| 退火温度对冷轧气相沉积高纯钨再结晶行为的影响 |
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| 引用本文： | 檀校,郝玉朋,于晓东,王玉天,谭成文,胡劲.退火温度对冷轧气相沉积高纯钨再结晶行为的影响[J].金属热处理,2021,46(3):33-38. |
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| 作者姓名： | 檀校 郝玉朋 于晓东 王玉天 谭成文 胡劲 |
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| 作者单位： | 1.昆明理工大学 材料科学与工程学院, 云南 昆明 650093; 2.北京理工大学 材料学院, 北京 100081 |
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| 摘 要： | 通过不同温度的退火试验研究了化学气相沉积高纯钨冷轧后的再结晶行为。结果表明,冷轧钨中形成层状异质结构,提高了材料的应变硬化率,进而提高了塑性,韧脆转变温度降低到200 ℃以下,硬度从沉积态的402 HV0.2提高到547 HV0.2。高温退火后,冷轧钨在1100 ℃发生再结晶,与沉积态钨相比,再结晶温度降低了880 ℃,这是由于低温塑性变形导致材料储存能升高,再结晶驱动力提高,再结晶温度降低。随着退火温度的升高,由于晶粒尺寸的增大,层状异质结构逐渐消失,硬度迅速降低到完全再结晶态的370 HV0.2,而屈服强度从冷轧态的1224 MPa逐渐降低到1800 ℃退火后的558 MPa,但韧脆转变温度仍保持在200 ℃以下。
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| 关 键 词： | 化学气相沉积 冷轧钨 再结晶 韧脆转变温度 |
| 收稿时间： | 2020-11-19 |
Effect of annealing temperature on recrystallization behaviors of cold-rolled high-purity CVD tungsten |
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| Tan Xiao,Hao Yupeng,Yu Xiaodong,Wang Yutian,Tan Chengwen,Hu Jin.Effect of annealing temperature on recrystallization behaviors of cold-rolled high-purity CVD tungsten[J].Heat Treatment of Metals,2021,46(3):33-38. |
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| Authors: | Tan Xiao Hao Yupeng Yu Xiaodong Wang Yutian Tan Chengwen Hu Jin |
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| Affiliation: | 1. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China; 2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Recrystallization behavior of chemical vapor deposited high purity tungsten after cold-rolling was studied by using annealing experiments at different temperatures.The results show that layered heterostructure is formed in the cold-rolled tungsten,which improves the strain hardening rate of the material,thereby improving the plasticity.After cold rolling,the ductile-brittle transition temperature is reduced to below 200℃,and the hardness is increased from 402 HV0.2 in deposited state to 547 HV0.2.After high temperature annealing,the cold-rolled tungsten recrystallizes at 1100℃,and the recrystallization temperature is reduced by 880℃compared with the deposited tungsten.This is because the storage energy of the material is increased due to low-temperature plastic deformation,and the recrystallization driving force is increased,so the recrystallization temperature decreases.As the annealing temperature increases,the layered heterostructure gradually disappears due to the increase of grain size,the hardness rapidly decreases to 370 HV0.2 in the fully recrystallized state,and the yield strength gradually decreases from 1224 MPa in the cold-rolled state to 558 MPa after annealing at 1800℃,but the ductile-brittle transition temperature remains below 200℃. |
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| Keywords: | chemical vapor deposition(CVD) cold-rolled tungsten recrystallization ductile-brittle transition temperature |
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