ClassID:

118913

C21D1/02 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation

Recent Application in this class:
#1
20260043115
2026-02-12

Steel sheet having excellent corrosion properties after press hardening and method for manufacturing the same

#2
20250283202
2025-09-11

Coated steel sheet and high strength press hardened steel part and method of manufacturing the same

#3
20250277282
2025-09-04

Method for Producing Conventionally Hot-Rolled Profiled Strip Products

#4
20250188582
2025-06-12

Iron-Based Heat and Corrosion Resistant Alloy With Enhanced Air Quenchability

#5
20240309481
2024-09-19

HOT-ROLLED STEEL PLATE FOR LOW-COST HIGH TEMPERATURE ENAMELING, AND MANUFACTURING METHOD THEEFOR

#6
20240002993
2024-01-04

Coated steel sheet and high strength press hardened steel part and method of manufacturing the same

#7
20230276895
2023-09-07

Strain-Hardened Safety Toe For Footwear

#8
20230151472
2023-05-18

STEEL NEAR-NET-SHAPE MATERIAL AND METHOD FOR PRODUCING SAME

#9
20230143965
2023-05-11

ALLOY MATERIAL AND METHOD FOR PRODUCING SAME

#10
20230027056
2023-01-26

Steel wire rod having excellent spheroidizing heat treatment properties and method of manufacturing same

#11
20220267870
2022-08-25

Method for producing rail

#12
20220145414
2022-05-12

Method for Producing Conventionally Hot-Rolled Profiled Strip Products

#13
20220119902
2022-04-21

Hot-rolled steel sheet

#14
20220090228
2022-03-24

HOT-ROLLED STEEL SHEET

#15
20220072592
2022-03-10

CORROSION-RESISTANT MARINE COMPOSITE STEEL PLATE AND MANUFACTURING METHOD THEREFOR

#16
20220056547
2022-02-24

Ferritic stainless steel sheet and method of producing same, and al or al alloy coated stainless steel sheet

#17
20210108279
2021-04-15

Ultrahigh-strength ultrahigh-toughness and low-density dual-phase lamellar steel plate and preparation method therefor

#18
20210053099
2021-02-25

Method for manufacturing cold-forged, extruded aluminum alloy tube

#19
20200024679
2020-01-23

HOT ROLLED STEEL SHEET, STEEL FORGED PART AND PRODUCTION METHOD THEREFOR

#20
20190136354
2019-05-09

Non-heat treated steel for induction hardening

#21
20180371587
2018-12-27

Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor

#22
20180363091
2018-12-20

Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor

#23
20180327873
2018-11-15

Engineering Steel with a Bainitic Structure, Forged Parts Produced Therefrom and Method for Producing a Forged Part

#24
20180207695
2018-07-26

Method for manufacturing a component of austenitic TWIP or TRIP/TWIP steel

#25
20180044908
2018-02-15

COLD-FORMED STEEL SUPPORT WALL AND METHOD OF INSTALLATION

#26
20170349987
2017-12-07

High-strength steel with yield strength of 800 MPa and production method therefor

#27
20170292175
2017-10-12

Two-phase alloy, product using said two-phase alloy, and method for producing said product

#28
20170022580
2017-01-26

HIGH-STRENGTH SPRING STEEL

#29
20170009316
2017-01-12

High-strength hot-rolled steel sheet and method for manufacturing the same

#30
20160001338
2016-01-07

Process and apparatus for producing profiles from metal

#31
20150376727
2015-12-31

METHOD FOR THE MANUFACTURING OF ELEMENTS OF NON-FERROUS METAL ALLOYS, ADVANTAGEOUSLY ALUMINIUM ALLOYS

#32
20150122103
2015-05-07

Method for producing cutting blades

#33
20150036960
2015-02-05

Method for producing a track element of a bearing assembly

#34
20150017058
2015-01-15

Metal wire and electric wire

#35
20140373351
2014-12-25

Process for producing forged product

#36
20140261921
2014-09-18

Process to improve fatigue strength of micro alloy steels, forged parts made from the process and an apparatus to execute the process

#37
20140245865
2014-09-04

Cutting members for shaving razors

#38
20140182751
2014-07-03

Heat treatment method of turnout track and the turnout track

#39
20140007394
2014-01-09

Method and compression apparatus for introducing residual compression into a component having a regular or an irregular shaped surface

#40
20120288397
2012-11-15

BAINITIC STEEL FOR MOULDS

#41
20120285585
2012-11-15

HIGH-STRENGTH SPRING STEEL

#42
20120107632
2012-05-03

Method for producing a component from an air-hardenable steel and component produced therewith

#43
20110232354
2011-09-29

Method and apparatus for producing hardened formed parts

#44
20100308612
2010-12-09

Axle from a seamless tube for railroad vehicles, and a process for manufacturing an axle from a seamless steel tube for railroad vehicles

#45
20100243110
2010-09-30

Weldable steel of high strength and high toughness, and method of producing members using the same

#46
20100186857
2010-07-29

INTERNAL HIGH HARDNESS TYPE PEARLITIC RAIL WITH EXCELLENT WEAR RESISTANCE, ROLLING CONTACT FATIGUE RESISTANCE, AND DELAYED FRACTURE PROPERTY AND METHOD FOR PRODUCING SAME

#47
20100170319
2010-07-08

METHOD FOR PRESS HARDENING OF METALS

#48
20100024929
2010-02-04

Method for the thermomechanical treatment of seamless rings produced on radial-axial ring rolling machines

#49
20090189436
2009-07-30

Bearing device for wheel

#50
20090106980
2009-04-30

Process for producing bearing device for wheel

#51
20090101249
2009-04-23

Method of making a hardened sheet metal part

#52
20090065108
2009-03-12

Integrated Reformer and Batch Annealing Processes and Apparatus Therefor

#53
20080308199
2008-12-18

Method and device for the technique of cold microforging any freely formed 3-D surfaces

#54
20080264530
2008-10-30

Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same

#55
20080202640
2008-08-28

Manufacturing method of rocker arm bearing apparatus

#56
20080095657
2008-04-24

Optimization Of Steel Metallurgy To Improve Broach Tool Life

#57
20070234576
2007-10-11

Cutting members for shaving razors

#58
20070175548
2007-08-02

Method and installation for the production of hot-rolled strip having a dual-phase structure

#59
20060185774
2006-08-24

Hot forming method and a hot formed member

#60
20060102257
2006-05-18

Steel composition and parts forged by a forging die

#61
20060005595
2006-01-12

Clutch housing and method for manufacturing the same