【摘要】 为了实现大型支承辊热处理过程的虚拟生产 ,运用非线性有限元法对大型支承辊在不同介质中淬火的温度场、组织场和应力 /应变进行了计算机模拟。结果表明 :淬火时间为 5 5min,淬火介质为油或UNCON (2 5 % )时 ,支承辊不能得到马氏体而硬度降低 ;以UNCON (1 5 % )或水为淬火介质时 ,可以得到大量的马氏体 ,支承辊硬度和淬硬层深也符合要求 ,但残余应力较大。对以UNCON (1 5 % )或水为淬火介质进一步优化 ,得出大型支承辊的热处理合适工艺为 :从加热炉中出炉后 ,空冷 5～ 1 0min ,然后淬水 1 5min,再转入 3 0 0℃的炉中保温 3 0h。更多还原

【Abstract】 In order to realize the virtual manufacture of a large scale bearing roller, the temperature field composition and stress/strain of the large scale bearing roller with different quenchants were optimized using the non li near FEM. The results show that the hardness of bearing roller is lower than the required because no martensite is formed when the quenching time is 55 min and the quenchant is the oil or UNCON (25w%). While the bearing roller is quenched into UNCON (15w%) or water, it can get a lot of martensite. At the same time, the hardness and quenching layer of bearing roller meets the needs, but the residual stress is larger. In addition, the quenching time of UNCON (15w%) and water is optimized. The best heat treatment procedure of large scale bearing roller is as follows: cooling in air for 5～10 min, quenching into water for 15 min, and put into annealing furnace at 300℃ holding for 30h.更多还原