Composite piston material containing nickel and preparation method thereof

Abstract

The invention discloses a composite piston material containing nickel which is prepared from the following raw materials in parts by weight: 4.5-5.5 parts of silicone powder, 0.4-0.48 part of magnesium powder, 0.02-0.05 part of titanium powder, 0.1-0.2 part of nickel powder, 5-6 parts of silicon carbide powder, 2.2-2.8 parts of molybdenum disulfide, 0.3-0.6 part of thulium powder and 90-95 parts of aluminum powder. The invention also discloses a preparation method of the composite piston material containing nickel. The preparation method comprises the following steps: (1) weighing raw materials; (2) ball-milling, screening and mixing the silicone powder, the magnesium powder, the titanium powder, the nickel powder, the thulium powder and the aluminum powder; (3) heating and insulating thesilicon carbide powder, and carrying out a reaction with oxygen fully to form silicon dioxide in the surface layer; and (4) heating, degassing, insualting and cooling the mixed raw materials, then adding molybdenum disulfide and silicon carbide, and stirring the mixture. By adding alloy elements which are relatively large in influence on high-temperature performance and wear resistance in a certain proportion to adjust the proportion, the high-temperature strength and wear resistance of the material are improved.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a nickel-containing composite piston material and a preparation method thereof. Background technique [0002] The piston is called the heart of the engine. It is subjected to continuous alternating mechanical and thermal loads during the working process of the engine. It is the key part with the worst working conditions in the engine. Since the piston works under high temperature, high pressure and high speed conditions, the material used for the piston must have high high temperature strength and good wear resistance to maintain the stable working efficiency of the engine. [0003] The main piston materials currently used are high temperature resistant aluminum alloys, cast iron and cast steel materials. Among them, the high temperature resistant aluminum alloy is the most widely used. However, with the development of trucks, railway locomotives and marine engines toward...

AI Technical Summary

Problems solved by technology

However, with the development of trucks, railway locomotives and marine engines towards high power, high load and strict emission requirements, the existing high temperature resistant aluminum alloys have become more and more difficult to meet the needs

However, the density of cast iron and cast steel is too high to meet the comprehensive performance requirements of modern high-efficiency engines for pistons