一、前言熔模铸造中,模壳强度一般是指模壳在焙烧前的湿强度和焙烧后的干强度以及金属烧注后模壳的残留强度。对于残留强度在一般厂多用化学清煮法清砂,对残留强度的大小不太敏感,问题也比较容易解决。本文着重讨论在熔模铸造中,感到最棘手的问题之一,就是如何在实际生产中制造高强 I. INTRODUCTION In investment casting, the strength of the mold shell generally refers to the wet strength of the mold shell before baking and the dry strength after baking as well as the residual strength of the mold shell after the metal is burned. Residue strength in the general plant with chemical clear method of sand cleaning, the size of the residual strength is not very sensitive to the problem is relatively easy to solve. This article focuses on one of the toughest problems in investment casting, which is how to make high strength in actual production