| 07Cr12NiMoVNb耐热钢回火脆性研究 |
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| 引用本文： | 陈继志,王嘉敏.07Cr12NiMoVNb耐热钢回火脆性研究[J].材料开发与应用,2003,18(6):4-8. |
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| 作者姓名： | 陈继志 王嘉敏 |
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| 作者单位： | 洛阳船舶材料研究所,洛阳,471039 |
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| 摘 要： | 通过冲击试验和断口形貌分析确定07Cr12NiMoVNb耐热钢有回火脆性,并存在二个回火脆性温度区间(450～525℃和575～625℃)。低温回火脆性到高温回火脆性区间的断口形貌从准解理+解理到解理+沿晶断裂,出现沿晶断裂时,冲击值最低。为方便工程上判断是否出现回火脆性,借用了韧/脆转变的(FATT50)概念。
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| 关 键 词： | 耐热钢 回火脆性 断口形貌 |
| 文章编号： | 1003-1545(2003)06-0004-05 |
| 修稿时间： | 2003年2月20日 |
Study on Tempering Embrittlement of Heat-resistant 07Cr12NiMoVNb Steel |
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| Chen Jizhi,Wang Jiamin.Study on Tempering Embrittlement of Heat-resistant 07Cr12NiMoVNb Steel[J].Development and Application of Materials,2003,18(6):4-8. |
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| Authors: | Chen Jizhi Wang Jiamin |
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| Abstract: | The tempering embrittlement of 07Cr12NiMoVNb steel is examined through impact test and electron scanning fractographic analysis.It is revealed that two embrittlement temperature ranges,450～525℃ and 575～625℃ exist in the tempering of the steel.The fracture morphology manifesfs that the fracture mechanism changes from quasi-cleavage plus cleavage to cleavage plus intergranular as the tempering temperature rising and the impact toughness of the samples corresponding to intergranular fracture is the lowest.The concept of toughness-brittleness transition,that is FATT50,is adopted for the estimation of tempering temperature in engineering. |
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| Keywords: | Heat-resistant stell Tempering embrittlement Fracture morphology |
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