Non-quenched and tempered steel for transmission system of construction machinery and manufacturing method

Abstract

The invention provides non-quenched and tempered steel for engineering machinery and truck drive systems and a manufacturing method of the non-quenched and tempered steel. The carbon content of the non-quenched and tempered steel is 0.38-0.44% (weight); the silicon content is 0.2-0.4% (weight); the manganese content is 1.4-1.6% (weight); the sulphur content is 0.045-0.075% (weight); the chromium content is 0.2-0.6% (weight); the vanadium content is 0.01-0.08% (weight); the niobium content is 0.01-0.03% (weight); the titanium content is 0.01-0.03% (weight); the molybdenum content of the non-quenched and tempered steel is greater than 0.2% (weight); the phosphorus content is 0.03% (weight); the copper content is greater than 0.3% (weight); and the nickel content is greater than 0.2% (weight). According to the non-quenched and tempered steel for engineering machinery, and truck drive systems and the manufacturing method of the non-quenched and tempered steel, not only does the intensity of the non-quenched and tempered steel reach the level of quenched and tempered steel, but also the fatigue strength of the non-quenched and tempered steel far surpasses that of the quenched and tempered steel.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a non-quenched and tempered steel used in a transmission system of construction machinery and a manufacturing method thereof. Background technique [0002] Based on the requirements for parameters such as strength and wear resistance, most of the components of the transmission system of large construction machinery and trucks are currently made of steel. As the power of modern construction machinery products increases, the weight of the mechanical structure also increases. The increase in weight will affect the flexibility of the mechanical structure. In order to effectively reduce the weight of the mechanical structure, it is necessary to use new materials with high strength and light weight. The use of high-strength and lightweight materials can improve the overall operating performance of parts, reduce power loss, increase the output power ratio accordingly, and improve...

AI Technical Summary

Problems solved by technology

At present, non-quenched and tempered steel has been widely used in the field of passenger cars, but due to the constraints of cost and other factors, its application in construction machinery and trucks has not yet been popularized

Especially in China, due to the limitation of metallurgical quality and manufacturing level, there is currently no non-quenched and tempered steel suitable for construction machinery and truck transmission systems

Images