Plain carbon steel and wear-resistant steel clad steel plate and production method thereof

A composite steel plate and production method technology, applied in temperature control, metal rolling, etc., to achieve the effects of good composite effect, excellent strength and toughness, improved wear resistance quality and service life

Inactive Publication Date: 2016-03-02
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a common carbon steel and wear-resistant steel composite steel plate and its producti...

Method used

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  • Plain carbon steel and wear-resistant steel clad steel plate and production method thereof
  • Plain carbon steel and wear-resistant steel clad steel plate and production method thereof
  • Plain carbon steel and wear-resistant steel clad steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The chemical composition of steel base material Q235B in this experiment is C: 0.15%, Si: 0.25%, Mn: 0.8%, P: 0.015%, S: 0.01%, and the balance is Fe and unavoidable impurity elements. The wear-resistant layer NM360 is composed of C: 0.16%, Mn: 1.6%, Si: 0.30%, and also contains Cr: 0.5%, Ni: 0.6%, Mo: 0.5% and other alloying elements to increase wear resistance. The steel plate specification is: (8+6)×2040×12000mm (thickness×width×length), among which the thickness of Q235B is 8mm, and the thickness of NM360 is 6mm.

[0020] The production method includes forming billets, heating, controlled rolling, and water cooling, specifically;

[0021] (1) The steel billets smelted according to the chemical composition are designed and smelted for billet rolling; the carbon steel Q235B intermediate billet has a thickness of 60mm, and the wear-resistant steel intermediate billet has a thickness of 45mm. Use a milling machine to clean the surface of the composite surface, and add a...

Embodiment 2

[0028] The chemical composition of steel base material Q235B in this experiment is C: 0.15%, Si: 0.25%, Mn: 0.8%, P: 0.015%, S: 0.01%, and the balance is Fe and unavoidable impurity elements. The wear-resistant layer NM400 is composed of C: 0.16%, Mn: 1.7%, Si: 0.30%, and also contains Cr: 0.7%, Ni: 0.8%, Mo: 0.6% and other alloying elements to increase wear resistance. The steel plate specification is: (15+5)×2060×12000mm (thickness×width×length), among which the thickness of Q235B is 15mm, and the thickness of NM400 is 5mm.

[0029] The production process includes billet assembly, heating, rolling, air cooling and heat treatment, specifically;

[0030] (1) The steel billets designed and smelted according to the chemical composition are subjected to billet rolling; the carbon steel Q235B billet thickness is 110mm, and the NM400 middle billet thickness is 36mm. Use a milling machine to clean the surface of the composite surface, add a spacer between Q235B, and then clean the b...

Embodiment 3

[0037] The chemical composition of steel base material Q235B in this experiment is C: 0.15%, Si: 0.25%, Mn: 0.8%, P: 0.015%, S: 0.01%, and the balance is Fe and unavoidable impurity elements. The wear-resistant layer NM400 is composed of C: 0.16%, Mn: 1.7%, Si: 0.30%, and also contains Cr: 0.7%, Ni: 0.8%, Mo: 0.6% and other alloying elements to increase wear resistance. The steel plate specification is: (20+6)×2060×12000mm (thickness×width×length), of which the thickness of Q235B is 20mm, and the thickness of NM400 is 6mm.

[0038] The production method includes billet assembly, heating, rolling, air cooling and heat treatment, specifically;

[0039](1) The steel billets designed and smelted according to the chemical composition are subjected to billet rolling; the carbon steel Q235B billet thickness is 140mm, and the NM400 middle billet thickness is 45mm. Use a milling machine to clean the surface of the composite surface, add a spacer between Q235B, and then clean the billet...

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Abstract

The invention relates to a plain carbon steel and wear-resistant steel clad steel plate and a production method thereof and belongs to the technical field of metal clad plate production. Plain carbon steel meets the requirement of GBT700-2006, wear-resistant steel meets the requirement of GBT24186-2009, and an isolation agent comprises MgO and Al2O3. A smelted plain carbon steel billet and a smelted wear-resistant steel billet are break-down rolled, the four edges of each billet are welded and sealed, and vacuumization is performed; after being rolled, the billets with heat are put into water or cooled in the air; and the water entering temperature is controlled between 780 DEG C and 820 DEG C, and an air-cooled plate is subjected to offline quenching and tempering heat treatment. The steel plate has the advantages that the wear-resistant quality of the wear-resistant plate is improved, the service life of the wear-resistant plate is prolonged, and important significance in energy conservation, energy consumption reduction and the like is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal composite plate production, and in particular relates to a composite steel plate of ordinary carbon steel and wear-resistant steel and a production method thereof. It is suitable for wear-resistant parts such as coal hoppers, mine car bodies and scour tanks of hydropower stations. Background technique [0002] In view of the repeated friction of coal slag and slag and the erosion of sediment in coal hoppers and car hoppers, ordinary carbon steel cannot meet the requirements for use, and wear-resistant steel with high surface hardness is required. However, high-hardness wear-resistant steels often have high carbon content. While having high strength and high hardness, they have poor plasticity and toughness, poor processing and forming performance, difficult overall molding, and cracks. Therefore, at present, for parts with wear-resistant requirements such as car bodies, a layer of wear-resistant ma...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B37/74C22C38/60C22C38/04C22C38/12C22C38/08C22C38/18
CPCB21B1/38B21B37/74B21B2001/386C21D2211/005C21D2211/009C22C38/04C22C38/08C22C38/12C22C38/18C22C38/60
Inventor 王小勇刘建明隋鹤龙孙启昆王东马长文顾林豪王海宝
Owner SHOUGANG CORPORATION
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