Casting technique of imbedding type composite hammerhead

Abstract

The invention discloses a casting technique of an imbedding type composite hammerhead, which is the technique for bonding a wear resistant material with a substrate during the solidification of a cast by using the heat of molten metal; the production technique of the hammerhead comprises the following steps: pre-forming a hammer handle, polishing to remove surface impurities, smoothening corner angles, coating protective agent, covering a hammer end evanescent mode, putting into a mould cavity and then filling with sands for moulding; taking out the hammer end evanescent mode after the sands are compact, setting a feeding riser runner on the top of the hammer end, wherein the evanescent modes are adopted in the hammer end, sprue base and ingate, and wood former moulds are adopted in riser, riser neck and sprue; arranging the whole sand mould 3-8J into an induction coil before composting, pre-heating the hammer handle by electromagnetic induction heating principle, starting to cast molten metal when the hammer handle reaches a needed temperature, heating while casting, stopping heating after the mould cavity of the hammer end is full, keeping on casting until the whole riser is full; the technique has the following beneficial effects: (1), by utilizing the in-mould induction heating in the hammer handle, the heating efficiency is high; (2), the atomic diffusion energy is improved; (3) the metal atoms exchanging rate of molten metal and solid surface layer is enhanced; and (4), the location accuracy and size precision of workpiece are guaranteed, the production efficiency is improved, and the working condition is improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of alloy cast iron casting, and in particular relates to a casting process of an inlay-cast composite hammer head. [0003] Background technique [0004] The production of hammer heads mostly adopts inlay casting process, which has low operating cost and superior comprehensive performance of castings, which is a kind of close-to-body process. However, most of the existing inlay casting processes still have the following problems: the temperature must be fixed during the hammerhead compounding process to form an effective metallurgical bond. In order to solve the problem of how to reach the predetermined temperature, we designed a casting-type composite hammer head technology-in-mold induction heating composite casting process, which has worked well since it was put into production. The heating process currently used in production can be attributed to: one is to preheat the solid part of the cas...

AI Technical Summary

Problems solved by technology

However, most of the existing inlay casting processes still have the following problems: the temperature must be fixed during the hammer head compounding process to form an effective metallurgical bond

In actual use, the crack spreads, causing the hammer end to break and fall off.