JPS55119119A - Hardening method for steel at low temperature - Google Patents

Hardening method for steel at low temperature

Info

Publication number
JPS55119119A
JPS55119119A JP1452279A JP1452279A JPS55119119A JP S55119119 A JPS55119119 A JP S55119119A JP 1452279 A JP1452279 A JP 1452279A JP 1452279 A JP1452279 A JP 1452279A JP S55119119 A JPS55119119 A JP S55119119A
Authority
JP
Japan
Prior art keywords
steel
gas
nitrogen
ammonia
outer layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1452279A
Other languages
Japanese (ja)
Other versions
JPS572770B2 (en
Inventor
Atsushi Takeuchi
Umimori Yamazumi
Takao Ishihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nachi Fujikoshi Corp
Original Assignee
Nachi Fujikoshi Corp
Fujikoshi KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nachi Fujikoshi Corp, Fujikoshi KK filed Critical Nachi Fujikoshi Corp
Priority to JP1452279A priority Critical patent/JPS55119119A/en
Publication of JPS55119119A publication Critical patent/JPS55119119A/en
Priority to US06/246,049 priority patent/US4366008A/en
Publication of JPS572770B2 publication Critical patent/JPS572770B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE: To form a thick hardening layer on the outer layer at a low temperature without producing distortion at an inner phase by a method wherein steel is heated in an atmosphere manufactured by adding a specified petroleum gas, an organic liquid, a neutral gas, etc. to ammonia, nitrogen is permeated, and the steel is quenched.
CONSTITUTION: Steel is heated in an atmosphere, which is manufactured by adding a petroleum gas such as propane, butane, etc. or the denatured endothermic gas or a gas or a liquid with cementation properties, which is an organic liquid such as alcohols, esters, ketones, etc., or one kind or more of a neutral gas such as nitrogen, argon, etc. to only ammonia gas or ammonia gas, within a range of 100°C or less from a A1 transformation point or less while controlling the supply of the ammonia gas. Thus, nitrogen is permeated on a surface of the steel, the outer layer is changed into austenite, and the inside is held as it remains as it is ferrite. The steel is quenched, an austenite layer is turned into martensite, and only the outer layer is hardened. Deformation is halted at a minimum because transformation is inhibited in the inside.
COPYRIGHT: (C)1980,JPO&Japio
JP1452279A 1979-02-09 1979-02-09 Hardening method for steel at low temperature Granted JPS55119119A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1452279A JPS55119119A (en) 1979-02-09 1979-02-09 Hardening method for steel at low temperature
US06/246,049 US4366008A (en) 1979-02-09 1981-03-20 Method for hardening steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1452279A JPS55119119A (en) 1979-02-09 1979-02-09 Hardening method for steel at low temperature

Publications (2)

Publication Number Publication Date
JPS55119119A true JPS55119119A (en) 1980-09-12
JPS572770B2 JPS572770B2 (en) 1982-01-18

Family

ID=11863426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1452279A Granted JPS55119119A (en) 1979-02-09 1979-02-09 Hardening method for steel at low temperature

Country Status (1)

Country Link
JP (1) JPS55119119A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729574A (en) * 1980-05-02 1982-02-17 Boc Ltd Austenite cementation nitration for iron metals
JPS61194169A (en) * 1985-02-20 1986-08-28 ルーカス　インダストリイズ　パブリツク　リミテツド　カンパニー Production of steel parts
US7578750B2 (en) * 2007-03-29 2009-08-25 Nhk Spring Co., Ltd. Golf shaft, golf club, and production method for golf shaft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104451095B (en) * 2014-12-02 2016-08-17 湖南科技大学 A kind of heat treatment method of the expanding cone of 7CrSiMnMoV

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130441A (en) * 1976-04-27 1977-11-01 Aisin Seiki Heat surface treatment of products formed of steel sheet

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130441A (en) * 1976-04-27 1977-11-01 Aisin Seiki Heat surface treatment of products formed of steel sheet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729574A (en) * 1980-05-02 1982-02-17 Boc Ltd Austenite cementation nitration for iron metals
JPH0125823B2 (en) * 1980-05-02 1989-05-19 Bii Oo Shii Guruupu Plc Za
JPS61194169A (en) * 1985-02-20 1986-08-28 ルーカス　インダストリイズ　パブリツク　リミテツド　カンパニー Production of steel parts
US7578750B2 (en) * 2007-03-29 2009-08-25 Nhk Spring Co., Ltd. Golf shaft, golf club, and production method for golf shaft

Also Published As

Publication number Publication date
JPS572770B2 (en) 1982-01-18

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