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Method for surfacing high-temperature-resistant wear-resistant hard alloy on surface of blow-in drill bit cutting edge of steel mill

A surface surfacing and hard alloy technology, applied in welding equipment, metal processing equipment, plasma welding equipment, etc., can solve the problems of short service life and low efficiency

Active Publication Date: 2022-02-25
福尼斯(南京)表面工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the drill bit used in steel mills usually has a short service life. Generally, it can be scrapped after only one furnace is fired, and the efficiency is low. The scrapped form is peeling and edge collapse.

Method used

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  • Method for surfacing high-temperature-resistant wear-resistant hard alloy on surface of blow-in drill bit cutting edge of steel mill
  • Method for surfacing high-temperature-resistant wear-resistant hard alloy on surface of blow-in drill bit cutting edge of steel mill
  • Method for surfacing high-temperature-resistant wear-resistant hard alloy on surface of blow-in drill bit cutting edge of steel mill

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] The method for overlaying the surface of the cutting edge of the furnace-opening drill bit in the steel plant of the present invention is high-temperature-resistant and wear-resistant cemented carbide, comprising the following steps:

[0029] 1) Selection of bonding phase: High-temperature cobalt-based bonding phase is used as the high-temperature resistant bonding phase, and the bonding phase includes the following components in mass percentage: C (2.6-3.0), Cr (30-33), Si (1.0- 2), W(14-17), Fe(<3), Mo(3-5), Ni(3.5-4.0), Mn(0.7-1.2), Co(balance), alloy hardness greater than 55HRC, at 800 It has wear resistance in high temperature environment;

[0030] 2) Selection of hard phase: WC with a hardness of 1800HRC is used as the hard phase for abrasive wear. The hard phase includes the following components in mass...

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Abstract

The invention discloses a method for surfacing high-temperature-resistant wear-resistant hard alloy on a surface of a blow-in drill bit cutting edge in a steel mill. The method comprises the following steps: 1) selecting a bonding phase; 2) selecting a hard phase; 3) preparing before welding; 4) editing a welding program; and 5) executing the welding process and the like. According to the high-temperature-resistant wear-resistant hard cobalt-based tungsten carbide alloy and the preparation method thereof, double-path powder feeding mixed welding is adopted, electric arc mixed powder material alloying during welding is achieved, a high-temperature cobalt base is adopted as a high-temperature-resistant bonding phase, WC with the hardness being 1800 HRC is adopted as the hard phase for abrasive particle wear, and the high-temperature-resistant and wear-resistant hard cobalt-based tungsten carbide alloy is obtained.

Description

technical field [0001] The invention relates to the field of welding, in particular to a method for surfacing welding of high-temperature-resistant and wear-resistant cemented carbide on the cutting edge of a furnace-opening drill in a steel factory. Background technique [0002] The furnace opening drill bit in the steel factory is in the form of a percussion drill when it is actually used. It rotates and impacts in the furnace wall, breaking down the furnace wall and releasing the molten iron. Furnace welding technology has never been used in the furnace drill bits of steel mills in the prior art. Generally, the finished alloy YGB hard alloy block is mechanically occluded on the cutting edge surface by brazing. In the prior art, the drill bits used in steel mills are usually short in service life. Generally, they will be scrapped after only one furnace is fired, and the efficiency is low. The scrapping forms are peeling and edge collapse. Contents of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K10/02
CPCB23K10/027
Inventor 孙骞杨修荣马策杨献盛欧世彩
Owner 福尼斯(南京)表面工程技术有限公司
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