Casting method of diesel engine cylinder block

Abstract

The invention discloses a casting method of a diesel engine cylinder block. The method comprises the following steps of: weighing raw materials in portion by weight: 25-32 percent of cast iron, 25-32 percent of waste water, 15-25 percent of foundry returns, 5-8 percent of rare earth ferroalloy, 1.7-2.0 percent of silicon iron, 0.2-0.24 percent of recarburizer, and 5-10 percent of manganese iron, wherein the materials are totally 100 percent; controlling chemical components to be as followed: 2.83-3.2 percent of C, 1.0-1.3 percent of Si, 0.6-1.0 percent of Mn, 0.8-1.0 percent of P, 0.03-0.09 percent of S, 8-15.5 percent of Si, 0.27-0.33 percent of Cr, 0.01-0.02 percent of Sn, and 0.8-1.2 percent of Cu; heating to the temperature of 1400-1600 DEG C; melting to form metal liquid; detecting contents of the chemical components; adding corresponding absent metal elements in the metal liquid; uniformly mixing to form pouring liquid; and finally, casting, cooling to carry out solidification, and carrying out steam processing after taking out so as to obtain the diesel engine cylinder block. According to the casting method, a formula of the raw materials is reasonable; the process is simple; the obtained diesel engine cylinder block has good performance, long service life and high qualified rate; the product quality is greatly improved, and the casting method is suitable to be widely popularized.

Description

technical field [0001] The invention relates to the field of casting, in particular to a casting method of a diesel engine cylinder block. Background technique [0002] At present, the casting process of diesel engine cylinder block mainly adopts conventional casting, which is often accompanied by the disadvantages of complicated process, low pass rate and short service life of the product. Contents of the invention [0003] The object of the present invention is to provide a casting method for a diesel engine cylinder block. The composition of the present invention is reasonable in raw material formula and simple in process. Promote widely. [0004] The present invention adopts following technical scheme: [0005] A casting method for a diesel engine cylinder block, comprising the following steps: [0006] (1) According to the weight ratio of raw materials, pig iron is 22-33%, recycled material is 20-25%, scrap steel is 22-25%, rare earth ferroalloy is 6-10%, aluminum ...

AI Technical Summary

Problems solved by technology

[0002] At present, the casting process of diesel engine cylinder block mainly adopts conventional casting, which is often accompanied by the disadvantages of complicated process, low pass rate and short service life of the product.