WO1996014441A3 - Thermal hardening of hard alloys and implementation in tools - Google Patents

Thermal hardening of hard alloys and implementation in tools Download PDF

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Publication number
WO1996014441A3
WO1996014441A3 PCT/UA1994/000028 UA9400028W WO9614441A3 WO 1996014441 A3 WO1996014441 A3 WO 1996014441A3 UA 9400028 W UA9400028 W UA 9400028W WO 9614441 A3 WO9614441 A3 WO 9614441A3
Authority
WO
WIPO (PCT)
Prior art keywords
article
hard alloy
rate
temperature
hardened
Prior art date
Application number
PCT/UA1994/000028
Other languages
French (fr)
Other versions
WO1996014441A2 (en
Inventor
Arkadi A Mikhailov
Victor I Trefilov
Sergei A Firstov
Original Assignee
I N Frantsevich Inst For Probl
Arkadi A Mikhailov
Victor I Trefilov
Sergei A Firstov
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 I N Frantsevich Inst For Probl, Arkadi A Mikhailov, Victor I Trefilov, Sergei A Firstov filed Critical I N Frantsevich Inst For Probl
Priority to PCT/UA1994/000028 priority Critical patent/WO1996014441A2/en
Priority to AU38223/95A priority patent/AU3822395A/en
Publication of WO1996014441A2 publication Critical patent/WO1996014441A2/en
Publication of WO1996014441A3 publication Critical patent/WO1996014441A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/10—Alloys containing non-metals
    • C22C1/1036—Alloys containing non-metals starting from a melt

Abstract

A method for thermally processing a sintered hard alloy to produce a hardened article which comprises heating a sintered hard alloy to a temperature of between about 700 and 850 °C at a first rate which avoids thermal shock; further heating the hard alloy to a maximum temperature of between about 1050 and 1350 °C at a second rate which is faster than the first rate; reducing the temperature of the hard alloy to between about 850 to 950 °C as soon as possible after the maximum temperature is achieved in order to substantially avoid the growth of carbide grains, said reducing being conducted at a third rate; and cooling the heard alloy to ambient temperature at a fourth rate that is slower than the third rate to obtain a hardened article. A further method of making an integral cast body containing a sintered hard alloy article which comprises sintering a hard alloy to form an article; brazing the article to an extension; placing said article and extension into a mold; and casting a body of a castable metal about said article and extension under conditions that provide thermal processing according to the method outlined above to form an integrally cast body about a portion of a hardened hard alloy article.
PCT/UA1994/000028 1994-10-28 1994-10-28 Thermal hardening of hard alloys and implementation in tools WO1996014441A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/UA1994/000028 WO1996014441A2 (en) 1994-10-28 1994-10-28 Thermal hardening of hard alloys and implementation in tools
AU38223/95A AU3822395A (en) 1994-10-28 1994-10-28 Thermal hardening of hard alloys and implementation in tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/UA1994/000028 WO1996014441A2 (en) 1994-10-28 1994-10-28 Thermal hardening of hard alloys and implementation in tools

Publications (2)

Publication Number Publication Date
WO1996014441A2 WO1996014441A2 (en) 1996-05-17
WO1996014441A3 true WO1996014441A3 (en) 1996-08-01

Family

ID=21688695

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/UA1994/000028 WO1996014441A2 (en) 1994-10-28 1994-10-28 Thermal hardening of hard alloys and implementation in tools

Country Status (2)

Country Link
AU (1) AU3822395A (en)
WO (1) WO1996014441A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096033A (en) * 1981-04-03 1982-10-13 Mannesmann Ag Composite casting of hot forming tool
EP0138155A2 (en) * 1983-10-07 1985-04-24 Kawasaki Jukogyo Kabushiki Kaisha Rock bit cone and method of manufacturing the same
US4556424A (en) * 1983-10-13 1985-12-03 Reed Rock Bit Company Cermets having transformation-toughening properties and method of heat-treating to improve such properties
SU1238890A1 (en) * 1984-07-06 1986-06-23 Проектно-Конструкторский Технологический Институт Всесоюзного Промышленного Объединения "Союзуглемаш" Method of heat treatment of sintered hard alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096033A (en) * 1981-04-03 1982-10-13 Mannesmann Ag Composite casting of hot forming tool
EP0138155A2 (en) * 1983-10-07 1985-04-24 Kawasaki Jukogyo Kabushiki Kaisha Rock bit cone and method of manufacturing the same
US4556424A (en) * 1983-10-13 1985-12-03 Reed Rock Bit Company Cermets having transformation-toughening properties and method of heat-treating to improve such properties
SU1238890A1 (en) * 1984-07-06 1986-06-23 Проектно-Конструкторский Технологический Институт Всесоюзного Промышленного Объединения "Союзуглемаш" Method of heat treatment of sintered hard alloy

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8706, Derwent World Patents Index; Class M29, AN 87-041906, XP002002371 *
YU. N. IVASHCHENKO ET AL: "EFFECT OF HEAT TREATMENT ON THE FAILURE MECHANISM OF T15K6 HARD ALLOY", SOVIET MATERIALS SCIENCE, vol. 21, no. 1, 1985, pages 538 - 541, XP000568361 *

Also Published As

Publication number Publication date
AU3822395A (en) 1996-05-31
WO1996014441A2 (en) 1996-05-17

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