ClassID:

119101

C21D9/505 - CPC Classification

Classification description:

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints Cooling thereof

Recent Application in this class:
#1
20250250649
2025-08-07

BAINITIC WELDING AND COMPONENT

#2
20250206375
2025-06-26

METHOD FOR PRODUCING A WELDED STEEL BLANK AND ASSOCIATED WELDED BLANK

#3
20240316640
2024-09-26

IMPROVED METHOD FOR PRODUCING A COMPONENT BY MEANS OF ADDITIVE MANUFACTURING

#4
20240116141
2024-04-11

Hot-Formed Previously Welded Steel Part with very High Mechanical Resistance and Production Method

#5
20230399051
2023-12-14

Method for producing a welded steel blank and associated welded blank

#6
20230183831
2023-06-15

Multi-thickness welded vehicle structure

#7
20230050317
2023-02-16

Production method for a spot welded joint using high strength and high forming steel

#8
20220364198
2022-11-17

Steel sheet, member, and methods for producing the same

#9
20220347797
2022-11-03

Hot-Formed Previously Welded Steel Part with very High Mechanical Resistance and Production Method

#10
20220228233
2022-07-21

RESISTANCE SPOT WELD, RESISTANCE SPOT WELDING METHOD, RESISTANCE SPOT WELDED JOINT, AND METHOD FOR MANUFACTURING RESISTANCE SPOT WELDED JOINT

#11
20220119912
2022-04-21

Method for optimizing microstructure of rail welded joint

#12
20220098699
2022-03-31

SUPER DUPLEX STAINLESS STEEL CLAD STEEL PLATE AND MANUFACTURING METHOD THEREFOR

#13
20220090224
2022-03-24

Hot-rolled steel sheet and weld joint, and methods for producing same

#14
20220002835
2022-01-06

Dual pass, dual anneal welding method for joining high strength steels

#15
20210404032
2021-12-30

Method of manufacturing Martensitic steel and a Martensitic steel thereof

#16
20210404031
2021-12-30

Steel material having low yield ratio and excellent heat affected zone toughness and manufacturing method therefor

#17
20210310091
2021-10-07

Electric resistance welded steel pipe or tube

#18
20210285069
2021-09-16

A STEEL FOR GRADE R6 OFFSHORE MOORING CHAIN WITH HIGH STRENGTH AND HIGH TOUGHNESS AND ITS CHAIN USE IN ANCHORING AND MOORING FLOATING BODIES WITH CATHODIC PROTECTION

#19
20210238706
2021-08-05

Process for manufacturing a bimetallic part using a dilation-causing thermal treatment

#20
20210229206
2021-07-29

Welded advanced high strength steel

#21
20210156002
2021-05-27

CONNECTION BETWEEN FORKS AND HANGERS ON FORKS

#22
20210107095
2021-04-15

Method for producing a precoated steel sheet and associated sheet

#23
20210101225
2021-04-08

WELD JOINT MANUFACTURING METHOD AND WELD JOINT

#24
20210095358
2021-04-01

ACTIVELY BRAZED JOINT AND METHOD OF PROCESSING

#25
20200370187
2020-11-26

METHOD OF MAKING A SHEET-METAL PART

#26
20200353983
2020-11-12

Method for producing a welded steel blank and associated welded blank

#27
20200299794
2020-09-24

Apparatus and methods for heating and quenching tubular members

#28
20200181730
2020-06-11

Homogenization process for coiled tubing

#29
20200165693
2020-05-28

Method for Producing a Wear-Resistant Steel Pipe, Wear-Resistant Steel Pipe, and Use of Such a Steel Pipe

#30
20190360064
2019-11-28

HIGH PERFORMANCE MATERIAL FOR COILED TUBING APPLICATIONS AND THE METHOD OF PRODUCING THE SAME

#31
20190360063
2019-11-28

High performance material for coiled tubing applications and the method of producing the same

#32
20190276908
2019-09-12

Wellbore tubular air quenching

#33
20190193187
2019-06-27

Spot welded joint using high strength and high forming steel and its production method

#34
20190134734
2019-05-09

Welding apparatus and welding method

#35
20190105731
2019-04-11

HOT FORMED BONDING IN SHEET METAL PANELS

#36
20190084074
2019-03-21

Weldability improvements in advanced high strength steel

#37
20180281104
2018-10-04

Friction stir welding apparatus, friction stir welding control device, and friction stir welding method

#38
20180223384
2018-08-09

High performance material for coiled tubing applications and the method of producing the same

#39
20180105893
2018-04-19

High strength electric resistance welded steel pipe and method for producing high strength electric resistance welded steel pipe

#40
20180051353
2018-02-22

HIGH PERFORMANCE MATERIAL FOR COILED TUBING APPLICATIONS AND THE METHOD OF PRODUCING THE SAME

#41
20180044756
2018-02-15

Tooling for stress relieving a turbine wheel and shaft

#42
20180030562
2018-02-01

HEAT TREATMENT OF STEEL PARTS, PARTICULARLY FRICTION-WELDED STEEL PARTS

#43
20170341187
2017-11-30

Hot-formed previously welded steel part with very high mechanical resistance and production method

#44
20170335421
2017-11-23

High performance material for coiled tubing applications and the method of producing the same

#45
20170304952
2017-10-26

Hot-formed previously welded steel part with very high mechanical resistance and production method

