AlSi7MgCu0.5合金发动机曲轴箱热处理工艺优化  

Optimization of Heat Treatment Process for Engine Crank Case of AlSi7MgCu0.5 Alloy

作　　者：梁宝乙 Berger Andrea 李振宇 吕琳 刘宇 魏晓璐 LIANG Baoyi;Berger Andrea;LI Zhenyu;LV Lin;LIU Yu;WEI Xiaolu(BMW Brilliance Automotive Co.,Ltd.,Shenyang 10000,Liaoning China)

机构地区：[1]华晨宝马汽车有限公司,辽宁沈阳110000

出　　处：《热处理》2021年第6期33-35,共3页Heat Treatment

摘　　要：汽车发动机曲轴箱材料为AlSi7MgCu0.5合金,其热处理需要在炉温均匀性良好的炉中进行,对其力学性能、显微组织和畸变有严格的要求。通过合理布置炉内热电偶提高炉温均匀性、将固溶和时效温度相应提高至540℃和180℃,同时保温时间缩短0.5h,以及采用浓度为13%和温度为50℃的水基淬火液后,AlSi7MgCu0.5合金发动机缸体的热处理产量和质量均达到了要求。Automobile engine crank case made from AlSi7MgCu0.5 alloy must be heat treated in a furnace where temperature uniformity is satisfactory,and there are severe mechanical property,microstructure and distortion requirements for the engine crank case.The heat treatment output and quality of the engine cylinder of AlSi7MgCu0.5 alloy have conformed with the requirements by improving furnace temperature uniformity with reasonable thermocouple arrangement in the furnace,raising solution temperature to 540℃ and aging temperatures to 180℃ and shortening holding time by 0.5 h,as well as using aqueous quenchant with concentration of 13%at 50℃.

关 键 词：AlSi7MgCu0.5合金 曲轴箱 炉温均匀性 热处理 

分 类 号：TG156[金属学及工艺—热处理]