Steel for heavy-truck super-thick steel-made spokes and manufacturing method of steel

Abstract

The invention relates to the technical field of steel rolling, and relates to steel for heavy-truck super-thick steel-made spokes and a manufacturing method of steel. The steel comprises the following trace elements in percent by mass: carbon, 0.07~0.12%; silicon, 0.05-0.15%; manganese, 0.7-1.1%; niobium, 0.01-0.03%; titanium, 0.01-0.03%; phosphor, <=0.015%; sulfur, <=0.005%; aluminium, 0.02-0.05%; and nitrogen, <=0.006%. The manufacturing method comprises: performing KR desulphurization and LF-method processing to obtain casting blanks, performing rough rolling and finish rolling, and performing laminar flow cooling and reeling to obtain the needed steel. By utilizing smelting to obtain the casting blanks with the above trace-element mass percentages and employing the technologies of low-temperature heating, low-temperature rolling and high-temperature reeling, the demands of heavy-truck spokes on easy spinning property, surface quality and performance stability are satisfied, and the collapsing crushing rate of heavy-truck wheels is substantially reduced.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a steel for heavy truck ultra-thick steel wheel spokes and a manufacturing method thereof. Background technique [0002] With the continuous increase of logistics costs, the profit margin of the heavy-duty truck transportation industry is shrinking, which leads to the serious overload of heavy-duty trucks. According to statistics, more than 80% of road traffic accidents related to trucks are caused by overloaded transportation. Once an accident occurs, it will bring huge threats and losses to people's property and personal safety. However, controlling overloading is a systematic project, which involves many departments and fields such as vehicle production, modification and management, transportation market and management system. The situation is intricate and the governance is quite difficult. Therefore, it is becoming more and more necessary for relevant tec...

AI Technical Summary

Problems solved by technology

[0004] However, the production and processing of ultra-thick and heavy-duty steel spokes requires complex spinning deformation, which leads to a large thickness reduction in some parts

Cracks are prone to occur during spinning, which not only wastes resources but also affects the production rhythm. The materials that need to be processed have good cold processing performance; in addition, as the competition in the automotive industry becomes more and more fierce, OEMs have higher and higher requirements for the aesthetics of wheels. In other words, the raw material should have good surface quality; moreover, due to the randomness of the spoke blanking, the spinning equipment adopts uniform process parameters. In order to ensure the stability of the spoke forming process, the mechanical properties of the raw steel coil stability is crucial

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