JPS5677323A - Heat treatment method of tool steel - Google Patents

Heat treatment method of tool steel

Info

Publication number
JPS5677323A
JPS5677323A JP15467379A JP15467379A JPS5677323A JP S5677323 A JPS5677323 A JP S5677323A JP 15467379 A JP15467379 A JP 15467379A JP 15467379 A JP15467379 A JP 15467379A JP S5677323 A JPS5677323 A JP S5677323A
Authority
JP
Japan
Prior art keywords
tool steel
30min
atmosphere
furnace
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.)
Granted
Application number
JP15467379A
Other languages
Japanese (ja)
Other versions
JPS5914089B2 (en
Inventor
Masayoshi Shimizu
Takuya Echigoya
Yoshito Sone
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.)
SHIMIZU DENSETSU KOGYO KK
Kobe Steel Ltd
Original Assignee
SHIMIZU DENSETSU KOGYO KK
Kobe Steel 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 SHIMIZU DENSETSU KOGYO KK, Kobe Steel Ltd filed Critical SHIMIZU DENSETSU KOGYO KK
Priority to JP15467379A priority Critical patent/JPS5914089B2/en
Publication of JPS5677323A publication Critical patent/JPS5677323A/en
Publication of JPS5914089B2 publication Critical patent/JPS5914089B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE:To establish effective heat treatment conditions by performing preheating heating and cooling by combining atmosphere conditions and sepcific temp. and treatment time at the time of heat-treating tool steel etc. in a nonoxidative atmosphere furnace provided with a heating chamber and a cooling chamber. CONSTITUTION:Tool steel is heat-treated in an atmosphere heat treatment furnace consisting of a heating chamber 4 having electric heaters 5 and a box body 6 made of insulating materials and a cooling chamber 5 provided with a cooling fan 9. First, the inside of the heating chamber 4 is evacuated to keep the in-furnace pressure in a vacuum state of <=1 torr, and the tool steel is heated to 800-900 deg.C (Ta) within 30min (t1). After it is held for 20-30min (ta) at these temperatures, the temp. is raised to 1,000-1,100 deg.C (Tb) in 5-10min (t2), and these temperatures are maintained for 20-30min (tb), whereby the tool steel is preheated. Next, the in-furnace atmosphere is substituted with an N2 gas or inert gas atmosphere at pressure of about 300 torr, after which the temperature is raised to 1,200-1,300 deg.C (Tc) in 5-10min (t3) and the tool steel is subjected to regular heating for 10-30min (tc), after which it is put into the cooling chamber 5, where it is cooled down to 600 deg.C within 2min, thereafter it is cooled down to around 150 deg.C within 30min (t4), thence it is taken out from the cooling chamber 5 and is cooled down to ordinary temp.
JP15467379A 1979-11-28 1979-11-28 Tool steel heat treatment method Expired JPS5914089B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15467379A JPS5914089B2 (en) 1979-11-28 1979-11-28 Tool steel heat treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15467379A JPS5914089B2 (en) 1979-11-28 1979-11-28 Tool steel heat treatment method

Publications (2)

Publication Number Publication Date
JPS5677323A true JPS5677323A (en) 1981-06-25
JPS5914089B2 JPS5914089B2 (en) 1984-04-03

Family

ID=15589394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15467379A Expired JPS5914089B2 (en) 1979-11-28 1979-11-28 Tool steel heat treatment method

Country Status (1)

Country Link
JP (1) JPS5914089B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103060538A (en) * 2011-10-19 2013-04-24 昆山鑫昌泰模具科技有限公司 Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters
CN106119475A (en) * 2016-08-30 2016-11-16 芜湖三联锻造有限公司 A kind of large-scale high alloy mould special thermal treatment technique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103060538A (en) * 2011-10-19 2013-04-24 昆山鑫昌泰模具科技有限公司 Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters
CN103060538B (en) * 2011-10-19 2014-11-26 昆山鑫昌泰模具科技有限公司 Setting method in sections of high alloy steel vacuum heat treatment high-temperature region parameters
CN106119475A (en) * 2016-08-30 2016-11-16 芜湖三联锻造有限公司 A kind of large-scale high alloy mould special thermal treatment technique

Also Published As

Publication number Publication date
JPS5914089B2 (en) 1984-04-03

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