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Low-carbon multi-component alloy steel for excavator bucket tooth, and its production technology

An excavator bucket tooth and production process technology, applied in the field of low-carbon multi-element alloy steel and its production process, can solve the problems of poor fracture resistance and low service life, improve hardness performance and impact resistance, and increase nucleation , the effect of grain refinement

Active Publication Date: 2013-05-01
滁州恒昌机械装备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most commonly used bucket tooth material in China is high manganese steel, which has the problems of low service life and poor fracture resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The weight percent of each chemical component in the low-carbon multi-component alloy steel for excavator bucket teeth is: C 0.20-0.26%, Si 0.4-0.6%, Mn 0.6-1.2%, Cr 0.5-0.8%, Mo 0.4-0.6%, Cu 0.2-0.3%, Ni 0.8-1.5%, Ti 0.08-0.12%, Y 0.04-0.06%, Ce 0.02-0.04%, P≤0.02%, S≤0.02%, and the balance is iron and impurities.

[0020] The production process of low-carbon multi-component alloy steel for excavator bucket teeth includes the following steps:

[0021] (1) Melting and casting

[0022] Add the steelmaking raw materials into the medium frequency induction furnace for smelting according to the above ratio. The tapping temperature is 1640°C, and then cast in a resin sand mold with a pouring temperature of 1550°C.

[0023] (2) Annealing treatment

[0024] First heat the casting to 720°C at 80°C / hour, keep it warm for 1 hour, then heat it at 120°C / hour to 1150°C, keep it warm for 4 hours, and finally cool it to 860°C at 40°C / hour, then take it out of the furnace and air ...

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PUM

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Abstract

The invention discloses a low-carbon multi-component alloy steel for an excavator bucket tooth. The alloy steel comprises 0.20-0.26wt% of C, 0.4-0.6wt% of Si, 0.6-1.2wt% of Mn, 0.5-0.8wt% of Cr, 0.4-0.6wt% of Mo, 0.2-0.3wt% of Cu, 0.8-1.5wt% of Ni, 0.08-0.12wt% of Ti, 0.04-0.06wt% of Y, 0.02-0.04wt% of Ce, 0.02wt% or less of P, 0.02wt% or less of S, and the balance Fe and impurities. The micro-alloying treatment of trace elements comprising Mo, Cu, Ti, Ni, Y, Ce and the like increases nucleation and further refines crystal grains, so the number, the size and the form distribution of carbides are effectively controlled, included slag is deteriorated, the metallurgical quality and the comprehensive wear resistance are improved, and the comprehensive performances and the service life of the alloy steel are maximally improved. The adoption of a reasonable heat treatment technology, appropriate annealing treatment and appropriate quenching tempering substantially improves the hardness and the impact resistance of the alloy steel.

Description

technical field [0001] The invention relates to a low-carbon multi-component alloy steel for excavator bucket teeth and a production process thereof, belonging to the technical field of alloy steel manufacturing process. Background technique [0002] Excavator bucket teeth are wearing parts that are consumed in large quantities in mining operations. The working conditions are harsh, and most of the failure modes are wear and tear, and a few of them are broken. The bucket teeth are generally installed at the front end of the excavator bucket, which is a cantilever beam member, directly in contact with ore, sand, rock and other materials. When contacting the material, it not only bears the impact action, but also bears the bending moment action. During the service process, the tip of the bucket tooth 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. The mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/50C21D8/00
Inventor 吕忠发
Owner 滁州恒昌机械装备制造有限公司
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