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Method for surfacing high-hardness wear-resistant layer on blow-in drill bit

A wear-resistant layer and high-hardness technology, which is applied in the direction of drill bits, welding equipment, welding media, etc., can solve the problem of cemented carbide block falling off, and achieve the effects of increased bonding strength, improved wear resistance and hardness, and low cost

Active Publication Date: 2021-08-06
桂林市中锐特机械制造有限责任公司
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Problems solved by technology

[0007] Purpose of the invention: Aiming at the deficiencies and defects of the prior art, the present invention provides a method for surfacing a high-hardness wear-resistant layer on a furnace drill bit, which can effectively solve the problem that the cemented carbide block is likely to fall off in the prior art at 800°C , through two-way powder feeding and arc powder mixing, the wear-resistant layer of "cobalt-based superalloy + tungsten carbide WC" is added to the surface of the drill tooth by overlay welding, so as to improve the wear resistance and service efficiency of the drill bit

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  • Method for surfacing high-hardness wear-resistant layer on blow-in drill bit
  • Method for surfacing high-hardness wear-resistant layer on blow-in drill bit
  • Method for surfacing high-hardness wear-resistant layer on blow-in drill bit

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] A method for surfacing a high-hardness wear-resistant layer for an open-furnace drill bit of the present invention comprises the following steps:

[0030] 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 also has wear resistance in high temperature environments.

[0031]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 percentage: W (95-96), LC (3.8-4.1); The mass ratio of phase to binder phase is 1...

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Abstract

The invention discloses a method for surfacing a high-hardness wear-resistant layer on a blow-in drill bit. The method comprises the steps of (1) selection of a bonding phase, (2) selection of a hard phase, (3) preparation before welding, (4) editing of a welding program, (5) setting of welding parameters and (6) execution of the welding process. The problem that in the prior art, a hard alloy block is prone to falling off at the temperature of 800 DEG C can be effectively solved, the wear-resistant layer formed by combining cobalt-based high-temperature alloy and tungsten carbide WC is added on the surface of drill teeth of the drill bit in a surfacing mode through the modes of double-way powder feeding and electric arc powder mixing, and the wear resistance and the use efficiency of the drill bit are improved.

Description

technical field [0001] The invention relates to the field of welding, in particular to a method for surfacing a high-hardness wear-resistant layer on a furnace drill bit. Background technique [0002] At present, furnace opening drills are used to tap molten iron on the high-temperature furnace wall of steel mills. Furnace opening drills are divided into ball head inlaid round teeth and cross-shaped inlaid teeth. In the market, the cross type accounts for about 95%, and the spherical tooth type accounts for 5%. It is mainly based on the insert YG8, and the main components of YG8 are 92% WC and 8% cobalt. The furnace drill bits of the prior art mainly have the following problems in use: [0003] 1. YG8 cemented carbide fails during manufacture, and there are two ways to connect the cross-shaped, ball-tooth drill and YGB: [0004] One is to use 506 electrode, CO 2 Gas shielded welding, which welds YG8 alloy to the drill bit, has the following disadvantages: due to the high ...

Claims

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Application Information

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IPC IPC(8): B23K10/02B23K35/30
CPCB23K10/027B23K35/3046B23K2101/002Y02P10/20
Inventor 罗沛颖尹文清罗俊容姚国亮孙骞
Owner 桂林市中锐特机械制造有限责任公司
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