Hot-rolled steel for automobile wheel rim and its production process

Abstract

The invention provides hot rolled steel for a vehicle wheel steel ring, which comprises the following chemical components in percent by weight: 0.06-0.12 percent of C, not more than 0.10 percent of Si, 0.30-0.70 percent of Mn, not more than 0.030 percent of P, not more than 0.020 percent of S and 0.010-0.060 percent of Al. A production process of the hot rolled steel comprises the steps of: LF (Low Frequency) external refining on molten steel meeting the requirement of the chemical components and being obtained through smelting, slab continuous casting, heating of a step type heating furnace, continuous casting of a 2032mm hot continuous casting unit, laminar flow cooling, coiling, checking, storing and delivering. The hot rolled steel for the vehicle wheel steel ring is suitable for cold machining forming, and meets the demands on the cold machining forming.

Description

technical field [0001] The invention relates to hot-rolled steel used for steel rims of automobile wheels and a production process of the hot-rolled steel. Background technique [0002] With the rapid development of my country's national economy, the demand for automobiles continues to increase. According to information, the production capacity of automobiles in my country reached 18 million in 2010. At the same time, the demand for automobile structural steel in the automobile industry is also increasing. . In the past, automobile manufacturers used mostly Q195, Q235, SS400 steel and other structural steels when making automobile wheel rims. Because such steels often cracked severely during the complex cold deformation process, the material utilization rate was not high. Seriously affect the quality and appearance of the car body, so manufacturers are not allowed to use hot stamping deformation to improve material utilization and product quality, but it also brings an incre...

AI Technical Summary

Problems solved by technology

In the past, when automobile manufacturers made automobile wheel rims, most of the structural steels used were Q195, Q235, SS400 steel, etc., because such steels often cracked severely during the complex cold deformation process, resulting in low material utilization. Seriously affect the quality and appearance of the car body, so manufacturers are not allowed to use hot stamping deformation to improve material utilization and product quality, but at the same time it also brings an increase in process equipment (heating furnace) and energy consumption

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