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Auger bit with abrasion resistance and toughness and preparing method thereof

A technology of wear resistance and toughness, applied in the field of rotary digging teeth and its preparation, can solve the problems of easy brittle fracture of rotary digging teeth, lower toughness of substrate, easy peeling of cladding layer, etc., to maintain overall toughness and simple operation , to ensure the effect of wear resistance

Inactive Publication Date: 2018-01-26
JIANGSU ZHONGKE DAGANG LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that the large amount of heat input brought by the cladding process leads to the accumulation of thermal stress inside the substrate, and the toughness of the substrate is reduced. Therefore, the rotary digging teeth are prone to brittle fracture during the operation process, and the cladding layer is also easy to peel off.

Method used

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  • Auger bit with abrasion resistance and toughness and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A rotary digging tooth with both wear resistance and toughness, such as figure 1 As shown, from top to bottom, it includes wear head 1, tooth body 2 and tooth shank 3. The tooth body 2 and tooth shank 3 are integrally formed, and the material is H13K (4Cr5MoSiV1). The lower end of the wear head 1 is embedded in the tooth body 2. In the wear-resistant head groove 21 at the top, the surface of the tooth body 2 is provided with dot-shaped dispersive alloy strengthened micro-regions 4, and the alloy strengthened micro-regions 4 are formed by the pulse laser melting the tooth body substrate during the subsequent rapid cooling and solidification process. It is formed by the WC reinforcement phase particles wrapped in the micro-melt pool, and the diameter of a single alloy-reinforced micro-region 4 is 1000 μm.

[0030] The rotary digging tooth with both wear resistance and toughness of this embodiment is made by the following process:

[0031] (1) Raw material (material is H13K (4...

Embodiment 2

[0046] A rotary digging tooth with both abrasion resistance and toughness is basically the same as Example 1, except that the integrally formed tooth body and tooth shank are made of 42CrMo, and the surface of the tooth body is provided with a rotary digging tooth. A spiral-shaped alloy strengthened micro-area in the height direction. The spiral-shaped micro-melt pool formed by continuous laser melting of the tooth base material wraps the WC-reinforced phase in the spiral micro-melt pool during the subsequent rapid cooling and solidification process The melting width of the spiral alloy strengthened micro-regions formed by the particles is 3mm.

[0047] The preparation method of the rotary digging tooth with both wear resistance and toughness of this embodiment is basically the same as that of embodiment 1, and the only difference is:

[0048] In step (5), the overall quenching temperature is 1000°C, the low temperature tempering temperature of the tooth handle is 250°C, and the hi...

Embodiment 3

[0051] A rotary digging tooth with both wear resistance and toughness, which is basically the same as Example 1, except that: the integrally formed tooth body and tooth shank are made of 25Cr2Mo1V, and the surface of the tooth body is provided with dot-shaped dispersion alloy strengthening micro-regions And the alloy-strengthened micro-regions spirally shaped along the height of the rotary digging tooth body. The point-shaped dispersive alloy strengthened micro-area is formed by the micro-melt pool formed by the pulse laser melting the tooth base material in the subsequent rapid cooling and solidification process, and the WC reinforcement phase particles in the micro-melt pool are wrapped. The diameter is 1000 μm. The spiral alloy strengthened micro-area is formed by the spiral micro-melt pool formed by continuous laser melting of the tooth base material, which is formed by wrapping the WC reinforcing phase particles in the spiral micro-melt pool during the subsequent rapid coo...

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Abstract

The invention discloses an auger bit with abrasion resistance and toughness. The auger bit includes an abrasion-resistant head, a bit body and a bit handle from top to bottom in sequence. The bit bodyand the bit handle are formed integratedly. The lower end of the abrasion-resistant head is inlaid in an abrasion-resistant head groove of the top end of the bit body. An alloy reinforcing micro-region is arranged on the surface of the bit body. The alloy reinforcing micro-region is formed by a micro-molten pool wrapping enhanced phase particles in the micro-molten pool in the subsequent rapid cooling and solidifying process, wherein the micro-molten pool is formed by laser melting a bit body base material. A preparing method comprises the steps that (1) raw material forging, (2) bit body vehicle outer round step, (3) abrasion-resistant head groove drilling at the top end of the bit body, (4) abrasion-resistant head brazing, (5) heat treatment, (6) shot blasting, (7) spring clamping, (8)rust removing treatment, and (9) alloy reinforcing micro-region forming on the surface of the bit body. The auger bit has surface high abrasion resistance and meanwhile further maintains overall toughness of the auger bit base material.

Description

Technical field [0001] The invention belongs to the technical field of a rotary digging tooth and its preparation, and in particular relates to a rotary digging tooth with both wear resistance and toughness and a preparation method thereof. Background technique [0002] Rotary teeth are the key operating part of the drill bit components of the rotary drilling rig. The root is connected with the drill bit, and the conical surface and cemented carbide head are used as the rotary drilling surface. Due to the strong interaction between the digging teeth and the object to be digging during the operation. The conical surface of the rotary digging tooth is easy to be worn and eventually fails. [0003] At present, the common method to improve the wear resistance of the cone surface of the rotary digging tooth is to cladding a wear layer on the surface of the cone surface to improve its wear resistance. But the disadvantage of this kind of method is that the large amount of heat input br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/43E21B10/54C23C24/10B23P15/00
Inventor 段韧徐陈成中庚赵树森陈峰
Owner JIANGSU ZHONGKE DAGANG LASER TECH
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