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The roughness of workpiece depends on cast steel shots peening

2020-12-09 09:41:10   Review:0 Click:
  In production practice, in order to obtain a better cast steel shots peening surface, we should start from the following aspects: provide a better original surface, Ra value should be less than 6.3mm; choose reasonable cast steel shots diameter and cast steel shots peening pressure; after large diameter cast steel shots peening, use smaller cast steel shots to cover once with low pressure to achieve better surface roughness.

  The surface of parts after cast steel shots peening should be slightly polished, and the amount of metal removed should be controlled during grinding. In this way, the strengthening effect of cast steel shots peening is not damaged, but the surface roughness is improved.

  Cast steel shots peening can cause the plastic deformation of the surface of the parts, and change the surface roughness of the parts. Surface roughness is a kind of micro geometric error, also known as micro roughness. Surface roughness, like surface waviness and shape error, belongs to the geometric error of parts. Surface roughness has an important impact on the performance of machine parts. The effect of cast steel shots peening on the surface roughness is usually in the range of 0.6 ~ 20 mm.

  Without changing the process parameters, the higher the original surface roughness of the material, the larger the Ra value after shot peening. Production practice has proved that in general, the surface roughness before cast steel shots peening is less than 6.3 mm, and the original surface roughness can be improved or maintained by cast steel shots peening. If the original surface roughness is more than 6.3 mm, the surface roughness will be reduced after cast steel shots peening.

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