金属学报  1987, Vol. 23 Issue (4): 368-378

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电子束相变硬化处理表面温度场的数值计算

赵海鸥;冯燕武;唐传芳;朱沅浦

机械部北京机电研究所;机械部北京机电研究所;机械部北京机电研究所;机械部北京机电研究所

NUMERICAL CALCULATION OF TEMPERATURE DISTRIBUTION DURING ELECTRON BEAM TRANSFORMATION HARDENING

by ZHAO Hai'ou; FENG Yanwu; TANG Chuanfang; ZHU Yuanpu (Beijing Research Institute of Mechanical and Electrical Technology; Ministry of Machine Building Industry) (Manuscript received 10 January; 1986; revised manuscript 9 April; 1986)

赵海鸥;冯燕武;唐传芳;朱沅浦. 电子束相变硬化处理表面温度场的数值计算[J]. 金属学报, 1987, 23(4): 368-378.
, , , . NUMERICAL CALCULATION OF TEMPERATURE DISTRIBUTION DURING ELECTRON BEAM TRANSFORMATION HARDENING[J]. Acta Metall Sin, 1987, 23(4): 368-378.

摘要 参考文献 相关文章 Metrics 全文: PDF(2666 KB)   摘要: 本文从理论和实验两方面,对20钢电子束相变硬化处理表面的热传导问题进行了研究.建立了移动半无限大工件、表面受均匀矩形热源加热的稳态、三维热传导模型.用有限差分方法数值求解了工件表面的温度场.由此估算了不同工艺参数处理对的表面最高温度、加热和冷却速度等一些无法实测的数据.基于材料热物性参数为常数的假设,得出了工艺参数与表面熔化温度之间的关系.此关系可作为电子束相变硬化处理时恰当选择工艺参数的依据.在实验方面,通过改变功率、移动速度和束斑尺寸等工艺参数,研究了20钢表面处理层的显微组织、相变区的形状和深度,确定了表面熔化的开始.实验结果与计算值两者符合较好.从而证明此计算模型是有效的. Abstract：The problem of the heat transfer of the electron beam surface hardening of steel 20 was considered from both theoretical Viewpoint and experiment. A steadystate, three-dimensional heat flow model in a moving semi-infinite workpiece subjected to a stationary uniform rectangular heat source was developed. The temperature distribution of the workpiece has been numerically derived by the finite difference method, from which some unmeasurable parameters such as peak temperature, heating and cooling rates are evaluated. For a given material, the relationship between the parameters and the surface melting point was obtained with the assumption of the constant thermal properties. It provides a basis for selecting proper operating conditions during the electron beam transformation hardening. In the experiment, on the other hand, the microstructures of the transformation zone were studied with varying parameters such as beam power, the travelling speed of the workpiece and the beam size. The microstructure, shape and depth of the transformation zone of the treated surface layer,o,n the steel 20 have been investigated and the starting of its surface fusion has been determined. The experimental results are quite in agreement with the numerical calculation. Thus, the model abovementioned seems to be available. 收稿日期: 1987-04-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 赵海鸥 冯燕武 唐传芳 朱沅浦 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1987/V23/I4/368 1 Kou S, Sun D K, Le Y P. Metall Trans, 1983; 14A: 643． 2 Mawella K J A. Met Sci, 1984; 18:549 3 Mazumder J, Steen W M. J Appl Phys, 1980; 51:941 4 川寄一博,高岡憲久,山崎隆雄,尾崎良二.热处理,1980;20(6) :281 5 刘云旭主编.金属热处理原理,机械工业出版社,1981:17,191 6 横田清義,铁钢急速加热变态研究,中島宏,東京,1971;10 1971 7 房为捷,于志勤.金属热处理,1982;(6) :1 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed