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Title: Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel

Abstract

A heat-treated cast austenitic stainless steel alloy consisting essentially of about 13-17% chromium, about 13-17% manganese, about 1.5-2.5% molybdenum, about 1.0-2.0% carbon, about 0.5-15% niobium, about 0.5-1.5% silicon, with the balance being iron is described which is produced by the process comprising: casting the alloy; subjecting the alloy to a prebraze heat cycle treatment including heat treating the cast alloy at about 735/sup 0/-785/sup 0/C for about 18-22 hours followed by cooling; and subjecting the alloy to a braze cycle heat treatment including: a first stage heat treatment at about 1040/sup 0/-1090/sup 0/C for about 20-40 minutes followed by cooling; an optional second stage heat treatment at about 765/sup 0/-815/sup 0/C for about 14-18 hours followed by cooling; an optional third stage heat treatment at about 625/sup 0/-675/sup 0/C for about 14-18 hours followed by cooling.

Inventors:
;
Publication Date:
OSTI Identifier:
5002925
Patent Number(s):
US 4737204
Assignee:
Dept. of Energy, Washington, DC
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 10 Oct 1986
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STAINLESS STEELS; CASTING; HEAT TREATMENTS; MICROSTRUCTURE; THERMODYNAMIC PROPERTIES; AUSTENITIC STEELS; CARBON COMPOUNDS; CHEMICAL COMPOSITION; CHROMIUM ALLOYS; COOLING; EXTRACTIVE METALLURGY; IRON COMPOUNDS; MANGANESE ALLOYS; MOLYBDENUM ALLOYS; NIOBIUM COMPOUNDS; SILICON COMPOUNDS; VERY HIGH TEMPERATURE; ALLOYS; CORROSION RESISTANT ALLOYS; CRYSTAL STRUCTURE; FABRICATION; IRON ALLOYS; IRON BASE ALLOYS; METALLURGY; PHYSICAL PROPERTIES; REFRACTORY METAL COMPOUNDS; STEELS; TRANSITION ELEMENT COMPOUNDS; 360101* - Metals & Alloys- Preparation & Fabrication; 360102 - Metals & Alloys- Structure & Phase Studies; 360104 - Metals & Alloys- Physical Properties

Citation Formats

Anton, D L, and Lemkey, F D. Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel. United States: N. p., 1988. Web.
Anton, D L, & Lemkey, F D. Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel. United States.
Anton, D L, and Lemkey, F D. Tue . "Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel". United States.
@article{osti_5002925,
title = {Heat treatment giving a stable high temperature micro-structure in cast austenitic stainless steel},
author = {Anton, D L and Lemkey, F D},
abstractNote = {A heat-treated cast austenitic stainless steel alloy consisting essentially of about 13-17% chromium, about 13-17% manganese, about 1.5-2.5% molybdenum, about 1.0-2.0% carbon, about 0.5-15% niobium, about 0.5-1.5% silicon, with the balance being iron is described which is produced by the process comprising: casting the alloy; subjecting the alloy to a prebraze heat cycle treatment including heat treating the cast alloy at about 735/sup 0/-785/sup 0/C for about 18-22 hours followed by cooling; and subjecting the alloy to a braze cycle heat treatment including: a first stage heat treatment at about 1040/sup 0/-1090/sup 0/C for about 20-40 minutes followed by cooling; an optional second stage heat treatment at about 765/sup 0/-815/sup 0/C for about 14-18 hours followed by cooling; an optional third stage heat treatment at about 625/sup 0/-675/sup 0/C for about 14-18 hours followed by cooling.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {4}
}