双金属内衬套反向浇铸装置的设计与工艺研究

Design and Process Research of Reverse Casting Device for Bimetallic Inner Bushing Base

采用在钢管内壁直接浇铸的方法可以实现在钢管内壁制备耐磨金属层,但在浇铸过程中,高温金属液对钢管腐蚀速度快,造成钢管腐蚀穿孔,导致工艺难以控制,并且制备的金属层中存在大量的气孔,无法满足使用要求。为解决腐蚀穿孔与残留气孔问题,引入了TRIZ理论,采用因果链分析方法建立了浇铸装置的功能模型,找到了浇铸装置存在的问题。结果表明,采用技术冲突法设计并开发了快速反向浇铸装置,减少金属液腐蚀时间,消除了金属层中的残留气孔,并进行工艺设计,实现了快速连续生产,制备了满足要求的带有内壁耐磨涂层的双螺杆挤出机整体式双金属内衬套。

The method of direct casting on the inner wall of the steel tube can be used to prepare the wear-resisting metal layer. However, in the process of casting, the high temperature liquid metal corroded the steel tube quickly, resulting in corrosion and perforation of the steel tube, which made the process difficult to control. In addition, there were a large number of pores in the prepared metal layer, which cannot meet the requirements of use. In order to solve the problem of corrosion perforation and residual porosity, TRIZ theory was introduced, and the functional model of casting device was established by causal chain analysis method. The results show that the technical conflict law is designed and developed a rapid reverse casting device, reduce the liquid metal corrosion time, eliminate the residual porosity in the metal layer, and process design in order to realize the continuous production quickly, meet the requirements with the lining wear-resistant coating is prepared by the set of twin screw extruder and double metal liner.