| La2O3含量及退火温度对钼合金晶粒尺寸及显微硬度的影响 |
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| 引用本文： | 王林,孙军,刘刚,张国君.La2O3含量及退火温度对钼合金晶粒尺寸及显微硬度的影响[J].中国钼业,2014,38(2):36-42. |
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| 作者姓名： | 王林 孙军 刘刚 张国君 |
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| 作者单位： | 1. 金堆城钼业股份有限公司技术中心,陕西西安,710077
2. 西安交通大学金属材料强度国家重点实验室,陕西西安,710049 |
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| 基金项目： | 国家"十二五"科技支撑计划项目:钨、钼的增值化利用产业化技术开发 |
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| 摘 要： | 本文研究了La2O3含量及退火温度对钼合金晶粒尺寸及显微硬度的影响规律,利用位错理论分析了La2O3对晶粒长大和显微硬度的影响机理。结果表明：随着第二相颗粒La2O3含量的增加,钼合金晶粒长大和再结晶的退火温度有升高的趋势;La2O3的强化效果并非随含量增加而线性增大,添加的La2O3含量处在0.27%～0.49%范围时,钼合金显微硬度的增幅最大,当La2O3含量大于0.49%时显微硬度增幅减小;随着退火温度的升高,钼合金显微硬度逐渐降低。
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| 关 键 词： | La2O3 退火 钼合金 晶粒尺寸 显微硬度 |
INFLUENCE OF THE CONTENT OF LA2O3 AND ANNEALING TEMPERATURE ON GRAIN SIZE AND MICROHARDNESS OF MO ALLOYS |
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| WANG Lin,SUN Jun,LIU Gang,ZHANG Guo-jun.INFLUENCE OF THE CONTENT OF LA2O3 AND ANNEALING TEMPERATURE ON GRAIN SIZE AND MICROHARDNESS OF MO ALLOYS[J].China Molybdenum Industry,2014,38(2):36-42. |
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| Authors: | WANG Lin SUN Jun LIU Gang ZHANG Guo-jun |
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| Affiliation: | WANG Lin;SUN Jun;LIU Gang;ZHANG Guo-jun;Jinduicheng Molybdenum Co. ,Ltd.;Xi’an Jiaotong University; |
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| Abstract: | Influence of the content of La2O3and annealing temperature on grain size and micro-hardness of Mo alloys was investigated. Impact mechanism of La2O3on grain growth and micro-hardness was analysized by dislocation theory. The increase in La2O3content causes a raise in grain growth and recrystallization temperature. However,the increase in strength is not linearly proportional with the La2O3content. When the La2O3content is within 0. 27% ～ 0. 49%,significant strengthening response is achieved,when the La2O3content is above 0. 49%,the increase amplitude of microhardness is decreased. As the annealing temperature increasing,the microhardness of Mo alloy decreased. |
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| Keywords: | La2O3 annealing Mo alloys grain size microhardness |
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