摘要
运用差压铸造原理,在稳压结晶的基础上,选择合理的工艺参数,改变其补压速度及结晶压力,把快速补压工艺运用到砂型差压铸造中,从而获得优质铸件。
This article elaborates the successful use of quickly adding supplement pressure technology from theory to practice which is used in the counter——pressure cast process. According to the principle of conter-pressure cast and on the bae of traditional steady pressure crystal technology, aiming at the improvement of its disadvantages, the article advances a new concept that is quickly adding supplement pressure technology used in the counter-pressure cast process. The effects of the technology on eliminating cast defecats and changing the solidification process and the structure of the alloy are theoretically analysed and technically tested. When the technology adapts 0. 002-0. 003 5 MPa/s as the rate of increasing pressure and 0. 08-0.12 MPa as the crystal pressure, the finished-product-rate of castings may be arrived more than 85% and the combining mechanical properties can be advanced 9%. The result shows that the technology has a notable effect to advance the quality of castings.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
1998年第S1期31-33,共3页
Special Casting & Nonferrous Alloys
关键词
快速补压
差压铸造
结晶压力
Counter-Pressure, Casting, Quick Supplement Pressure, Crystal-Pressure
