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Method for preparing wear-resistant cast steel bucket tooth

A bucket tooth and cast steel technology, which is applied in the field of metal wear-resistant materials, can solve problems such as complex process and poor quality stability of bucket teeth, and achieve the effects of simplifying the operation process, reducing energy consumption, and shortening the melting time

Inactive Publication Date: 2009-06-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the disadvantages of complex process and poor tooth quality stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use a 350kg medium-frequency induction furnace to melt the bucket tooth material. The specific process steps are as follows:

[0020] 1) Tinplate leftovers, high-carbon ferrochrome, medium-carbon ferromanganese, ferrosilicon, ferroboron, ferrozirconium and ferrotitanium, respectively by mass percentage 96.57%, 1.5%, 1.2%, 0.4%, 0.035%, 0.045% and 0.25% is mixed in one body, and compacted on a press into a cube with a size of 150mm×150mm×150mm, and then the compacted cube is directly put into an induction furnace for heating, and it is released when the temperature reaches 1638°C;

[0021] 2) After the molten steel is left to stand for 3 minutes, it is poured into a wax mold shell whose mold shell temperature is not lower than 500°C;

[0022] 3) When the surface temperature of the bucket tooth reaches 940°C, put the bucket tooth and the formwork into water to cool down, then cut the sprue on the bucket tooth, and heat the bucket tooth to 280°C with the furnace, keep it w...

Embodiment 2

[0026] Use a 450kg medium-frequency induction furnace to melt the bucket tooth material. The specific process steps are as follows:

[0027] 1) Tinplate leftovers, high-carbon ferrochrome, medium-carbon ferromanganese, ferrosilicon, ferroboron, ferrozirconium and ferrotitanium, respectively by mass percentage 96.54%, 1.8%, 0.8%, 0.6%, 0.025%, 0.055% and 0.18% is mixed in one body, and compacted into a cube with a size of 200mm×200mm×200mm on a press, and then the compacted cube is directly put into an induction furnace for heating, and it is released when the temperature reaches 1603°C;

[0028] 2) After the molten steel is left to stand for 5 minutes, it is poured into a wax mold shell whose mold shell temperature is not lower than 500°C;

[0029] 3) When the surface temperature of the bucket tooth reaches 890°C, put the bucket tooth and the formwork into water to cool down, then cut the sprue on the bucket tooth, and heat the bucket tooth to 230°C with the furnace, keep it w...

Embodiment 3

[0033] Use a 350kg medium-frequency induction furnace to melt the bucket tooth material. The specific process steps are as follows:

[0034] 1) Tinplate leftovers, high-carbon ferrochrome, medium-carbon ferromanganese, ferrosilicon, ferroboron, ferrozirconium and ferrotitanium, respectively by mass percentage 96.52%, 1.65%, 1.05%, 0.50%, 0.03%, 0.05% and 0.20% mixed in one body, and compacted on a press into a cube with a size of 150mm×150mm×150mm, and then put the compacted cube directly into an induction furnace for heating, and it will be released when the temperature reaches 1621°C;

[0035] 2) After the molten steel is left to stand for 4 minutes, it is poured into a wax mold shell whose mold shell temperature is not lower than 500°C;

[0036] 3) When the surface temperature of the bucket tooth reaches 920°C, put the bucket tooth and the formwork into water to cool down, then cut the sprue on the bucket tooth, and heat the bucket tooth to 250°C with the furnace, keep it w...

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Abstract

The invention relates to a method for preparing a wear-resistant cast steel bucket tooth, which belongs to the technical field of metal wear-resistant materials. The prior bucket tooth and the processing technique thereof have the problems of high cost, complex technique and the like. In the method, tinplate leftover material, high carbon ferro-chrome, mid-carbon ferromanganese, silicoferrite, ferroboron, ferrozirconium and ferrotitanium are mixed up respectively according to the following mass percent: 96.3 to 97.0 percent, 1.5 to 1.8 percent, 0.8 to 1.2 percent, 0.4 to 0.6 percent, 0.025 to 0.035 percent, 0.045 to 0.055 percent and 0.18 to 0.25 percent; the mixture is compacted by a forcing press to form a quadrel which is then put in an induction furnace for heating and melting down and is cast to form the bucket tooth in a cere shuttering; the bucket tooth is put in water directly for cooling after being congealed, and is tempered under the low temperature at last to obtain the wear-resistant cast steel bucket tooth. The method for preparing the wear-resistant cast steel bucket tooth has the advantages of low manufacture cost, high productivity effect, long service life of the bucket tooth, etc.

Description

technical field [0001] The invention belongs to the technical field of metal wear-resistant materials. Specifically relates to a preparation method of wear-resistant cast steel bucket teeth, in particular to a preparation method of wear-resistant cast steel bucket teeth using tinplate scraps as main raw materials. Background technique [0002] The bucket teeth are generally installed at the front end of the excavator bucket, which is a cantilever beam member, directly in contact with materials such as ore, sand, rock, etc. When contacting the material, it bears both impact and bending. During the service process, the tip of the bucket teeth is subject to large impact and sliding abrasive wear, and various furrows and deformations often appear on the surface of the tip, resulting in surface wear or shedding. Domestic large excavators mostly use imported material 20CrNi2Mo, which is costly. Chinese invention patent CN1385550 discloses a high wear-resistant alloy and its prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D25/06C22C37/10
Inventor 符寒光朱国海朱国宏雷永平吴中伟林健
Owner BEIJING UNIV OF TECH
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