JPS5633474A - Surface hardening method for cast titanium alloy - Google Patents

Surface hardening method for cast titanium alloy

Info

Publication number
JPS5633474A
JPS5633474A JP10808579A JP10808579A JPS5633474A JP S5633474 A JPS5633474 A JP S5633474A JP 10808579 A JP10808579 A JP 10808579A JP 10808579 A JP10808579 A JP 10808579A JP S5633474 A JPS5633474 A JP S5633474A
Authority
JP
Japan
Prior art keywords
temp
cast
alloy
surface hardening
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
JP10808579A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ibaraki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP10808579A priority Critical patent/JPS5633474A/en
Publication of JPS5633474A publication Critical patent/JPS5633474A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Nonferrous Metals Or Alloys (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

PURPOSE:To make the material characteristics of the core part of a cast Ti alloy close to those of a cast material and carry out surface hardening at the same time by repeatedly heating and cooling the alloy in predetermined temp. ranges in a nitriding atmosphere followed by forced cooling. CONSTITUTION:A cast Ti alloy is repeatedly heated and cooled 2-10 times in an N2 or N2 and H2 atmosphere whose oxygen partial pressure has been kept as low as possible while adjusting the temp. range of the lower temp. side to ordinary temp.- 600 deg.C and that of the higher temp. side to 850-1,000 deg.C. After the repeated heating and cooling the alloy is forced to be cooled to ordinary temp. in a furnace or with a neutral gas such as N2 or Ar. Thus, the improvement of the cast structure and surface hardening due to nitriding are carried out simultaneously.
JP10808579A 1979-08-27 1979-08-27 Surface hardening method for cast titanium alloy Pending JPS5633474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10808579A JPS5633474A (en) 1979-08-27 1979-08-27 Surface hardening method for cast titanium alloy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10808579A JPS5633474A (en) 1979-08-27 1979-08-27 Surface hardening method for cast titanium alloy

Publications (1)

Publication Number Publication Date
JPS5633474A true JPS5633474A (en) 1981-04-03

Family

ID=14475486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10808579A Pending JPS5633474A (en) 1979-08-27 1979-08-27 Surface hardening method for cast titanium alloy

Country Status (1)

Country Link
JP (1) JPS5633474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5167725A (en) * 1990-08-01 1992-12-01 Ultracision, Inc. Titanium alloy blade coupler coated with nickel-chrome for ultrasonic scalpel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5167725A (en) * 1990-08-01 1992-12-01 Ultracision, Inc. Titanium alloy blade coupler coated with nickel-chrome for ultrasonic scalpel

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