Method for producing medium-high-carbon high-strength steel based on sheet bar technology

Abstract

The invention relates to a production method of high-carbon and high-strength steel based on a thin slab process. The method adopts the technical proposal that: the steel is made by steelmaking, refining process, slab continuous casting, heating, soaking, hot continuous rolling, cooling and coiling. Wherein: the thickness of a thin slab ranges from 50 to 90mm, a continuous casting billet has a drawing speed of 2.5 to 6.0m / min, a heating furnace has a temperature of between 900 and 1100DEG C, a soaking pit has a temperature of between 1000 and 1250DEG C, the initial rolling temperature is between 1000 and 1200DEG C, the finishing temperature is between 650 and 950DEG C, the coiling temperature is between 450 and 850DEG C, and the thickness of a steel plate ranges from 1 too 12mm. The high-carbon and high-strength steel comprises the chemical constituents: 0.25 to 1.25 wt percent of carbon content, 0.001 to 0.1wt percent of Al, 0.0010 to 0.0050 wt percent of Ca, balance Fe, unavoidable impurities and one or more than one of alloying elements. The production method has advantages of good product quality, low production cost, low energy consumption and simple technical process.

Description

technical field [0001] The invention belongs to the technical field of thin slab continuous casting and rolling technology. In particular, it relates to a production method of medium-high-carbon high-strength steel based on thin slab technology. Background technique [0002] The traditional slab continuous casting and thin slab continuous casting processes are the main methods of producing thin steel plates and thin strip steel plates. The production process of ingot rough rolling and billeting has been eliminated except for the production of a very small number of high-alloy steels. Thin slab continuous casting and rolling has incomparable advantages over traditional slab continuous casting and thin slab continuous casting in terms of construction investment and production cycle. [0003] The reason why the thin slab continuous casting and rolling technology has developed so rapidly in more than ten years is that compared with the traditional hot-rolled strip production, i...

AI Technical Summary

Problems solved by technology

For the process of die casting + blooming and hot rolling, the energy consumption is high, the product quality is poor, the production cycle is long, the metal yield is low, and the environment is seriously polluted. For the conventional thick slab continuous casting + hot rolling process, it is easy to cause Carbon composition segregation and uneven performance, high energy consumption, long production cycle, low metal yield

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