Abrasion-resistant excavator bucket tooth and preparation method thereof

A technology of excavator bucket teeth and weight percentage, which is applied in the field of excavator bucket teeth, can solve the problems of short life, insufficient impact force, hardening, and inability to fully exert wear resistance, so as to reduce formation and segregation, Improve the binding force and the effect of tissue compaction

Inactive Publication Date: 2018-08-17
安徽省宁国市亚晨碾磨铸件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high manganese steel has good toughness, under the working condition of low impact force, it cannot produce work hardening due to insufficient impact force, so that the wear resistance cannot be fully exerted and the service life is short.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A wear-resistant excavator bucket tooth, containing the following components in weight percentage (wt%): Mn 1.2, Si 0.6, C0.30, S 0, P 0, B 0.002, Re 0.01, Al 0.03, Cr 0.5 , Mo 0.02, the rest is Fe and unavoidable impurities.

[0025] The preparation method comprises the following steps:

[0026] (1) Pour the quartz sand into the mixer, dry mix for 2 minutes, then add water glass, and wet mix for 4 minutes. The weight ratio of quartz sand to water glass is 47:3. Mix it evenly and use it for molding. After the mold is made, Blow CO 2 Harden, paint refractory material, make mold, bake raw material and mold at 300°C for 3h;

[0027] (2) Add an air inlet to the furnace bottom of the intermediate frequency induction furnace. The air inlet is sealed and covered with air-permeable bricks. The air inlet is connected to the outlet pipe of the argon blowing device. Add pure iron and scrap steel to the intermediate frequency induction furnace to melt Then add crystalline silico...

Embodiment 2

[0032] A wear-resistant excavator bucket tooth, containing the following components in weight percentage (wt%): Mn 1.6, Si 0.9, C0.37, S 0.008, P 0.008, B 0.005, Re 0.02, Al 0.05, Cr 0.8 , Mo 0.05, the rest is Fe and unavoidable impurities.

[0033] The preparation method comprises the following steps:

[0034] (1) Pour the quartz sand into the mixer, dry mix for 3 minutes, then add water glass, and wet mix for 4 minutes. The weight ratio of quartz sand to water glass is 47:3. Mix it evenly and use it for molding. After the mold is made, Blow CO 2 Harden, paint refractory material, make mold, bake raw material and mold at 310°C for 3h;

[0035] (2) Add an air inlet to the furnace bottom of the intermediate frequency induction furnace. The air inlet is sealed and covered with air-permeable bricks. The air inlet is connected to the outlet pipe of the argon blowing device. Add pure iron and scrap steel to the intermediate frequency induction furnace to melt Then add crystallin...

Embodiment 3

[0040] A wear-resistant excavator bucket tooth, containing the following components in weight percentage (wt%): Mn 1.3, Si 0.6, C0.35, S 0, P 0, B 0.004, Re 0.015, Al 0.03, Cr 0.5 , Mo 0.04, the rest is Fe and unavoidable impurities.

[0041] The preparation method comprises the following steps:

[0042] (1) Pour the quartz sand into the mixer, dry mix for 3 minutes, then add water glass, and wet mix for 4 minutes. The weight ratio of quartz sand to water glass is 47:3. Mix it evenly and use it for molding. After the mold is made, Blow CO 2 Harden, paint refractory material, make mold, bake raw material and mold at 320°C for 3h;

[0043] (2) Add an air inlet to the furnace bottom of the intermediate frequency induction furnace. The air inlet is sealed and covered with air-permeable bricks. The air inlet is connected to the outlet pipe of the argon blowing device. Add pure iron and scrap steel to the intermediate frequency induction furnace to melt Then add crystalline silic...

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PUM

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Abstract

The invention relates to the technical field of excavator bucket teeth, in particular to an abrasion-resistant excavator bucket tooth and a preparation method thereof. The abrasion-resistant excavatorbucket tooth comprises, by weight, 1.2-1.6% of Mn, 0.6-0.9% of Si, 0.30-0.37% of C, 0-0.008% of S, 0-0.008% of P, 0.002-0.005% of B, 0.01-0.02% of Re, 0.03-0.05% of Al, 0.5-0.8% of Cr, 0.02-0.05% ofMo and the balance Fe and inevitable impurities. The preparation method comprises the steps of preparation of a die, preheating before melting and melting of all raw materials, and argon blowing operation is conducted in the process. The weight ratio of S is less than or equal to 0.008%, the weight ratio of P is less than or equal to 0.008%, thus, the surface structure of a formed casting is evenly distributed lath martensite, the structure is compact, and the mechanical performance of the casting is improved; argon blowing operation is conducted from the furnace bottom of a medium-frequency induction furnace, argon enters molten steel through furnace bottom air bricks to form lots of bubbles, the degassing area is effectively increased, argon flow continuously stirs the molten steel, finescattered inclusions are coagulated, large-particle impurities are formed, the degassing inclusion removing efficiency is improved, and the combination properties of the casting are improved.

Description

technical field [0001] The invention relates to the technical field of excavator bucket teeth, in particular to a wear-resistant excavator bucket tooth and a preparation method thereof. Background technique [0002] An excavator is a kind of earthwork construction machine, mainly used for digging, loading, and other operations. For the same amount of work required for earthwork, bulldozers and loaders consume more energy than excavators, and for special earthwork construction, bulldozers and loaders cannot complete, so excavators are widely used in highways, railways and other roads Construction, bridge construction, mining, airport port and water conservancy construction, etc. With the rapid development of my country's economic construction, excavators play an increasingly important role in national economic construction. [0003] In earthwork operations, the excavator mainly relies on the composite motion formed by the rotation of the bucket wheel at the front end and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/22C22C38/02C22C38/04C22C38/38C22C38/06C22C33/06C21D1/18E02F9/28C21D9/00
CPCC21D1/18C21D9/0068C21D2211/008C22C33/06C22C38/005C22C38/02C22C38/04C22C38/06C22C38/22C22C38/32C22C38/38E02F9/285Y02P10/20
Inventor 张玉珍张向阳张晓红谢皓宇程映新
Owner 安徽省宁国市亚晨碾磨铸件有限责任公司
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