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A method of manufacturing low-alloy wear-resistant shovel teeth for mines

A manufacturing method and low-alloy technology, applied in the field of wear-resistant materials, can solve the problems of bending deformation, brittle cracking, and low yield strength of high manganese steel, and achieve the effect of improving wear resistance and refining structure

Active Publication Date: 2017-05-10
ANHUI SANFANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional shovel tooth material is high manganese steel (Mn13). The wear resistance of this steel is obtained through work hardening under the action of high impact force during use. The wear resistance of the material itself is not ideal, and the cost of raw materials and heat treatment is relatively high. High, complex smelting process; and the yield strength of high manganese steel is low, it is prone to bending deformation under impact and extrusion conditions, resulting in brittle cracking, and sometimes it is difficult to disassemble the combined shovel teeth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The low-alloy wear-resistant shovel teeth for mines in this embodiment, the weight percentages of the chemical components in the shovel teeth are: C: 0.21%, Si: 0.80%, Mn: 1.12%, Cr: 1.10%, Mo: 0.25%, Ti: 0.05%, V: 0.10%, B: 0.001%, RE: 0.11%, S: ≤0.04%, P: ≤0.04%, and the balance is Fe.

[0022] According to the weight percent of each chemical component in the present embodiment, preparation method comprises the following steps:

[0023] (1) Smelting: According to the weight ratio of the above chemical components, the raw materials are added to the intermediate frequency induction furnace for smelting. The melting temperature is 1650 ° C. During the smelting process, samples are taken for chemical analysis, and the chemical components are controlled within the specified range. 4 minutes before the furnace, add ferromanganese and ferrosilicon at 0.2 kg per ton of molten steel for pre-deoxidation, and finally add 0.6 kg of pure aluminum per ton of molten steel for final ...

Embodiment 2

[0028] The low-alloy wear-resistant shovel teeth for mines in this embodiment, the weight percentages of the chemical components in the shovel teeth are: C: 0.38%, Si: 1.00%, Mn: 1.37%, Cr: 1.32%, Mo: 0.30%, Ti: 0.06%, V: 0.11%, B: 0.003%, RE: 0.16%, S: ≤0.04%, P: ≤0.04%, and the balance is Fe.

[0029] According to the weight percent of each chemical component in the present embodiment, preparation method comprises the following steps:

[0030] (1) Smelting: According to the weight ratio of the above chemical components, the raw materials are added to the intermediate frequency induction furnace for smelting. The melting temperature is 1660°C. During the smelting process, samples are taken for chemical analysis, and the chemical components are controlled within the specified range. 4 minutes before being released from the furnace, add ferromanganese and ferrosilicon at 0.25 kg per ton of molten steel for pre-deoxidation, and finally add 0.7 kg of pure aluminum per ton of molt...

Embodiment 3

[0035] The low-alloy wear-resistant shovel teeth for mines in this embodiment, the weight percentages of the chemical components in the shovel teeth are: C: 0.52%, Si: 1.20%, Mn: 1.65%, Cr: 1.52%, Mo: 0.35%, Ti: 0.08%, V: 0.12%, B: 0.005%, RE: 0.23%, S: ≤0.04%, P: ≤0.04%, and the balance is Fe.

[0036] According to the weight percent of each chemical component in the present embodiment, preparation method comprises the following steps:

[0037] (1) Smelting: According to the weight ratio of the above chemical components, the raw materials are added to the intermediate frequency induction furnace for smelting. The melting temperature is 1670 ° C. During the smelting process, samples are taken for chemical analysis. 5 minutes before the furnace is released, 0.3 kg per ton of molten steel is added with ferromanganese and ferrosilicon for pre-deoxidation, and finally 0.8 kg of pure aluminum is added per ton of molten steel for final deoxidation;

[0038] (2) Pouring: Molten stee...

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PUM

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Abstract

The invention provides a special low-alloy abrasion-resistant shovel tooth for mines and a manufacturing method of the special low-alloy abrasion-resistant shovel tooth for mines. The shovel tooth is prepared from, by weight percentage, 0.21-0.52% of C, 0.80-1.20% of Si, 1.12-1.65% of Mn, 1.10-1.52% of Cr, 0.25-0.35% of Mo, 0.05-0.08% of Ti, 0.10-0.12% of V, 0.001-0.005% of B, 0.11-0.23% of Re, not larger than 0.04% of S, not larger than 0.04% of P and the balance Fe. The shovel tooth is good in mechanical property, high in impact resistance, abrasion resistance and tenacity, long in service life, low in cost, simple in manufacturing technology and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a method for manufacturing low-alloy wear-resistant shovel teeth special for mines. Background technique [0002] Abrasion is a common failure mode of mechanical products, which brings huge economic losses to the society every year. The shovel tooth is one of the main wear parts on the excavator, which consumes a lot, and a considerable number of shovel teeth need to be imported every year. The actual working conditions of the shovel teeth are very harsh. When contacting materials, they are not only subject to wear, but also bear certain impact loads. [0003] The traditional shovel tooth material is high manganese steel (Mn13). The wear resistance of this steel is obtained through work hardening under the action of high impact force during use. The wear resistance of the material itself is not ideal, and the cost of raw materials and heat treatment is relativel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/38C22C38/32C21D9/00C21D1/28C21D1/18E02F9/28
Inventor 仰明李和成
Owner ANHUI SANFANG NEW MATERIAL TECH CO LTD