论文部分内容阅读
在磨蚀工作条件下,耐磨白口铁的使用寿命要比钢110F13Л和碳素钢长4～9倍,但在冲击负荷很大时容易碎裂,所以研制了钢-耐磨铸铁的复合铸件生产工艺。其基本方法是在韧性钢的基体金属表面镶以耐磨的白口合金铸铁。镶件按一定的方式(呈棋盘式,平行排列等)布置。根据零件的类型及其工作条件——破碎物的种类及大小、撞击角、料粒的流速来确定镶件的布置方式。耐磨镶件的布局应使破碎部分的通路最小。要破碎的块料愈大,镶件间的距离也就愈大;若撞击角增大,耐磨镶件的排列应愈密。经验指出,耐磨镶件的安装与破碎块料的流动方向呈直角时效果最好。复合铸件的制造是将钢水浇入事先装在铸型内的耐磨白口铸铁镶
Under the abrasive working condition, the service life of wear-resistant white iron is 4 to 9 times longer than that of steel 110F13 and carbon steel, but it is easy to be cracked when the impact load is very large. Therefore, the composite castings of steel-wear- Production Process. The basic method is to wear the wear-resistant white cast iron on the base metal surface of ductile steel. Inserts according to a certain way (chessboard, parallel arrangement, etc.) layout. According to the type of parts and their working conditions - the type and size of broken objects, impact angle, particle flow rate to determine the arrangement of inserts. The wear inserts should be laid out to minimize the path of the broken part. Broken pieces to be larger, the greater the distance between the inserts; if the impact angle increases, the arrangement of wear-resistant inserts should be more dense. Experience has shown that wear-resistant insert installation and crushing block flow direction at right angles to the best results. The manufacture of composite castings is the pouring of molten steel into wear-resistant white cast iron inserts pre-installed in the mold