摘要
利用ABAQUS有限元软件对7075铝合金汽车支撑摆臂锻件固溶处理过程温度场进行数值模拟,得到了锻件在不同升温方式、不同转运时间以及不同水温淬火下的温度场分布情况。结果表明,锻件随炉升温时,达到预定温度所需时间为112.1 min,最大温差为4.8℃;炉子到温后放入锻件升温时仅需71.2 min,最大温差为10.4℃。转运时间为3、3.5和4 min时,锻件中冷却最快部位的温度分别下降到384.0、375.9和367.8℃,最终确定转运时间不能超过3.5 min。采用25℃水淬时,冷却时间为95 s,冷却最快和最慢部位通过淬火温度敏感区的平均冷却速度分别为782.8和19.1℃/s,最大温差为237.6℃;80℃水淬时,冷却时间为56 s,锻件中冷却最快和最慢部分通过淬火温度敏感区的平均冷却速度则分别为587.4和16.8℃/s,最大温差为216.0℃。
Temperature field of 7075 aluminum alloy automobile support swing arm forging in solid solution treatment process was simulated by ABAQUS finite element software,and the temperature field distributions of the forging under different heating ways,transfer time and quenching water temperatures were obtained.The results show that when heating up along with the furnace,the time required for the forging to reach the preset temperature is 112.1 min and the maximum temperature difference is 4.8℃;when the forging is loaded after the furnace reaches the preset temperature,the required time and the maximum temperature difference are 71.2 min and 10.4℃,respectively.When the transfer time is 3,3.5 and 4 min,the temperature of the fastest cooling part in the forging decreases to 384.0,375.9 and 367.8℃respectively,so the transfer time is finally selected as less than 3.5 min.When quenched in 25℃water,the cooling time is 95 s,the average cooling rate of the fastest and the slowest parts of the forging passing through the quench temperature sensitive zone is 782.8 and 19.1℃/s respectively,and the maximum temperature difference is 237.6℃.When quenched in 80℃water,the cooling time is 56 s,and the average cooling rate of the fastest and slowest parts of the forging passing through the quenching temperature sensitive zone is 587.4 and 16.8℃/s respectively,and the maximum temperature difference is 216.0℃.
作者
杨红斌
卜恒勇
李萌蘖
Yang Hongbin;Bu Hengyong;Li Mengnie(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第10期212-217,共6页
Heat Treatment of Metals
基金
云南省稀贵金属材料基因工程(一期)(2018ZE014)。
关键词
7075铝合金
固溶处理
数值模拟
温度场
7075 aluminum alloy
solution treatment
numerical simulation
temperature field
