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High-strength high-toughness wear-resisting steel for excavator bucket teeth and manufacturing method thereof

A technology of excavator bucket teeth and alloy steel, which is applied in the field of alloy structural steel, can solve problems such as the inability to meet the needs of environmental excavator bucket teeth, and achieve microstructure and steel internal quality, high purity, and meet technical requirements Effect

Active Publication Date: 2014-02-05
LAIWU IRON & STEEL GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The bucket tooth alloy steel reported in the prior art cannot meet the needs of excavator bucket teeth in harsh environments

Method used

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  • High-strength high-toughness wear-resisting steel for excavator bucket teeth and manufacturing method thereof
  • High-strength high-toughness wear-resisting steel for excavator bucket teeth and manufacturing method thereof
  • High-strength high-toughness wear-resisting steel for excavator bucket teeth and manufacturing method thereof

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Embodiment

[0042] The low-carbon silicon-manganese-molybdenum-vanadium alloy steel of the present invention is smelted by UHP (ultra-high-power electric furnace), LF (external furnace refining), VD vacuum degassing treatment process, through full-protection casting and continuous casting, and hot-rolled into material. The embodiment specifically illustrates how the present invention is implemented with the production of Φ80mm specification round steel.

[0043] The preparation method of low-carbon silicon-manganese-molybdenum-vanadium alloy steel for excavator bucket teeth, the composition of the steel is as described in Table 1, and the steps are as follows:

[0044] (1) Smelting and alloying, using electric furnace smelting, the end point [C]≥0.10%, P≤0.012%, the content of residual elements meets the design requirements, and the temperature of molten steel reaches 1630~1660℃ for tapping; LF refining outside the furnace, refining slag Alkalinity is controlled at 3.0-3.4; white slag ret...

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Abstract

The invention relates to high-strength high-toughness wear-resisting steel for excavator bucket teeth and a manufacturing method thereof. The high-strength high-toughness wear-resisting steel comprises the following components in percentage by weight: 0.23-0.27% of C, 0.001-0.025% of P, 0.90-1.20% of Si, 0.001-0.025% of S, 2.20-2.60% of Mn, 0.10-0.30% of Cr, 0.30-0.40% of Mo, 0.10-0.30% of Cu, 0.08-0.12% of V, 0.10-0.30% of Ni, 0-15*10<-4>% of [O], 0.015-0.040% of Al and the balance of Fe and inevitable impurities. The invention also provides the manufacturing method of the steel for the excavator bucket teeth. The prepared low carbon silicon-magnesium-molybdenum-vanadium alloy has high strength, high toughness and high purity and is used for forging the excavator bucket teeth working in severe environments.

Description

technical field [0001] The invention belongs to the technical field of alloy structural steel, and in particular relates to a low-carbon silicon-manganese-molybdenum-vanadium high-performance alloy structural steel for forging high-strength, high-toughness and wear-resistant excavator bucket teeth and a manufacturing method thereof. Background technique [0002] The bucket tooth is an important wear part on the excavator, and its structure has two types: integral type and combined type. The combined bucket tooth is the most widely used structural form in the market at present, and the bucket tooth and the tooth seat are connected by pins. The main failure modes are wear and fracture. The working surface of the bucket tooth is in direct contact with the excavated object, and when its wear resistance is insufficient, it will cause excessive wear and be scrapped in advance. The sharp-edged excavated objects slide on the tooth surface, cutting the tooth surface like a knife, c...

Claims

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Application Information

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IPC IPC(8): C22C38/58C22C33/04C21D8/00E02F9/28
Inventor 时振明翟正龙李小雄戈文英路礼堂郭峰
Owner LAIWU IRON & STEEL GRP
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