#46
20170298470
2017-10-19

Method of production of brazed joint and such a brazed joint

#47
20170275727
2017-09-28

Thick steel plate having good multipass weld joint CTOD characteristics and method for manufacturing the same

#48
20160355902
2016-12-08

WELDING METHOD AND SYSTEM

#49
20160348206
2016-12-01

METHOD FOR RESTORING THE STRUCTURE OF A STEEL COMPONENT AFTER HEATING AND STEEL COMPONENT OBTAINED BY THE METHOD

#50
20160305194
2016-10-20

Heat treated heavy weight drill pipe

#51
20160298206
2016-10-13

Wellbore tubular air quenching

#52
20160230241
2016-08-11

Electric resistance welded steel pipe for oil well

#53
20160221117
2016-08-04

Friction stir welding method for steel sheets and method of manufacturing joint

#54
20160193687
2016-07-07

RESISTANCE WELDING METHOD FOR SUCKER ROD

#55
20160167157
2016-06-16

Spot welded joint using high strength and high forming steel and its production method

#56
20160153063
2016-06-02

Heavy wall electric resistance welded steel pipe for line pipe and method for manufacturing the same

#57
20160144456
2016-05-26

Method of manufacturing tailor welded blanks

#58
20160076315
2016-03-17

Method for manufacturing superior 13Cr friction-welded drillrod

#59
20150368733
2015-12-24

Method for repairing break of universal connecting rod of universal coupling

#60
20150247214
2015-09-03

Steel plate having yield strength of 670 to 870 N/mmand tensile strength of 780 to 940 N/mm

#61
20150203933
2015-07-23

High-strength electric-resistance-welded steel pipe of excellent long-term softening resistance in intermediate temperature ranges

#62
20150101713
2015-04-16

Method and apparatus for treating a steel article

#63
20150096548
2015-04-09

Chisels

#64
20150084333
2015-03-26

METHOD FOR WELDING TWO EDGES OF ONE OR MORE STEEL PARTS TO EACH OTHER INCLUDING A HEAT TREATMENT STEP AFTER THE WELDING STEP: PENSTOCK OBTAINED WITH SUCH A METHOD

#65
20150030382
2015-01-29

Hot-formed previously welded steel part with very high mechanical resistance and production method

#66
20150020928
2015-01-22

Austenitic steel having excellent machinability and ultra-low temperature toughness in weld heat-affected zone, and method of manufacturing the same

#67
20140366995
2014-12-18

Method for post-weld heat treatment of welded components made of gamma prime strengthened superalloys

#68
20140332504
2014-11-13

Weld bead shaping apparatus and weld bead shaping method

#69
20140272448
2014-09-18

High performance material for coiled tubing applications and the method of producing the same

#70
20140238559
2014-08-28

Pre-weld heat treatment for a nickel based superalloy

#71
20140101938
2014-04-17

Method of working a gas turbine engine airfoil

#72
20130092279
2013-04-18

COILED TUBING WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE

#73
20120301238
2012-11-29

Chisels

#74
20120217227
2012-08-30

METHOD OF INTRODUCING COMPRESSIVE STRESS IN A WELDED JOINT

#75
20120118426
2012-05-17

COILED TUBING WITH IMPROVED FATIGUE RESISTANCE AND METHOD OF MANUFACTURE

#76
20120107644
2012-05-03

Localized Induction Heating For Residual Stress Optimization

#77
20120073708
2012-03-29

Method of shaping and hardening a sheet steel blank

#78
20120037279
2012-02-16

Structural material

#79
20120015212
2012-01-19

Method of cooling rail weld zone, and rail weld joint

#80
20120012296
2012-01-19

Device and method for cooling rail weld zone

#81
20110248071
2011-10-13

Austenitic welding material, and preventive maintenance method for stress corrosion cracking and preventive maintenance method for intergranular corrosion, using same

#82
20100140230
2010-06-10

METHOD FOR THE MANUFACTURE OF A WELDED ROTOR FOR A GAS-TURBINE ENGINE

#83
20100003535
2010-01-07

High strength thick welded steel pipe for line pipe superior in low temperature toughness and method of production of the same

#84
20090183804
2009-07-23

Localized induction heating for residual stress optimization

#85
20090120535
2009-05-14

METHOD OF BONDING STEEL MEMBERS, METHOD OF ENHANCING BONDING STRENGTH OF UNITED BODY FORMED OF STEEL MEMBERS, STEEL PRODUCT, AND DIE-CAST PRODUCT

#86
20090065494
2009-03-12

Systems and methods for providing localized heat treatment of gas turbine components

#87
20080203139
2008-08-28

Method for controlling weld metal microstructure using localized controlled cooling of seam-welded joints

#88
20080115863
2008-05-22

Method for improving the performance of seam-welded joints using post-weld heat treatment

#89
20080093419
2008-04-24

Method For Connecting Switch Parts Made of Austenitic Manganese Steel Casting, or Austenitic Manganese Steel Rails, With a Rail of Carbon Steel

#90
20080028605
2008-02-07

Weld repair of metallic components

#91
20070042310
2007-02-22

Method and apparatus for the treatment of a component

#92
20060151440
2006-07-13

Method for arc welding of ductile cast iron

#93
20050257861
2005-11-24

Dual seam-welded air hardenable steel tubing and structural members

#94
20050224562
2005-10-13

Apparatus and method for forming a weld joint having improved physical properties