Wei Bokang Lin Hantong Liu Junmin Chai Qizou Tong Xinlin Mao Yufeng
Issue 3, Pages: 6-9(1993)
摘要:The process of shape change of Si crystals in the hypereutic Al-Si alloy modified with rare-earth metals is investigated. It is supposed that the modification mechanism of RE is different from that of Na in the fact that RE causes constitutional under-cooling in the solidifying front of Si crystals and results in a change of grouth morphology of Si from plate into fibrous form.
摘要:The relationship among several paramenters in the process of low-pressure die casting filling control is verified by using mathematical language, and as a result a type of control system named CLP- I has been designed. Through"cold" experiments and "on spot" application, it is confirmed that the theory developed in this paper is correct and the system designed is successful.
摘要:Various methodes of heat treatment of the die casting dies are described. Through a lot of testings especialy moulding and quenching, a feasible method of heat treatment is discovered according to theoretical investingations. The service life of the die may be increased doubly, if the factor between hardness and tenacity is corresponded with the test condition.