提高铝合金压铸模寿命的途径  

Ways to Increase Service Life of Die-casting Die for Aluminum Alloy

作　　者：彭淑君[1] 杨永泉[1] 

机构地区：[1]邵阳纺织机械有限责任公司,湖南邵阳422000

出　　处：《热处理》2013年第2期49-52,共4页Heat Treatment

摘　　要：3Cr2W8V钢制铝合金压铸模经1110℃油淬、720～750℃回火(预备热处理),1090℃奥氏体化、270℃等温淬火和610℃回火2次,使其硬度由27 HRC提高到34～35 HRC,再经盐浴渗氮后,其使用寿命可从压铸10 000件提高到57 000件。如将盐浴渗氮改为盐浴S-N-C共渗并在使用中间进行除应力处理,可使模具寿命达到8～11万件。此外还介绍了H13钢压铸模的热处理工艺。After prior heat treatment consisting of heating to 1100 ℃and oil quenching and tempering at 720 to 750 ℃ ,the die-casting die of 3Cr2W8V steel for aluminum alloy was austenitized at 1090 ℃ and martempered at 270 ℃ ,and subsequently tempered at 610℃ for two times,so as to increase its hardness from 27 to 34 to 35 HRC apart from being further liquid nitrided. As a result, the service life of the die would be increased from die-casting 10 000 pieces of part to die-casting 57 000 pieces of part. If liquid sulphonitrocarburizing instead of the liquid nitriding is used and stress relieving is done in service, the die-casting life of the die will reach 80 000 to 110 000 pieces of part. Furthermore, the heat treatment process of H13 steel die-casting die was introduced.

关 键 词：压铸模 等温淬火 盐浴S-N—C共渗 

分 类 号：TG162.4[金属学及工艺—热处理]