| 38CrMoAl钢中粒状贝氏体对渗氮层组织和性能的影响 |
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| 引用本文： | 陆卫东,刘雪燕,李耀华,黄海清.38CrMoAl钢中粒状贝氏体对渗氮层组织和性能的影响[J].热处理,2006,21(4):28-32. |
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| 作者姓名： | 陆卫东 刘雪燕 李耀华 黄海清 |
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| 作者单位： | 711研究所传动部,上海,200051 |
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| 摘 要： | 着重研究了38CrMoAlA钢中粒状贝氏体对渗氮层组织和性能的影响，指出，粒状贝氏体的存在会使氮化层表面形成脆性针状氮化物，导致渗层表面发生剥落。而晶粒细化会使脆性改善，同时使渗层的硬度梯度更加平缓。
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| 关 键 词： | 38CrMoAlA钢 粒状贝氏体 渗氮层 脆性 晶粒度 |
| 文章编号： | 1008-1690（2006）04-0028-005 |
| 收稿时间： | 2006-07-26 |
| 修稿时间： | 2006年7月26日 |
Effect of Granular Bainite in 38CrMoAlA Steel on Microstructure and Property of Nitrided Case |
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| LU Wei-dong,LIU Xue-yan,LI Yao-hua,HUANG Hai-qing.Effect of Granular Bainite in 38CrMoAlA Steel on Microstructure and Property of Nitrided Case[J].Heat Treatment,2006,21(4):28-32. |
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| Authors: | LU Wei-dong LIU Xue-yan LI Yao-hua HUANG Hai-qing |
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| Affiliation: | Shanghai Marine Diesel Engine Research Institute, Shanghai 200051 |
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| Abstract: | The research gave emphasis to effect of granular bainite in the 38CrMoAIA steel on microstructure and property of its nitrided case. The research indicated that the granular bainite present in the 38CrMoAIA steel would result in formation of brittle acicular nitrides in the nitrided case,and thus surface of the nitriding layer would exfoliate. Grain refining would reduce brittleness of the nitrided case and cause hardness profile in the nitrided case to become even more gentle. |
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| Keywords: | 38CrMoAIA steel granular bainite nitriding layer brittleness grain size |
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