| 热变形参数对40CrNiMo钢组织的影响 |
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| 引用本文： | 张红英,曾忠,张鸿冰.热变形参数对40CrNiMo钢组织的影响[J].热加工工艺,2010,39(4). |
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| 作者姓名： | 张红英 曾忠 张鸿冰 |
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| 作者单位： | 1. 上海理工大学,机械工程学院,上海,200093
2. 上海应用技术学院,材料工程系,上海,200235 |
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| 摘 要： | 利用Gleeble1500热/力学模拟实验机,对40CrNiMo钢进行双道次热模拟单向压缩试验。分析了40CrNiMo钢在变形温度为950、760℃,变形速率为0.5～30s-1,变形量为0.05～0.4,热变形后的奥氏体组织特征。结果表明,在950℃时,奥氏体组织能发生动态再结晶,最终奥氏体晶粒形状取决于变形速率和变形量;40CrNiMo钢在760℃时奥氏体组织发生动态回复,最终奥氏体晶粒呈扁平的"薄饼"状,奥氏体晶粒的变形程度取决于变形量的大小。
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| 关 键 词： | 热变形 奥氏体组织 动态再结晶 |
Effects of Hot Deformation Parameters on Microstructure of 40CrNiMo Steel |
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| ZHANG Hongying,ZENG Zhong,ZHANG Hongbing.Effects of Hot Deformation Parameters on Microstructure of 40CrNiMo Steel[J].Hot Working Technology,2010,39(4). |
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| Authors: | ZHANG Hongying ZENG Zhong ZHANG Hongbing |
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| Affiliation: | ZHANG Hongying1,ZENG Zhong1,ZHANG Hongbing2 (1.College of Mechanical Engineering,Shanghai University of Science , Technology,Shanghai 200093,China,2.Department of Materials Engineering,Shanghai Institute of Technology,Shanghai 200235,China) |
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| Abstract: | The Gleeble-1500 heat/mechanics simulation experimental machine was used to do double-pass hot compressive test for 40CrNiMo steel, the microstructure character of 40CrNiMo steel's hot deformed austenite at 760 ℃ and950 ℃, in a strain rate rang of 0.5～30 s~(-1) and a strain rang of 0.05～0.4 was analyzed. Results indicate that austenite dynamic recrystallization takes place above 950 ℃. The final austenite grain depends on strain rate and deformation amount. Austenite dynamic recovery takes place at 760 ℃, The final austenite grain forms compressed "pancake" shape-like, the final deformation degree of austenite grain depends on deformation amount. |
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| Keywords: | 40CrNiMo 40CrNiMo steel hot deformation austenite dynamic recrystallization |
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