吴挺,丁文红,祁聪,孙力,刘天武,潘进,张志强

• 1:武汉科技大学耐火材料与冶金国家重点试验室
• 2:河钢集团钢研总院
• 3:河钢集团邯钢公司技术中心

摘要(Abstract)：

研究了不同升温速率回火条件下,碳化物尺寸及形貌对高强钢残余应力的影响。结果表明:300℃低温阶段,合金渗碳体析出使残余应力所产生的弹性应变转化为析出塑性应变,是试验钢残余应力得以消减的关键因素。析出塑形应变的大小与析出碳化物的尺寸、形貌密切相关。碳化物的尺寸越细小、分布越弥散,产生的析出塑性越大。升温速率是影响碳化物形貌及分布的重要因素,高升温速率有助于基体保持较高密度的位错,诱导碳化物在晶内弥散析出,增加碳化物析出过程中的残余应力调控能力。500～650℃高温阶段,合金碳化物的析出主导材料的析出塑性行为。由于合金碳化物的尺寸更小,分布更为弥散,因此,高温阶段合金碳化物的析出对残余应力的调控能力更为显著。

关键词(KeyWords)： 升温速率;残余应力;碳化物析出;相变塑性

Abstract:

Keywords:

基金项目(Foundation): 湖北省技术创新专项重大项目(2018AA005)

作者(Author): 吴挺,丁文红,祁聪,孙力,刘天武,潘进,张志强

DOI: 10.13289/j.issn.1009-6264.2020-0327

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