Production process of high-nickel and high-chromium heat-resistant and abrasion-resistant vehicle chassis parts

Abstract

The invention discloses a production process of high-nickel and high-chromium heat-resistant and abrasion-resistant vehicle chassis parts and relates to the field of vehicle part machining. The production process comprises the following steps that raw materials are prepared, specifically, the raw materials comprise scrap returns and steel scraps with the weight ratio being 1:1, and molten liquid is obtained by melting the scrap returns and the steel scraps; the raw materials are discharged out of a furnace to a steel ladle, ferrochromium, ferronickel, ferromolybdenum, ferrosilicon and ferrotungsten are sequentially added, then an alloy line and a carburant are added into the steel ladle through a spheroidizing device, and pouring liquid is formed again in an inoculation mod; deoxidized aluminum is added into the pouring liquid, the pouring liquid is poured into a mold, and an inoculation agent is added in the pouring process; an exhaust hood and a sprue cup are removed within 3-5 min after pouring is completed, a tank is opened in another 20-24 h, the parts are pushed aside, sand shakeout treatment is conducted, and castings are obtained; and the castings are heated to form blanks,the blanks are subjected to deep processing, and accordingly the finished vehicle chassis parts are obtained.

Description

technical field [0001] The invention relates to the field of auto parts processing, in particular to a method for making auto chassis parts. Background technique [0002] After nearly 10 years of research and development and demonstration operation of new energy vehicles in my country, they basically have the basis for industrialization development. Key technologies such as batteries, motors, electronic control and system integration have made significant progress. Pure electric vehicles and plug-in hybrid vehicles have begun to grow Large-scale launch on the market, energy-saving technologies and products such as advanced internal combustion engines, high-efficiency transmissions, lightweight materials, vehicle optimization design, and hybrid power have been vigorously promoted, and the average fuel consumption of vehicles has been significantly reduced; the technology of alternative fuel vehicles such as natural gas has basically matured and initially realized industrializat...

AI Technical Summary

Problems solved by technology

[0016] The causes of thermal cracks are reflected in the process and the structure of the casting. Among them are: the wall thickness of the casting is not uniform, the inner angle is too small; Normal shrinkage of the casting, such as the casting riser close to the box belt or the strength of the sand between the pouring riser is very high, which limits the free shrinkage of the casting; the riser is too small or too large; the shrinkage rate of the alloy wire is too large; the low melting point phase is formed in the alloy The elements exceed the standard, the sulfur and phosphorus content in cast steel and cast iron is high; the castings are unpacked and sanded out too early, and the cooling is too fast