引言随着机械精密化、高效化和轻型化的发展,复杂结构的薄壁高强度铸件日益增多,这不仅对铸铁强度、刚性和残余应力同时提出了更高的要求,而且还严格限定了其它的使用性能(如弹性模量、硬度)及工艺性能(如流动性、收缩率和组织均匀性等)。综合性能良好的高强度低应力铸铁即应运而生。众所周知,获得高强度、高弹性模量的 INTRODUCTION With the development of mechanical precision, high efficiency and light weight, the increasing number of thin-walled, high-strength castings with complex structures has not only put forward higher requirements on the strength, rigidity and residual stress of cast iron at the same time, but also strictly limits other The use of performance (such as elastic modulus, hardness) and process performance (such as fluidity, shrinkage and uniformity of tissue, etc.). Comprehensive performance good high-strength low-stress cast iron that came into being. It is well-known that high-strength, high-elastic modulus is obtained