摘要
针对由某公司生产应用于核压力容器的SA508-3钢,为了获得不同高温下的组织性能特征参数,在Gleeble1500D热模拟机上,采用凝固法对800～1 300℃共6个温度水平进行拉伸试验。结果表明,断面收缩率、应变和热强度在1 000℃时为最大值;6个试验温度下断口附近的组织是形态各异的板条马氏体;800、1 000和1 300℃试验温度下的断口剖面最大硬度分别位于距断口10、14和18 mm处,且1 000℃拉伸试样的硬度变化幅度小,其它2个试验温度下的试样硬度变化幅度较大;低温塑性的断口形貌是以沿晶脆性断裂为主;为后续焊接数值模拟工作提供参考数据有着重要的实用价值。
The material SA508-3 steel used for nuclear power was subjected to tensile test in six temperature levels（800~1 300 ℃） by solidifying methods on Gleeble-1500D thermal simulation testing machine to analyze its microstructure changes.It was found that the strain,reduction in area,and thermal strength were all reached the most value at 1 000 ℃.The fracture organization of six temperatures were the different form lath martensite.The maximum hardness of 800,1 000 and 1 300 ℃ test sample were at 10,14 and 18 mm,respectively,and the hardness range ability of 1 000 ℃ was the lesser,the others were the larger extent.The fracture morphology of low temperature plastics was main inter granular brittle fracture,which provided the basic parameters for weld numerical simulation.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2011年第2期202-206,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家科技重大专项子课题资助项目(2009ZX04014-064-05)
关键词
SA508-3钢
高温拉伸试验
组织
SA508-3 steel
high temperature tensile test
microstructure
