Method for manufacturing and tempering bainite wear-resistant steel and steel pipe

A wear-resistant steel pipe and bainite technology, which is applied in the manufacture of wear-resistant steel pipe tempering, wear-resistant steel pipe, and wear-resistant steel fields, can solve the problems of undisclosed wear-resistant steel pipe manufacturing technology, achieve low cost, and improve stability properties, the effect of high hardness value
CN102534432AInactive Publication Date: 2012-07-04TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2012-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for manufacturing and tempering bainite wear-resistant steel and steel pipe. The bainite wear-resistant steel contains the following main ingredients of: C, Mn, Si, Cr, Ni, Cu, V, Al, P, S and the balance of Fe. The method for manufacturing the bainite wear-resistant steel pipe comprises the following steps of: alloying the raw material ingredients of bainite wear-resistant steel to form an alloy, refining the alloy by using a refining furnace, forming a pipe blank by using continuous casting, then, heating up the pipe blank, carrying out heat insulation to homogenize, then, perforating, carrying out tandem rolling, and sizing; carrying out pipe-making by using on-line rolling, then, carrying out air cooling or accelerated cooling; and after air cooling or accelerated cooling, carrying out tempering and heat insulation for 1-48 hours at the tempering temperature of 180-380 DEG C. Compared with the prior art, the method has the advantages that: the occurrence of mixed-metal texture is avoided, the recrystallization is fully guaranteed after the alloy is homogenized, two difficult problems in composite pipes internationally and domestically are solved, and a pipeline formed by directly adopting the bainite wear-resistant steel pipe is pressure-proof and wear-resistant.
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Description

technical field

[0001] The invention belongs to the field of steel alloys, and in particular relates to a method for manufacturing wear-resistant steel, a wear-resistant steel pipe, and a method for manufacturing and tempering the wear-resistant steel pipe. Background technique

[0002] Wear-resistant steel pipes are widely used in electric power, metallurgy, mining, coal and other industries to transport sand, coal powder, ash and other abrasive granular materials; the working environment requires wear-resistant steel pipes to have high hardness and high toughness to obtain good wear resistance. In general, however, toughness deteriorates with increasing hardness. Composite pipelines are generally used in the international and domestic slurry transportation industries. Water and gas are generally used as power to drive material transportation for slurry transportation. The materials are of different sizes, and the pipelines must be wear-resistant and pressure-resistant. O...

Claims

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