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Shot blasting machine wear-resistant blade and preparation method thereof

A shot blasting machine and blade technology, applied in the direction of rotor blades, abrasives, impellers, etc., can solve the problems of high manganese steel service life reduction, coarse grains, peeling off blocks, etc., to improve surface hardness, increase service life, The effect of eliminating surface microscopic defects

Active Publication Date: 2010-12-29
SHANDONG KAITAI SHOT BLASTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the casting process of high manganese steel, there are inevitably various casting defects, such as porosity, shrinkage cavity, micro-cracks, coarse grains and compositional structure segregation, etc. These defects will easily appear in the casting during use. Longitudinal horizontal cracks, vertical cracks, crushing, peeling off blocks, etc. caused early failure, resulting in reduced service life of high manganese steel
In addition, because the ZGMn13 material does not have sufficient processing hardness under actual working conditions, when the shot material contacts the surface of the wear-resistant blade of the shot blasting machine, each particle cuts off the material surface like a tiny cutter, so the abrasive The process of contacting the wear-resistant blade of the shot blasting machine is the process of continuous impact wear due to microscopic cutting and continuous deformation and strengthening of the surface of the wear-resistant material. Difficult to control, wear-resistant materials will be worn away quickly by friction like ordinary materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) The wear-resistant blades of the cast blasting machine are then hot-forged, and the hot-working die steel is used to provide the mold, and the die forging is carried out on a 500T press. The initial forging temperature is 1150 ° C, the final forging temperature is 960 ° C, and then trimmed , Deburring, finishing, and then transformed into a single austenite structure through water toughening treatment to improve its toughness.

[0016] (2) Put the above-mentioned blasting machine wear-resistant blades into the spherical tank, and add Al in the ratio of grinding balls by weight: shot blasting machine wear-resistant blades=1:10 2 o 3 Grinding the balls, tightening the nuts symmetrically to ensure the tightness of the spherical tank; then filling the spherical tank with argon to drive out the air in the tank, and the filling time is half an hour; the sealed spherical tank after inflation is processed in a planetary high-energy ball mill. High-energy ball mill, stop th...

Embodiment 2

[0020] In addition to the elemental components and weight percentages of the cast blasting wear-resistant blade described in step (1): C 1.0%, Mn 11.0%, Cr 1.1%, Mo 0.15%, Si 0.5%, S 0.05 %, P 0.065%, the rest is iron. The initial forging temperature in step (1) is 1200°C, the final forging temperature is 980°C, the diameter of the grinding ball in step (2) is 5mm; the speed of the ball mill is 300r / min; the rest are the same as in Example 1. The surface hardness of the wear-resistant blade of the shot blasting machine obtained in this embodiment is HB500, and the fracture toughness is 11.8Mpa / m 2 .

Embodiment 3

[0022] In addition to the elemental components and weight percentages of the cast blasting wear-resistant blade used in the step (1): C1.2%, Mn 12%, Cr 1.0%, Mo 0.15%, Si 0.8%, S 0.04%, P 0.07%, and the rest are iron; the initial forging temperature in step (1) is 1180°C, the final forging temperature is 970°C, and the diameter of the grinding balls in step (2) is 3mm; the ball mill speed is 320r / min, All the other are with embodiment 1. The surface hardness of the wear-resistant blade of the shot blasting machine obtained in this embodiment is HB520, and the fracture toughness is 12.5Mpa / m 2 .

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Abstract

The invention discloses a shot blasting machine wear-resistant blade and a preparation method thereof, the shot blasting machine wear-resistant blade is obtained by the cast shot blasting machine wear-resistant blade through hot forging, water toughening and high-energy planetary ball milling, the superficial hardness is HB500-550, and the fracture toughness is 11.0-12.8MPa / m<2>. The shot blasting machine wear-resistant blade processed through the invention can be larger and harder under the high speed impact of shot materials in the process of practical application, and the service life is greatly prolonged to 4, 000 hours and is ten times of the service life of high-chromium iron.

Description

technical field [0001] The invention relates to a wear-resistant blade of a shot blasting machine and a preparation method thereof, in particular to a novel wear-resistant blade whose surface is strengthened by rolling ZGMn13 induced by a planetary ball grinding method and a preparation method thereof. Background technique [0002] The development of cast iron wear-resistant materials has gone through three stages: white cast iron, medium manganese nodular iron and high chromium cast iron. At present, most shot blasting machines and mills are made of high chromium cast iron. This cast iron is characterized by Cr / C ≥ 5, and the carbide is M 7 C 3 [(Cr Fe) 7 C 3 ] type, carbide hardness 1200~1600HV, higher than Fe 3 C(M 3 C) has high hardness and is more wear-resistant. However, high chromium cast iron wear-resistant parts have high chromium content, high cost, and high casting defects. Under the condition of impact friction and wear, they are easy to peel off layer by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24C5/06C22C38/38C22C38/60C21D7/06C21D1/00B23P15/02
Inventor 王守仁王瑞国戴勋章吴成民
Owner SHANDONG KAITAI SHOT BLASTING MACHINERY
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