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Excavator dipper teeth and excavator with the same

A technology of excavator bucket teeth and bucket teeth, which is applied in the field of excavator and excavator bucket teeth, can solve the problems of limited space for improving the overall life of excavator bucket teeth, and achieve high cost performance, good hardening effect, and reduced cost of bucket teeth Effect

Active Publication Date: 2018-10-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN105598639A introduces the manufacturing method of excavator bucket teeth, and specifically optimizes the heat treatment, which improves the quality of the bucket teeth and reduces the cost, but there is limited room for improving the overall life of the excavator bucket teeth

Method used

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  • Excavator dipper teeth and excavator with the same
  • Excavator dipper teeth and excavator with the same
  • Excavator dipper teeth and excavator with the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The chemical composition of excavator bucket teeth and the weight percentage of each component are: C: 1.0%, Si: 0.30%, Mn: 23.0%, Al: 6.0%, B: 0.003%, RE (La and Ce mixed rare earth) : 0.30%, P<0.0015%, S<0.0015%, the balance is Fe.

[0044] Ingredients: Select high-quality broken steel sheets, ferrosilicon, recarburizer, pure manganese, pure aluminum, high-carbon ferrochromium, ferroboron, rare earth according to the alloy content;

[0045] Melting: Smelting crushed steel sheets in an intermediate frequency induction furnace, adding pure aluminum when the temperature of the molten steel reaches 1550~1580°C, adding carburant to adjust the C content, adding high-carbon ferrochrome, ferroboron, ferrosilicon, and pure manganese; After the alloy is fully melted, when the temperature reaches above 1580°C, take a sample and analyze the weight percentage of each element composition, mainly looking at C, P, S, and B. It is necessary to ensure that P and S are below the upper l...

Embodiment 2

[0052] Design composition and batching, smelting and casting molding steps are with embodiment 1, and difference is:

[0053] Precise heat treatment: use an electric furnace that can precisely control the heating rate, temperature, and holding time to heat the casting, heating from room temperature to 550 °C at a heating rate of 90 °C / h, and then heating from 550 °C to After heat preservation at 1040°C for 1.5h for water toughening treatment, heat preservation at 560°C for 2.5h for aging treatment, and then air-cool to room temperature;

[0054] Surface blast hardening treatment: Spread 2.5mm thick explosives on the surface of excavator bucket teeth. The explosives are adhesive plastic explosives with a density of 1.42g / cm 3 , the detonation velocity is 7700m / s, and the No. 8 detonator is used for reliable primary detonation;

[0055] The surface hardness of excavator bucket teeth after explosion treatment is 400 HB, and the impact toughness (V-shaped notch) is 110J / cm 2 , t...

Embodiment 3

[0058] Design composition and batching, smelting and casting molding steps are with embodiment 1, and difference is:

[0059] Precise heat treatment: Use an electric furnace that can precisely control the heating rate, temperature, and holding time to heat the casting, heating from room temperature to 600 °C at a heating rate of 100 °C / h, and then heating from 600 °C to 600 °C at a heating rate of 200 °C / h After heat treatment at 1040°C for 1.5h for water toughening treatment, heat preservation at 560°C for 2.5h for aging treatment, and then air-cool to room temperature;

[0060] Surface blast hardening treatment: Spread 2.5mm thick explosives on the surface of excavator bucket teeth. The explosives are adhesive plastic explosives with a density of 1.42g / cm 3 , the detonation velocity is 7700m / s, and the No. 8 detonator is used for reliable primary detonation;

[0061] The surface hardness of excavator bucket teeth after blast treatment is 420 HB, and the impact toughness (V-...

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Abstract

The invention discloses an excavator dipper teeth and an excavator with the same. The dipper teeth are Fe-Mn-Al-C light high-manganese steel, the dipper teeth is low in cost, high in hardness and impact toughness; and the preparation of the dipper teeth is characterized in that after accurate heat treatment is carried out on a casting piece with a certain alloy content, surface explosion hardeningtreatment is further carried out; the surface hardness of the excavator dipper teeth treated by the method is larger than or equal to 380 HB, the impact toughness (a V-shaped notch) is larger than orequal to 100J / cm<2>, the tensile strength is larger than or equal to 840 MPa, the average wear resistance is 2.2-2.5 <-1>, the average wear resistance is improved by 40%-50%, so that the excavator dipper teeth and the excavator with the same has the advantages of high in strength, high in wear resistance, high in toughness and the like, and the service life is prolonged.

Description

technical field [0001] The invention relates to a bucket tooth, in particular to an excavator bucket tooth and an excavator with the bucket tooth. Background technique [0002] Excavator bucket tooth is an important consumable part on the excavator, which is composed of tooth seat and tooth tip. Premature failure of parts of mining machinery due to wear increases the economic cost of mining. Bucket teeth are the key wearing parts of excavators, and their operating objects are ore, rock or soil, and the working conditions are very harsh. When the excavator is working, the bucket teeth not only have severe abrasive wear, but also bear a certain impact load, so the life of the bucket teeth is often very short and the consumption is huge. The 2m currently in service in our country 3 There are 2,000-2,500 large mining excavators above, and the direct economic loss of bucket teeth reaches about 30 million yuan per year. At the same time, the indirect economic losses caused by e...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C33/06C21D9/00C21D1/06E02F9/28
CPCC21D1/06C21D9/0068C22C33/06C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06E02F9/28
Inventor 宋仁伯巴奇楠冯一帆于浩男裴中正
Owner UNIV OF SCI & TECH BEIJING
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