2022-09-15

CASE-HARDENED STEEL PART FOR USE IN AERONAUTICS

#13
20220275989
2022-09-01

Deep Cryogenic Treatment Chamber for Industrial Applications

#14
20210387260
2021-12-16

Method for finishing a workpiece made by additive manufacturing

#15
20210277496
2021-09-09

Cryogenic workbench, cryogenic laser peening experiment system and control method therefor

#16
20210277491
2021-09-09

CRYOGENIC LASER SHOCK STRENGTHENING METHOD AND APPARATUS BASED ON LASER-INDUCED HIGH TEMPERATURE PLASMA TECHNOLOGY

#17
20210108297
2021-04-15

Duplex stainless steel and manufacturing method thereof

#18
20200140970
2020-05-07

AN APPARTUS AND A METHOD FOR PROCESSING STAINLESS STEEL AND AN IMPROVED STAINLESS STEEL FOR BIOIMPLANTS THEREOF

#19
20200063247
2020-02-27

Quench and temper corrosion resistant steel alloy and method for producing the alloy

#20
20200063231
2020-02-27

MARTENSITICALLY HARDENABLE STEEL AND USE THEREOF, IN PARTICULAR FOR PRODUCING A SCREW

#21
20190203312
2019-07-04

Method for producing a shaped component from a medium-manganese flat steel product and such a component

#22
20190112686
2019-04-18

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

#23
20190112680
2019-04-18

METHOD OF TREATING A STEEL

#24
20190055622
2019-02-21

Austenitic, low-density, high-strength steel strip or sheet having a high ductility, method for producing said steel and use thereof

#25
20180363105
2018-12-20

Method Of Manufacturing A Ferrous Alloy Article Using Powder Metallurgy Processing

#26
20180355464
2018-12-13

Steel Article Having Improved Contact Fatigue Resistance

#27
20180104738
2018-04-19

Method for manufacturing a golf club head

#28
20180051751
2018-02-22

Manufacturing method of precision machine tool bearing with high precision stability

#29
20170321292
2017-11-09

COLD TREATMENT FOR IMPROVING THE LOAD-BEARING CAPACITY OF METALLIC COMPONENTS

#30
20170314088
2017-11-02

Zinc-coated hot formed steel component with tailored property

#31
20170275743
2017-09-28

Method for manufacturing martensite-based precipitation strengthening stainless steel

#32
20170130285
2017-05-11

METHOD FOR PROCESSING A METAL COMPONENT

#33
20170002447
2017-01-05

Quench and temper corrosion resistant steel alloy

#34
20160362770
2016-12-15

Steel strip for cutlery

#35
20160340753
2016-11-24

Maraging steel

#36
20160340752
2016-11-24

Maraging steel

#37
20160289785
2016-10-06

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

#38
20160265074
2016-09-15

Precipitation hardening of tantalum coated metals

#39
20160122839
2016-05-05

Method for producing components from lightweight steel

#40
20150267274
2015-09-24

Method for increasing ballistic resistant performance of ultra high hard steel alloys

#41
20150211104
2015-07-30

Steel article having improved contact fatigue resistance and a method of making

#42
20150118095
2015-04-30

Method of manufacturing a ferrous alloy article using powder metallurgy processing

#43
20150034216
2015-02-05

Method of producing a nano-twinned titanium material by casting

#44
20150027598
2015-01-29

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

#45
20140158258
2014-06-12

Ni-added steel plate and method of manufacturing the same

#46
20130327446
2013-12-12

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

#47
20130098514
2013-04-25

Ni-added steel plate and method of manufacturing the same

#48
20120168039
2012-07-05

Cryogenic treatment of martensitic steel with mixed hardening

#49
20120014635
2012-01-19

Mechanical component and rolling bearing

#50
20120014626
2012-01-19

Martensitic-steel casting material and process for producing martensitic cast steel product

#51
20120000579
2012-01-05

Method of making ultra-high strength stainless steels

#52
20110243488
2011-10-06

Bearing constituent member and process for producing the same, and rolling bearing having bearing constituent member

#53
20110226386
2011-09-22

Hardened martensitic steel having a low cobalt content, process for manufacturing a part from steel, and part thus obtained

#54
20110186190
2011-08-04

Thermal mechanical treatment of martensitic stainless steel

#55
20110048583
2011-03-03

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

#56
20110041961
2011-02-24

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

#57
20100319642
2010-12-23

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

#58
20100282377
2010-11-11

Methods for treating high-strength, low-alloy steel

#59
20100269961
2010-10-28

Method and apparatus for making high strength metals with a face-centered-cubic structure

#60
20100258217
2010-10-14

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

#61
20100239205
2010-09-23

Mechanical component and rolling bearing

#62
20100230015
2010-09-16

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

#63
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

#64
20100139817
2010-06-10

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

#65
20100098967
2010-04-22

Method for imprinting and erasing amorphous metal alloys

#66
20100018615
2010-01-28

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

#67
20090260298
2009-10-22

Cryogenic Treatment Systems and Processes for Grinding Wheels and Bonded Abrasive Tools

#68
20090252866
2009-10-08

METHOD OF PRODUCING GLASS FORMING MOLD

#69
20090236016
2009-09-24

METHOD FOR MANUFACTURING GLASS MOLDING DIE

#70
20090199930
2009-08-13

Secondary-hardening gear steel

#71
20090194175
2009-08-06

SHUT-OFF DEVICE AND PROCESS FOR PRODUCING A SHUT-OFF DEVICE

#72
20090170414
2009-07-02

Cryogenic treatment processes for diamond abrasive tools

#73
20090090438
2009-04-09

Method and apparatus for making high strength metals with a face-centered-cubic structure

#74
20090090436
2009-04-09

Method for brake rotor assembly and manufacture

#75
20090081068
2009-03-26

Ultra-high strength stainless steels

#76
20090056839
2009-03-05

Method for Improving Residual Stress of Structure Member

#77
20080277030
2008-11-13

Composition and Process for Enhanced Properties of Ferrous Components

#78
20080193321
2008-08-14

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

#79
20080047632
2008-02-28

Method for Thermally Treating a Component Consisting of a Fully Hardenable, Heat-Resistant Steel and a Component Consisting of Said Steel

#80
20070196039
2007-08-23

Ball bearing for pinion shaft

#81
20070127860
2007-06-07

Tapered roller bearing an automotive pinion shaft supporting apparatus utilizing same tapered roller bearing

#82
20070102074
2007-05-10

Method for heat treating cast parts produced from a light metal melt, in particular an aluminium melt

#83
20060081309
2006-04-20

Ultra-high strength weathering steel and method for making same

#84
20060032556
2006-02-16

Case-hardened stainless steel foundry alloy and methods of making the same

#85
20050269074
2005-12-08

Case hardened stainless steel oilfield tool

#86
20050211347
2005-09-29

Method for maunfacturing an ultra-high-tensile, stretch formed or stretch bent sheet metal product of steel

#87
20050077089
2005-04-14

Cryogenically treated drilling and mining equipment