赵日东,黄华贵,陈雷,高林,杨家辉

• 1:燕山大学国家冷轧板带装备及工艺工程技术研究中心
• 2:二重(德阳)重型装备有限公司

摘要(Abstract)：

为了开发TRIP钢的热轧在线控制冷却工艺,以700 MPa级TRIP钢为研究对象,利用JMatPro软件计算其轧后冷却相变特征,根据计算获取的CCT曲线优化设计TRIP钢的三段式冷却工艺,并利用ThermecMastor-Z热模拟试验机进行模拟试验,测定试验钢在指定冷却工艺下的显微组织特征、各相含量百分比以及力学性能。结果表明:为了获得低屈服强度和高抗拉强度的综合性能,需提高第一阶段和第三阶段的冷却速度并延长第二阶段的冷却时间,推荐三段式冷却工艺为:精轧出口以40℃/s速率冷却至750℃,随后以3℃/s速率缓冷20 s,最后以40℃/s速率冷却至420℃进行卷取。结合实测结果对计算所得的CCT曲线予以微调,获得了可准确量化的试验钢连续冷却相变特征,对热轧700 MPa级TRIP钢的冷却工艺制定具有重要意义。

关键词(KeyWords)： TRIP钢;JMatPro;相变;CCT曲线;控制冷却

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(51675467)

作者(Author): 赵日东,黄华贵,陈雷,高林,杨家辉

DOI: 10.13289/j.issn.1009-6264.2021-0272

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