JPS6447811A - Method and furnace for vacuum heat treatment - Google Patents

Method and furnace for vacuum heat treatment

Info

Publication number
JPS6447811A
JPS6447811A JP20393987A JP20393987A JPS6447811A JP S6447811 A JPS6447811 A JP S6447811A JP 20393987 A JP20393987 A JP 20393987A JP 20393987 A JP20393987 A JP 20393987A JP S6447811 A JPS6447811 A JP S6447811A
Authority
JP
Japan
Prior art keywords
metal material
vacuum
chamber
gas
cooling
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.)
Pending
Application number
JP20393987A
Other languages
Japanese (ja)
Inventor
Hiroya Mukai
Kenji Kawate
Takeshi Shimada
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
Tokyo Electric Power Company Holdings Inc
Original Assignee
Daido Steel Co Ltd
Tokyo Electric Power Co Inc
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, Tokyo Electric Power Co Inc filed Critical Daido Steel Co Ltd
Priority to JP20393987A priority Critical patent/JPS6447811A/en
Publication of JPS6447811A publication Critical patent/JPS6447811A/en
Pending legal-status Critical Current

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  • Furnace Details (AREA)

Abstract

PURPOSE:To easily apply martempering and austempering to a metal material by rapidly cooling the vacuum-heated metal material to a specific temp. under a non-oxidizing atmosphere, soaking and further, executing gas cooling. CONSTITUTION:Inner part of a closed system vessel 12 is made to vacuum atmosphere by a vacuum pump 15 and the metal material A is vacuum-heated in the vacuum heating chamber 21 to the prescribed temp. Next, the pressure in the closed system vessel 12 is returned back under non-oxidizing atmosphere, and the metal material A is shifted on a table of lifting device 48 in a gas cooling chamber 31 and descended to the fluid bed chamber 41. Then, the fluidized gas is sent to a plenum chamber 46 through a control value 51 and by injecting from a dispersing plate 45, the fluid grain 47 is fluidized and the metal material A is uniformly rapid-cooled under good heat efficiency to come to the prescribed temp. at more than the martenstic point and soaked as it is. Next, the metal material A is ascended to the gas cooling chamber 31 by the lifting device 48 and the cooling gas is sent through a control valve 53 and finish-cooled. By this method, the product having excellent surface characteristic is obtd. without is obtd. without any troublesome after-treatment.
JP20393987A 1987-08-17 1987-08-17 Method and furnace for vacuum heat treatment Pending JPS6447811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20393987A JPS6447811A (en) 1987-08-17 1987-08-17 Method and furnace for vacuum heat treatment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20393987A JPS6447811A (en) 1987-08-17 1987-08-17 Method and furnace for vacuum heat treatment

Publications (1)

Publication Number Publication Date
JPS6447811A true JPS6447811A (en) 1989-02-22

Family

ID=16482184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20393987A Pending JPS6447811A (en) 1987-08-17 1987-08-17 Method and furnace for vacuum heat treatment

Country Status (1)

Country Link
JP (1) JPS6447811A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100339848B1 (en) * 2000-01-12 2002-06-07 이광래 Heat treatment equipment of austemper spheroidal graphite cast iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100339848B1 (en) * 2000-01-12 2002-06-07 이광래 Heat treatment equipment of austemper spheroidal graphite cast iron

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