B-P-T steel tube and preparation method thereof

A technology of B-P-T and steel pipes, applied in the field of high-performance and high-wear-resistant steel pipes, can solve the problems of small plasticity, deterioration of toughness, complicated process, etc., and achieve the effect of low cost, high product quality and simple process

Inactive Publication Date: 2012-10-24
攀枝花贝氏体耐磨管道有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But generally speaking, the toughness deteriorates with the increase of hardness, so X series pipeline steel is generally used at present. The steel pipe needs heat treatment process, composite wear-resistant pipe and inner wall hardening method to manufacture high-strength steel pipe, but this method is complicated. High cost, little effect on plasticity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The main components of the B-P-T steel pipe described in this embodiment are C, Mn, Si, S, P and Fe. In terms of mass percentage: C: 0.1wt%, Mn: 1.2wt%, Si: 0.1wt%, S: 0.001wt%, P: 0.001wt%, and the balance is Fe. It should be noted that some impurities will inevitably be mixed in the production process. The lower bainite wear-resistant steel pipe for slurry transportation has a performance hardness of HRC22.5, and an impact toughness of V-notch greater than 100J / cm 2 , Tensile strength 850MPa, yield strength 550MPa, elongation 20A%.

Embodiment 2

[0030] The main components of the B-P-T steel pipe described in this embodiment are C, Mn, Cr, Si, Al, S, P and Fe. In terms of mass percentage: C: 0.20wt%, Mn: 5.0wt%, Cr: 1.8wt%, Si: 3.0wt%, Al: 2.0wt%, S: 0.1wt%, P: 0.1wt%, the balance is Fe. It should be noted that some impurities will inevitably be mixed in the production process. The performance hardness of the lower bainite wear-resistant steel pipe for slurry transportation is HRC30.5, and the impact toughness V-notch is greater than 100J / cm 2 , Tensile strength 1200MPa, yield strength 800MPa, elongation 30A%.

Embodiment 3

[0032] The main components of the B-P-T steel pipe described in this embodiment are C, Mn, Cr, Si, Al, S, P and Fe. In terms of mass percentage: C: 0.25wt%, Mn: 3.1wt%, Cr: 0.9wt%, Si: 1.6wt%, Al: 1.0wt%, S: 0.05wt%, P: 0.05wt%, the balance is Fe. It should be noted that some impurities will inevitably be mixed in the production process. The performance hardness of the lower bainite wear-resistant steel pipe for slurry transportation is HRC35.5, and the impact toughness V-notch is greater than 100J / cm 2 , Tensile strength 1300MPa, yield strength 900MPa, elongation 35A%.

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Abstract

The invention discloses a B-P-T steel tube and a preparation method thereof. The steel tube comprises carbon, manganese, chromium, silicon, aluminum, sulphur, phosphorus and ferrum. The preparation method comprises steps of performing alloying for above components, producing a Bainite steel tube through a converter, refining and rolling and obtaining the B-P-T steel tube through a P process and a B process. The plastic property of the steel tube can be increased by more than 50% compared with former plastic property, the steel tube can be applied in the field of conveying of high-performance and high-abrasion steel tubes and the current technical problem of low plastic property is solved. The process is simple, the cost is low and the product quality is good.

Description

technical field [0001] The invention belongs to the field of high-performance and high wear-resistant steel pipes, and in particular relates to a bainite steel pipe and a preparation method of the steel pipe. Background technique [0002] High-strength steel pipes are widely used in electric power, metallurgy, mining, coal, petroleum and other industries to transport sand, coal powder, ash, petroleum, water, gas, etc. The harsh working environment requires high hardness, high toughness and high plasticity in order to obtain good organizational properties. But generally speaking, the toughness deteriorates with the increase of hardness, so X series pipeline steel is generally used at present. The steel pipe needs heat treatment process, composite wear-resistant pipe and inner wall hardening method to manufacture high-strength steel pipe, but this method is complicated. The cost is high and has little effect on plasticity. Contents of the invention [0003] In view of this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/38C22C38/34C22C38/58C21D8/10
Inventor 刘文利谭谆礼史庆志高古辉
Owner 攀枝花贝氏体耐磨管道有限公司
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