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高强化柴油机气门座激光相变硬化温度场的数值模拟

Numerical Simulation of Temperature Field in Laser Phase-Transformation Hardening of Highly-Enhanced Diesel Engine Valve Seats

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摘要

通过建立高强化柴油机气门座激光相变硬化温度场的数值模拟模型,分析了激光相变硬化过程中工艺参数对气门座温度场的影响。结果表明,随着激光功率的增大,气门座相变硬化的峰值温度升高,温度场呈拖尾的彗星状,硬化层的深度和宽度增大;随着扫描速度的增大,气门座相变硬化的峰值温度降低,温度场拖尾的彗星形状减小,硬化层的深度和宽度减小;随着光斑半径的增大,气门座相变硬化的峰值温度降低且位置发生偏移,温度场拖尾的彗星形状增大,硬化层的深度减小。

Abstract

A numerical simulation model of the temperature field in the laser phase-transformation hardening of the highly-enhanced diesel engine valve seats is established and the influences of different process parameters on this temperature field are investigated in the laser phase-transformation hardening process. The results show that, with the increase of the laser power, the peak temperature of the phase-transformation hardening of the valve seats increases, the temperature field presents a cometary shape with a tail, and the depth and the width of the hardened layer increase synchronously. In contrast, with the increase of the scanning speed, the peak temperature of the phase-transformation hardening of the valve seats decreases, the cometary tail of the temperature field gets smaller, and the depth and the width of the hardened layer decrease synchronously. Moreover, with the increase of the laser spot radius, the peak temperature of the phase-transformation hardening of the valve seats decreases and its corresponding position shifts, the cometary tail of the temperature field gets larger, the depth of the hardened layer decreases.

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中图分类号:TG156.33

DOI:10.3788/LOP55.111601

所属栏目:材料

基金项目:国家自然科学基金(U1633111,51206179)、中国民航大学蓝天青年科研资金

收稿日期:2018-04-18

修改稿日期:2018-04-27

网络出版日期:2018-05-25

作者单位    点击查看

谭雯丹:中国民航大学机场学院, 天津 300300
庞铭:中国民航大学机场学院, 天津 300300
江国业:中国民航大学机场学院, 天津 300300
付威:中国民航大学机场学院, 天津 300300
张啸寒:中国民航大学机场学院, 天津 300300
胡定云:中国北方发动机研究所, 天津 300400
崔静:中国民航大学机场学院, 天津 300300
杨广峰:中国民航大学机场学院, 天津 300300

联系人作者:庞铭(mingpang1980@126.com); 谭雯丹(747074365@qq.com);

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引用该论文

Tan Wendan,Pang Ming,Jiang Guoye,Fu Wei,Zhang Xiaohan,Hu Dingyun,Cui Jing,Yang Guangfeng. Numerical Simulation of Temperature Field in Laser Phase-Transformation Hardening of Highly-Enhanced Diesel Engine Valve Seats[J]. Laser & Optoelectronics Progress, 2018, 55(11): 111601

谭雯丹,庞铭,江国业,付威,张啸寒,胡定云,崔静,杨广峰. 高强化柴油机气门座激光相变硬化温度场的数值模拟[J]. 激光与光电子学进展, 2018, 55(11): 111601

被引情况

【1】庞铭,张啸寒,刘光,谭雯丹,付威,江国业. 预热温度对激光熔凝RuT300温度场的影响规律. 激光与光电子学进展, 2019, 56(7): 71601--1

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