| 32Mn-7Cr-0.6Mo-0.3N奥氏体钢低温变形与断裂的特征 |
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| 引用本文： | 郑炀曾,付瑞东,任一宾. 32Mn-7Cr-0.6Mo-0.3N奥氏体钢低温变形与断裂的特征[J]. 燕山大学学报, 2000, 24(4): 313-316 |
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| 作者姓名： | 郑炀曾 付瑞东 任一宾 |
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| 作者单位： | 燕山大学材料科学与化学工程学院,秦皇岛,066004 |
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| 基金项目： | 国家自然科学基金!59771001 |
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| 摘 要： | 测定了３２Ｍｎ－７Ｃｒ－０．６Ｍｏ－０．３Ｎ奥氏体钢７７Ｋ温度下的力学性能、组织稳定性，并研究了其低温变形和断裂行为。结果表明：该钢具有很好的低温强度和韧性以及高的组织稳定性。由于氮原子的影响以及在低温变形过程中产生的滑移带、形变孪晶、位错间的相互作用，导致该钢具有较高的加工硬化率和高的均匀延伸率。该钢于７７Ｋ发断口为韧窝占主导并混有少量准解理小刻面的韧性断裂特征。
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| 关 键 词： | 高锰奥氏体钢 低温变形 断裂 穿晶断裂 断口形貌 |
| 修稿时间： | 2000-08-10 |
Cryogenic Deformation and Fracture Characteristic of 32Mn-7Cr-0. 6Mo-0. 3N Austenitic Steel |
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| Zheng Yangzeng,Fu Ruidong,Ren Yibin. Cryogenic Deformation and Fracture Characteristic of 32Mn-7Cr-0. 6Mo-0. 3N Austenitic Steel[J]. Journal of Yanshan University, 2000, 24(4): 313-316 |
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| Authors: | Zheng Yangzeng Fu Ruidong Ren Yibin |
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| Affiliation: | Zheng Yangzeng,Fu Ruidong,Ren Yibin(The College of Materials Science and Cheymical Engineering of Yanshan University, Qinhuangdao 066004) |
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| Abstract: | The mechanic properties, stability of phase, behaviorof cryogenic deformation and fracture of 32Mn-7Cr0. 6Mo-0. 3Naustenitic steel at 77K were investigated. The results show thatthis steel has satisfied cryogenic strength and toughness, highstability of phase. The effects of Nitrogen atoms and the inter-action among slip-bands, deformation twins and dislocationsformed during cryogenic deformation result in high work-hardening rate and homogeneous elongation. The cryogenicintergranular fracture is fully restricted. The transgranular frac-ture occurs along {111}r planes. The fracture sndce at 77Kmainly consists of large quantity of dimples and a little of smallquasi-cleavage facets. |
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| Keywords: | high manganese austenitic steel transgranular fracture fracture surface |
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