| 铸钢件准固态区域应力,应变数值模拟及热裂机制 |
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| 引用本文： | 贾宝仟,柳百成,王东涛. 铸钢件准固态区域应力,应变数值模拟及热裂机制[J]. 金属学报, 1997, 33(5): 504-508 |
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| 作者姓名： | 贾宝仟 柳百成 王东涛 |
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| 作者单位： | 清华大学!北京，100084 |
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| 基金项目： | 国家自然科学基金!59235102 |
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| 摘 要： | 对ＺＧ４５实验热裂试棒的数种工况进行了应力－应变的数值模拟，对热裂形成机制进行了讨论。研究认为：热裂起源于Ｂｉｎｇｈａｍ体，是塑性变形超过Ｂｉｎｇｈａｍ体塑性储备值所致。
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| 关 键 词： | 热裂机制 应力 应变 流变行为 数值模拟 铸钢件 |
| 收稿时间： | 1997-05-18 |
| 修稿时间： | 1997-05-18 |
NUMERICAL SIMULATION OF STRESS-STRAIN IN CASTING STEEL DURING SOLIDIFICATION AND FORMATION MECHANISM OF HOT-TEARING |
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| JIA Baoqian,LIU Baicheng,WANG Dongtao. NUMERICAL SIMULATION OF STRESS-STRAIN IN CASTING STEEL DURING SOLIDIFICATION AND FORMATION MECHANISM OF HOT-TEARING[J]. Acta Metallurgica Sinica, 1997, 33(5): 504-508 |
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| Authors: | JIA Baoqian LIU Baicheng WANG Dongtao |
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| Affiliation: | JIA Baoqian,LIU Baicheng,WANG Dongtao(Tsinghua University,Beijing ) |
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| Abstract: | As regard to several cases of real hot tearing ZG45 bars (C 0.42%-0.52%,Mn 0.5%- 0.8%, Si 0.2%- 0.45%), numerical simulation of stress-strain during solidification was conducted. The formation mechanism of hot tearing was discussed, and the conclusion is drawn that hot tearing originates from Bingham body and is caused when strain of Bingham body being over preserved plastic strain. The simulated results show that relative hot spot gives rise to increase in concentration strain of Bingham body, and that case of proper chilI could effectively decrease concentration strain of Bingham body, uponthere to reduce possibility of hot tearing. |
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| Keywords: | formation mechanism of hot tearing stress strain rheological behavior numerical simulation |
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