JPS57116762A - Heat resistant cast steel - Google Patents

Heat resistant cast steel

Info

Publication number
JPS57116762A
JPS57116762A JP9136881A JP9136881A JPS57116762A JP S57116762 A JPS57116762 A JP S57116762A JP 9136881 A JP9136881 A JP 9136881A JP 9136881 A JP9136881 A JP 9136881A JP S57116762 A JPS57116762 A JP S57116762A
Authority
JP
Japan
Prior art keywords
heat resistant
cast steel
resistant cast
coarsening
strengthens
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
JP9136881A
Other languages
Japanese (ja)
Other versions
JPS5935428B2 (en
Inventor
Junichi Sugitani
Teruo Ashimoto
Makoto Takahashi
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP9136881A priority Critical patent/JPS5935428B2/en
Publication of JPS57116762A publication Critical patent/JPS57116762A/en
Publication of JPS5935428B2 publication Critical patent/JPS5935428B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Heat Treatment Of Articles (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

PURPOSE: To obtain a heat resistant cast steel with excellent creep rupture strength at ≥ about 1,000°C high temp., excellent thermal impact resistance, etc. by adding N, Ti and Al or B to a heat resistant cast steel contg. Cr, Ni and Nb.
CONSTITUTION: This heat resistant cast steel consists of, by wt., 0.3W0.6% C, ≤2.0% Si, ≤2.0% Mn, 20W30% Cr, 30W40% Ni, 0.3W1.5% Nb, 0.04W0.15% N, 0.04W0.15% Ti, 0.02W0.07% Al or 0.0002W0.004% B and the balance essentially Fe. N stabilizes and strengthens the austenite phase in the form of solubilized nitrogen, and it forms nitride together with Ti, etc., makes the grains fine, and inhibits the growth in the presence of Al or B, thereby contributing to improvements in the strength at high temp. and the thermal impact characteristics. Ti and Al show said effects. B strengthens the grain boundaries of the steel matrix, and it prevents a Ti-base precipitate from coarsening, contributes to the formation of such a fine precipitate, and retards the cohesion and coarsening after the precipitation, thereby enhancing the creep rupture strength.
COPYRIGHT: (C)1982,JPO&Japio
JP9136881A 1981-06-13 1981-06-13 heat resistant cast steel Expired JPS5935428B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9136881A JPS5935428B2 (en) 1981-06-13 1981-06-13 heat resistant cast steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9136881A JPS5935428B2 (en) 1981-06-13 1981-06-13 heat resistant cast steel

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP56003602A Division JPS596907B2 (en) 1981-01-12 1981-01-12 heat resistant cast steel

Publications (2)

Publication Number Publication Date
JPS57116762A true JPS57116762A (en) 1982-07-20
JPS5935428B2 JPS5935428B2 (en) 1984-08-28

Family

ID=14024429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9136881A Expired JPS5935428B2 (en) 1981-06-13 1981-06-13 heat resistant cast steel

Country Status (1)

Country Link
JP (1) JPS5935428B2 (en)

Also Published As

Publication number Publication date
JPS5935428B2 (en) 1984-08-28

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