固溶冷却速率对IN738LC合金组织及性能的影响.pdf

第40卷第11期
属熟餍
Vol 40 No. II
2015年11月
HEAT TREATMENT OF METAL
ovember 201
固溶冷却速率对IN738LC合金组织及性能的影响
周同金,马秀萍,田水,杨飞,刘佳
北京航空材料研究院,北京10005)
摘要:研究了固溶处理过程中不同冷却速率对TN738TC合金纽织及性能的影响。研究结果表明,γ'相尺寸随固溶处理后的冷却速
率提高而减小,y'相形貌也随着冷却速率的提高而更加规则,从而使拉伸强度和持久性能随冷却速率的提高而嶒加,而伸长率?降
低趋势。从1120℃以30~40℃/min的冷却速率冷却到850℃,再空冷到室温的热处理制度,能够使IN738⊥C合金具有最佳强度
和塑性匹配。
关键词:γ'相;固溶处理;冷却速率;显微组织;持久性能;抗拉强度
中图分类号:TG15694文献标志码:A文章编号:0254-6051(2015)11-0153-04
Effect of solution cooling rate on microstructure and mechanical
properties of IN738LC superalloy
Zhou Tongjin, Ma Xiuping, Tian Shui, Yang Fei, Liu Jia
(Beijing Institute of Aeronautical Materials, Beijing 100095, China
Abstract Effect of cooling rates uring solution treatment on microstructure and mechanical properties of IN 738LC superalloy were
investigated. The results show Ihat the size of phase ecreased with cooling rates during e solution treatment. The morphologies of y
phase become more regular with the increase of cooling rates. The tensile strength and the endurance performance increase with cooling rates
while the tensile elongation decrease. When rates at 30-40c/min from 1120 C to 850 ring solution rea ment, the sample can obtain
preferable mechanical properties
Key words y'phase; solution trealment cooling rate; microstructure; endurance property; tensile strength
IN738LC合金是在IN738C合金基础上进行的改
作者简介:周同金(1986-),,工程师.硬1,も要从事高温合金材将性低碳合金,含有四大难熔元素(W、Mo、Nb、Ta)的镍
收稿日期:2015-08-2
和铸造工艺研究,E-maill:kyhk2005@163.com
doi:10.13251/j.issn.02546051.2015.11.035
度高温合金的蠕变强度和抗热腐蚀性能。广泛应
alloy[ J. Malerials Science Forum, 2013, 749: 250-254
[13]曾渝.超高强 Al-zn-mg-cu-zr合金组织与性能研究[D].长沙:
7 Berg L K, Gjonnes J, Hansen V, el al. GP中南大学,2004:6876
and their role in artificial aging J. Acta Malerialia, 2001, 49(17)
Zeng Yu. Sludy on microstructure and properlies of ultrahigh strength
344.3-3-451
A1-n-mg-cu-yr alloy I 1)I. Changsha: Central South University
8 Gang S, Alfred C. Early-sluge precipilation in Al-n-mgcu alloy
2004.68-76
(7050)
Acla Malerialia. 200452.45034516
14 Waterloo G, Hansen V, Gjonnes J, et al. Effect of predeformation and
1 9 Hansen V, Stiller K, Waterloo ( et al. Structures and transformations
preaging at room temperature in Alzn-mgcu, Zr) alloys J
during artificial aging of an industrial 7xxx-series Al-zn-mg Zr alloy
Malerials Science and Eugineering: A, 2001, 303(1/2): 226-233
JI. Materials Science Forum, 2002, 396-402: 815-820
L15」马志怿,宋伟,王少华,等.时效状态对新高强铝合金型材
10 Ringer S P, Hono K. Microstructural evolulion and age hardening in
力学及腐蚀性能的影响「门.金属热处理,2014,39(9):15
aluminium alloys: Atom probe field-ion microscopy
Ma /hi
Wei, Wang Sh
et. al. Effects of
condi
electron microscopy studies J Materials Characterization, 2000, 44
on mechanical and corrosion properties of a new type high strength
/2):10113
ofile [J. Heat Trealmnenl of Metals, 2014, 39(9)
I 11 Mukhopadhyay A K. Cuinier-+res
ston zones i a
high-purity Al-n-ng 16 Tsai T(, Chuang TH. Technical Note: Relationship between
alloy [ J. Philosophical Magazine Lellers, 1994, 70(3): 135140
lectrical conductivity and slress corrosion cracking susceptibility of Al
L12」耿振华,陈志谦,李春梅,等.双级时效対AA7050合金组织和性
075 and Al 7475 Alloysljj. Corrosion, 1996