Effect of shot blasting pretreatment on gas carburizing efficiency and layer properties of 45 steel

doi:10.13251/j.issn.0254-6051.2022.11.025

Abstract

Abstract: Effect of shot blasting pretreatment on gas carburizing efficiency and layer properties of 45 steel was studied by means of optical microscope and microhardness tester. The results show that under the same gas carburizing process, shot blasting pretreatment can obviously promote the gas carburizing of the 45 steel, the effective hardening layer of the pretreated carburized specimen increases from 0.994 mm to 1.486 mm, the carburizing efficiency increases by more than 39%, and the surface hardness increases by more than 10%. Compared with the non-shot blasting carburized specimen, shot blasting pretreatment makes the gradient hardness of carburized specimen section increase and decrease more gently from the outside to the inside, reducing the brittleness of carburized layer.

Key words: 45 steel, shot blasting, carburizing efficiency, microhardness

CLC Number:

TG156.8

Cao Pei, Gu Xiaowen, Yan Shaoyun. Effect of shot blasting pretreatment on gas carburizing efficiency and layer properties of 45 steel[J]. Heat Treatment of Metals, 2022, 47(11): 143-146.

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