Manufacturing method for functionally gradient material capable of reinforcing tuyere

A technology of functionally graded materials and manufacturing methods, applied in the direction of tuyere, manufacturing tools, metal material coating process, etc., can solve the problems of inconvenient tuyere size forming, peeling, tuyere deformation, etc., and reduce thermal stress cracking or shedding. Trend, improve service life, and satisfy the effect of production efficiency

Inactive Publication Date: 2015-03-11
武汉钢铁有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large input heat of fusion welding, the accumulation of heat during multi-layer surfacing makes the tuyere easy to deform, and the size of the tuy...

Method used

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  • Manufacturing method for functionally gradient material capable of reinforcing tuyere
  • Manufacturing method for functionally gradient material capable of reinforcing tuyere
  • Manufacturing method for functionally gradient material capable of reinforcing tuyere

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Embodiment Construction

[0026] The invention adopts the surfacing welding+spraying technology to prepare the blast furnace copper matrix tuyere reinforcement layer, which can greatly improve the service life of the copper matrix tuyere. The annual consumption of blast furnace tuyere before the applicant adopts the present invention: 10*12 / 3=40 (pieces), and the annual consumption of blast furnace tuyere after adoption: 10*12 / 8=15 (pieces); annual average Consumption is reduced by almost 60%.

[0027] Concrete steps of the present invention are as follows:

[0028] First, purify the reinforced surface of the copper matrix tuyere, and preheat to 500±50°C.

[0029] Surfacing a layer of nickel-copper alloy Ni202 on the tuyere 2 of the copper substrate as the transition layer 1 of the functionally graded material. The composition of the nickel-copper alloy Ni202 is C≤0.15, Mn≤4, Si≤1.5, Ni 62-69, Fe≤2.5, Ti≤1, Nb≤2.5, S≤0.015, P≤0.02, Al≤0.75, Cu balance.

[0030] Nickel-copper alloy material Ni202 (US...

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Abstract

The invention relates to a manufacturing method for a functionally gradient material capable of reinforcing a tuyere. The manufacturing method comprises the following steps: firstly, cleaning oil stain and dust on the inner wall and the small end of the copper matrix tuyere, and pre-heating to about 500 DEG C; overlaying a Ni202 transition layer on the copper matrix tuyere; overlaying a CoGrW reinforcing layer on the transition layer; performing sandblast texturing treatment on the reinforcing layer for enabling the surface to be flat, wherein the whole overlaying layer is 3 mm in thickness; plasma-spraying a ZrO2 thermal barrier coating with the thickness of 0.5 mm after the CoGrW reinforcing layer is preheated, in order to prevent the phenomenon that cracks exist in the CoGrW reinforcing layer during the use due to the different heat conductivity coefficient. According to the invention, the transition layer and the reinforcing layer are overlaid, the thermal barrier coating is plasma-sprayed, and the overlaying layer can reach the thickness and metallurgical bonding strength required for use, so that falling can be prevented during the use, the copper matrix tuyere can be protected by the thermal barrier coating during use, the cracking or falling of the reinforcing layer caused by thermal stress is reduced, the hardness is high, the abrasion resistance is excellent, the cost is low, the production efficiency is high, and the service life can reach 10 months.

Description

technical field [0001] The invention relates to the technical field of low-alloy high-strength steel plate production, and mainly relates to a method for manufacturing a novel functionally graded material for blast furnace tuyere strengthening. Background technique [0002] The tuyere is a key spare part in the blast furnace smelting pig iron production. The working environment of the blast furnace tuyere is severe. It is located in the high-temperature furnace hearth above 2000 °C and bears the radiation and convective heat shock in the high temperature area. The front end of the tuyere is subjected to liquid slag iron and Scoured by hot materials in high-speed circulation, hot air at 900°C-1300°C passes through the tuyere, and at the same time, it is subjected to strong oxidation and infiltration of trace elements in the tuyere in the combustion cycle area. The high-speed wear of the powder, these unfavorable factors have aggravated the damage of the tuyere. [0003] The ...

Claims

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Application Information

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IPC IPC(8): C21B7/16C23C4/12C23C4/10C22C19/03C22C19/07B23P15/00B23K35/30C23C4/11C23C4/134
CPCB23K9/042B23K9/173B23K35/3033B23K35/3046B23P15/00C21B7/16C22C19/002C22C19/03C22C19/07
Inventor 陆隆文赵思胡坚张海鸥王桂兰钟毅董汉东李向伟陈畏林张正东
Owner 武汉钢铁有限公司
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