A kind of high-strength cylinder liner and its preparation method and ferroalloy

Abstract

The invention belongs to the field of metal materials, and particularly relates to a high-strength cylinder sleeve, a preparing method of the cylinder sleeve and an iron alloy. The iron alloy comprises following components including, by weight, 2.8% to 3.4% of C, 0% to 0.1% of S, 1.5% to 2.5% of Si, 0.1% to 0.4% of P, 0.5% to 0.8% o Mn, 0.1% to 0.4% of Cr, 0.2% to 0.5% of Mo, 0.2% to 0.5% of Cu and Ni and the balance Fe. Through optimized design of all element contents in the cylinder sleeve, the cylinder sleeve has the higher tensile strength and the lower hardness, and the requirement of a modern high-speed racing engine for the high tensile strength and the low hardness of the cylinder sleeve is met.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-strength cylinder liner, a preparation method thereof and an iron alloy. Background technique [0002] The car engine is the engine that provides power for the car. It is the heart of the car and affects the power, economy and environmental protection of the car. According to different power sources, automobile engines can be divided into diesel engines, gasoline engines, etc. [0003] The cylinder block of automobile engine is divided into cast iron and cast aluminum. Cast aluminum engines have the advantages of light weight and good heat dissipation, and have been widely used in the industry. However, their mechanical properties, wear resistance, and thermal stability are not as good as those of cast iron. For this reason, the industry currently adopts the method of casting aluminum cylinder block and cast iron insert to solve this problem. The cast iron inse...

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