High-strength environment-friendly wear-resistant coating for inner wall of internal combustion engine cylinder and preparation method of coating

Abstract

The invention provides a high-strength environment-friendly wear-resistant coating for the inner wall of an internal combustion engine cylinder and a preparation method of the coating. The coating is characterized by being prepared from the following raw materials in parts by weight: 60-64 parts of 316 stainless steel powder, 5-5.2 parts of Mo powder, 3.5-3.7 parts of NiCr alloy powder, 20-22 parts of Ni60 powder, 5-10 parts of titanium dioxide, 4-9 parts of graphene, 1.3-1.5 parts of yttrium oxide, 2.3-2.5 parts of nano potassium-sodium niobate, 2.1-2.3 parts of phosphate carbonyl iron powder, 3.1-3.3 parts of lanthanum ferrite, 1.2-1.4 parts of molybdenum boride, 0.2-0.4 part of gallium chloride, 0.4-0.6 part of sodium silicate, 0.5-0.7 part of lithium titanate, 1.4-1.8 parts of TiH2, 9.2-9.6 parts of sodium molybdate powder, 4.3-4.7 parts of acetic anhydride, 85-89 parts of dimethyl formamide, 175-186 parts of concentrated hydrochloric acid and 9-13 parts of tetrabutylammonium bromide.

Description

technical field [0001] The invention relates to the technical field of coatings on the inner walls of automobile cylinders, in particular to an environmentally friendly and wear-resistant coating on the inner walls of high-strength internal combustion engine cylinders and a preparation method thereof. Background technique [0002] Energy saving and emission reduction has become the ultimate goal of global auto companies. According to data, in the emission of air pollutants, CO accounts for 66%, NOx accounts for 43%, HC accounts for 31%, CO 2 33% of air pollution and 20% of particulate matter come from vehicle emissions. The lightweight of automobiles is very important to save energy and reduce exhaust emissions. The use of aluminum alloy internal combustion engines to gradually replace traditional cast iron internal combustion engines is one of the main ways to save energy and reduce emissions. However, because the strength and stiffness of aluminum alloy are lower than t...

AI Technical Summary

Problems solved by technology

For the combustion chamber composed of the cylinder and piston of an internal combustion engine, the cylinder liner and piston not only work under high temperature and pressure, but also bear the sulfide (SO 2 , SO 3 ) and the water vapor generated during combustion and the inhaled air form sulfuric acid and sulfurous acid to cause serious corrosion, while stainless steel has become a kind of aluminum alloy cylinder with its excellent corrosion resistance, high mechanical properties and thermal stability. The preferred coating preparation material for inner wall surfaces, but its wear resistance is not yet sufficient for the application