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Shot blasting machine wear-resistant blade and preparation method thereof

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

Active Publication Date: 2010-03-17
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 cast-formed wear-resistant blade of the shot blasting machine is then subjected to hot forging treatment, using hot work die steel to provide a mold, and die forging 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 by water toughening treatment to improve its toughness.

[0016] (2) Put the above-prepared blast wheel wear-resistant blades into the spherical tank, and add Al according to the weight ratio of grinding balls: shot blaster wear-resistant blades = 1:10 2 O 3 Grinding balls, tighten the nuts symmetrically to ensure the tightness of the spherical tank; then fill the spherical tank with argon to drive out the air in the tank, and the inflation time is half an hour; the sealed spherical tank after inflation is carried out in a planetary high-energy ball mill. High-energy ball mill, stop the ball mill for ...

Embodiment 2

[0020] Except for the element components and weight percentages of the cast-formed blast wheel 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. In the step (1), the initial forging temperature was 1200° C., the final forging temperature was 980° C., and the grinding ball diameter in the step (2) was 5 mm; the rotational speed of the ball mill was 300 r / min; The surface hardness of the blast wheel wear-resistant blade prepared in this example is HB500, and the fracture toughness is 11.8Mpa / m 2 .

Embodiment 3

[0022] Except for the cast and formed shot blasting wear-resistant blade used in step (1), the element composition and weight percentage are: C1.2%, Mn 12%, Cr 1.0%, Mo 0.15%, Si 0.8%, S 0.04%, P 0.07%, and the rest is iron; in step (1), the initial forging temperature is 1180 ° C, the final forging temperature is 970 ° C, and the grinding ball diameter in step (2) is 3 mm; The rest are the same as in Example 1. The surface hardness of the blast wheel wear-resistant blade prepared in this example is HB520, and the fracture toughness is 12.5Mpa / m 2 .

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PUM

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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 blastingmachine 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 of which the surface of ZGMn13 is inductively rolled by a planetary ball milling 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 ductile 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 carbides of 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 resistant to wear. However, high-chromium cast iron wear parts have high chromium content, high cost, and high casting defects. In the case of impact friction and wear, it is easy to peel off from the casting defects layer by la...

Claims

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Application Information

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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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