康军伟,周延军,刘海涛,宋克兴,张勇,孔令宝,吕官丽,岳丽娟

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:西北稀有金属材料研究院宁夏有限公司

摘要(Abstract)：

采用Gleeble-1500D数控动态热力模拟试验机,对C17200(Cu-1.9Be-0.3Co)合金进行了热压缩试验,研究了该合金在变形温度为600、650、700、750和800℃,应变速率为0.01、0.1、1、5和10 s~(-1),总压缩应变量为50%条件下的热变形行为。结果表明:合金的峰值应力随应变速率的增加和温度的降低而升高,C17200合金为热(负温度)敏感型和正应变速率敏感型合金,应变速率为1 s~(-1)、5 s~(-1)和10 s~(-1)时,合金软化机制以动态回复为主,应变速率为0.01 s~(-1)和0.1 s~(-1)时,合金软化机制以动态再结晶为主,且高温低应变速率有利于促进合金发生动态再结晶;基于Arrhenius双曲正弦本构关系得到了C17200合金的峰值流变应力本构方程;基于MATLAB平台编程构建了应变量为0.1～0.6时C17200合金的热加工图,在实验范围内获得安全加工区的热加工工艺参数区间为:变形温度750～800℃,应变量0.4～0.6,应变速率0.1～0.2 s~(-1)。

关键词(KeyWords)： C17200合金;热变形行为;本构方程;MATLAB;热加工图

Abstract:

Keywords:

基金项目(Foundation): 河南省创新引领专项(191110210400);; 河南省高等学校重点科研项目(19A430012);; 河南省杰出人才创新基金(182101510003)

作者(Author): 康军伟,周延军,刘海涛,宋克兴,张勇,孔令宝,吕官丽,岳丽娟

DOI: 10.13289/j.issn.1009-6264.2020-0124

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