JPS5672124A - Manufacture of case hardening steel - Google Patents

Manufacture of case hardening steel

Info

Publication number
JPS5672124A
JPS5672124A JP14770579A JP14770579A JPS5672124A JP S5672124 A JPS5672124 A JP S5672124A JP 14770579 A JP14770579 A JP 14770579A JP 14770579 A JP14770579 A JP 14770579A JP S5672124 A JPS5672124 A JP S5672124A
Authority
JP
Japan
Prior art keywords
temperature
hot rolling
case hardening
hardening steel
manufacture
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
JP14770579A
Other languages
Japanese (ja)
Other versions
JPS6041687B2 (en
Inventor
Katsunori Takada
Mitsuyasu Nakakura
Masakatsu Yokoyama
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel Co Ltd
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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP14770579A priority Critical patent/JPS6041687B2/en
Publication of JPS5672124A publication Critical patent/JPS5672124A/en
Publication of JPS6041687B2 publication Critical patent/JPS6041687B2/en
Expired legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To obtain a case hardening steel for machine structure which does not require any annealing treatment and has an uniform quality, by executing a hot rolling at a special final finishing temperature after the blank is heated to a specified tempeature, and by reducing the temperature to 600°C at a prescribed cooling rate.
CONSTITUTION: After the temperature of blank is raised to 950W1,100°C, a hot rolling process is performed at ≥800°C final finishing temperature, and then the temperature is lowered to 600°C at ≤200°C/min cooling rate. Thus a case hardening steel having a uniform quality, in which no abnormal structure is formed, is obtained. Moreover, when in the course of said hot rolling, the hot rolling process is performed so that the reduction area in a temperature range from 800°C to 920°C becomes ≤50%, said effect can be increased remarkably.
COPYRIGHT: (C)1981,JPO&Japio
JP14770579A 1979-11-16 1979-11-16 Manufacturing method of case hardened steel Expired JPS6041687B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14770579A JPS6041687B2 (en) 1979-11-16 1979-11-16 Manufacturing method of case hardened steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14770579A JPS6041687B2 (en) 1979-11-16 1979-11-16 Manufacturing method of case hardened steel

Publications (2)

Publication Number Publication Date
JPS5672124A true JPS5672124A (en) 1981-06-16
JPS6041687B2 JPS6041687B2 (en) 1985-09-18

Family

ID=15436366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14770579A Expired JPS6041687B2 (en) 1979-11-16 1979-11-16 Manufacturing method of case hardened steel

Country Status (1)

Country Link
JP (1) JPS6041687B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261429A (en) * 1985-05-15 1986-11-19 Daido Steel Co Ltd Production of carburizing steel
JPS6223929A (en) * 1985-07-22 1987-01-31 Daido Steel Co Ltd Manufacture of steel for cold forging
JPH05163525A (en) * 1991-12-09 1993-06-29 Sanyo Special Steel Co Ltd Manufacture of crystal grain stabilized case hardened steel of fine structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261429A (en) * 1985-05-15 1986-11-19 Daido Steel Co Ltd Production of carburizing steel
JPS6223929A (en) * 1985-07-22 1987-01-31 Daido Steel Co Ltd Manufacture of steel for cold forging
JPH05163525A (en) * 1991-12-09 1993-06-29 Sanyo Special Steel Co Ltd Manufacture of crystal grain stabilized case hardened steel of fine structure

Also Published As

Publication number Publication date
JPS6041687B2 (en) 1985-09-18

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