Method for preparing TiC+Al2O3 particle-reinforced steel-based surface-recombined excavator form-relieved tooth

A technology of particle reinforcement and surface compounding, applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve problems such as difficult to achieve satisfactory level, limited wear resistance of shovel teeth, etc.

Inactive Publication Date: 2013-02-13
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the microstructure of these materials, due to the lack of high-hardness wear-resistant particles or the existence of reinforcing phases, the improvement of the wear resistance of cutting teeth is limited, and it is difficult to achieve a satisfactory level.

Method used

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  • Method for preparing TiC+Al2O3 particle-reinforced steel-based surface-recombined excavator form-relieved tooth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Titanium dioxide, iron scale powder, aluminum powder, ferro-titanium powder and carbon powder are composed according to the alloy powder: 200-350 mesh titanium dioxide 25wt%, 200-350 mesh iron scale powder 15wt%, 200-350 mesh aluminum powder 25wt% , 200-350 mesh carbon powder 10wt% and 150-200 mesh Ti-Fe powder 25wt%; add to the ball mill and mix thoroughly for 0.5 hours, the ratio of material to ball is 10:1. After that, add 2-4vol.% binder to make alloy powder coating. Pour the alloy powder coating into the mold, and press it into a sheet on a hydraulic press, the thickness of the sheet is ≥3mm, and the pressure is 40MPa. Paste the pressing sheet on the two working tooth surfaces of the excavator shovel tooth foam plastic EPS model. Then, hang 1-2mm thick magnesia powder-based anti-sticking sand coating on the whole EPS pattern. The EPS pattern can be dried in an oven at 50oC for 24 hours, and it can also be fully dried in the natural environment.

[0022] Place th...

Embodiment 2

[0025] Titanium dioxide, iron scale powder, aluminum powder, ferro-titanium powder and carbon powder are composed according to the alloy powder: 200-350 mesh titanium dioxide 25wt%, 200-350 mesh iron scale powder 15wt%, 200-350 mesh aluminum powder 25wt% , 200-350 mesh carbon powder 10wt% and 150-200 mesh Ti-Fe powder 25wt%; add to the ball mill and mix thoroughly for 0.5 hours, the ratio of material to ball is 10:1. After that, add 2-4vol.% binder to make alloy powder coating. Pour the alloy powder coating into the mold, and press it into a sheet on a hydraulic press, the thickness of the sheet is ≥3mm, and the pressure is 40MPa. Paste the pressing sheet on the two working tooth surfaces of the excavator shovel tooth foam plastic EPS model. Then, hang 1-2mm thick magnesia powder-based anti-sticking sand coating on the whole EPS pattern. The EPS pattern can be dried in an oven at 50oC for 24 hours, and it can also be fully dried in the natural environment.

[0026] Place th...

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Abstract

The invention relates to a method for preparing a TiC+Al2O3 particle-reinforced steel-based surface-recombined excavator form-relieved tooth. The method disclosed by the invention comprises the following steps: preparing an alloy powder coating by using titanium dioxide, iron scale powder, aluminium powder, ferrotitanium powder, carbon powder and an organic binder; pressing the alloy powder coating into pieces, and adhering the pieces to two working tooth surfaces of a foamed plastic EPS (expanded polystyrene) model of the excavator form-relieved tooth; then, preparing an EPS appearance of the form-relieved tooth through externally coating an anti-sticking sand coating and drying; and smelting molten steel in a medium-frequency induction furnace or an electric-arc furnace, and carrying out casting moulding by using a V-EPC vacuum evaporative pattern casting method. Through testing, in the prepared particle-reinforced steel-based surface-recombined excavator form-relieved tooth, a composite layer and a steel substrate form a metallurgical combination state; the composite layer is dense in organization, and the thickness of the composite layer can reach more than 3 mm; the surface hardness HRC of the composite layer can be greater than or equal to 53; and compared with similar excavator form-relieved teeth which are not subjected to surface composition, the service life of the excavator form-relieved tooth can be prolonged by 2-3 times.

Description

technical field [0001] The invention relates to a TiC+Al 2 o 3 The invention discloses a preparation process of excavator shovel teeth with dual-phase particle reinforced steel-matrix surface composite, belonging to the field of particle-reinforced steel-based composite materials. Background technique [0002] Shovel teeth are the main wearing parts on excavators. At present, the shovel teeth at home and abroad are still dominated by integral shovel teeth made of a single wear-resistant material, and composite shovel teeth are rare in the market. [0003] The materials of the overall shovel teeth mainly include high manganese steel Mn13 and Cr-Ni-Mo type martensitic wear-resistant steel. High manganese steel shovel teeth have obvious advantages in the shovel tooth market at home and abroad because of their simple production process, low cost and low price. However, the wear resistance of high manganese steel shovel teeth is not ideal, especially on small and medium excav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/08B22C9/04
Inventor 郭长庆
Owner JIANGSU UNIV
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