单忠德,姜超,庄百亮,李新亚

• 1:机械科学研究总院先进制造技术研究中心
• 2:先进成形技术与装备国家重点实验室

摘要(Abstract)：

采用Gleeble热模拟试验,结合光学显微镜观察、硬度测试及计算分析方法,研究了超高强钢冷轧钢板B1500HS在低冷速(不大于40℃/s)变形下的微观组织和力学性能,并归纳总结了B1500HS钢的显微硬度与晶粒尺寸之间的Hall-Petch关系。结果表明,在热模拟试验中,变形温度的降低、冷却速度的增加或应变速率的增加,都可以细化铁素体晶粒,提高材料力学性能;B1500HS钢的显微硬度HV和晶粒尺寸d之间的Hall-Petch关系可表达为:HV=-290.8+0.987 d-1/2,经验证,对晶粒尺寸在3.3~4.7μm范围的超高强钢B1500HS钢板材,其显微硬度的计算值与测量值偏差较小,Hall-Petch关系具有很好的适用性。

关键词(KeyWords)： B1500HS钢;热模拟;晶粒尺寸;Hall-Petch关系

Abstract:

Keywords:

基金项目(Foundation): 国家国际科技合作项目(2011DFA50810);; 国家重点基础研究发展计划(2012CB724301)

作者(Author): 单忠德,姜超,庄百亮,李新亚

DOI: 10.13289/j.issn.1009-6264.2014.04.026

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