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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Mn和P在超低碳烘烤硬化钢中的分布形态及对其拉伸行为的影响研究
DOI: 10.3724/SP.J.1037.2010.00693, PP. 263-268
Keywords: 超低碳烘烤硬化钢,三维原子探针(3DAP),固溶元素分布,屈服平台,内耗
Abstract:
将2种不同成分的烘烤硬化钢(BH-Mn钢和BH-P钢)加热至800℃,保温2min后水淬;采用3DAP技术、内耗实验及拉伸性能检测分析Mn和P对超低碳BH钢的间隙原子分布及Cottrell气团的影响,从而得出固溶元素分布对拉伸行为的影响机制.结果显示,在BH-P钢中,P以明显的偏聚形式存在,并和C发生共偏聚现象,从而造成对位错的强烈钉扎,这是导致拉伸过程中BH-P钢产生明显屈服平台的主要原因;在BH-Mn钢中,由于固溶Mn几乎不产生偏聚,而且固溶C的偏聚也很少,因此BH-Mn钢的强度低于BH-P钢,塑性则优于后者;P和C的共同偏聚及其对位错的强烈钉扎能够影响Snoek-Ke-Koster内耗,使Snoek-Ke-Koster峰消失.
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