采用慢应变试验法(SSRT)测试了2Cr13不锈钢在1020℃淬火及不同回火温度条件下的应力腐蚀开裂(SCC)特性,并利用电阻应变计传感器设计原理,测试了回火温度对2Cr13钢力学滞后的影响.结果表明,在270～420%回火区间,随着回火温度升高,2Cr13钢强度略有增加,滞后略微减小,而应力腐蚀抗力则显著降低.分析认为,在试验温度区间,随温度升高,回火温度接近2Cr13钢敏化和第一类回火脆性温度,加之二次硬化效应,使得该材料应力腐蚀抗力随回火温度升高而显著降低;2Cr13钢力学滞后和其强度及亚结构有关,滞后误差随着材料强度增加而减少.
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