Effects of heating and cooling conditions on surface oxidation and decarbonization of alloy tool steel S2

doi:10.13251/j.issn.0254-6051.2023.08.020

Abstract

Abstract: Effects of heating temperature, holding time and cooling method on surface oxidation and decarbonization of the alloy tool steel S2 were investigated by means of metallographic method, microhardness and mass loss tests. The results show that the oxidation mass loss rate increases with the increase of heating temperature and holding time. Under the same holding time, with the increase of heating temperature, the depth of complete decarbonization layer first increases and then gradually decreases, and reaches the maximum at 800 ℃. When the heating temperature is below 1050 ℃, the depth of complete decarbonization layer increases slowly with the increase of heating temperature. When the heating temperature is above 1050 ℃, the depth of complete decarbonization layer increases obviously. The complete decarbonization layer almost disappears when heated at 1200 ℃, and the burning damage is serious at this temperature. Under the same heating condition, the smaller the cooling rate, the more serious the decarbonization.

Key words: alloy tool steel S2, heating temperature, cooling method, oxidation, decarburization

CLC Number:

TG156.1

Tu Xingkuang, Zuo Jinzhong, Zhao Yun, Su Zhenwei. Effects of heating and cooling conditions on surface oxidation and decarbonization of alloy tool steel S2[J]. Heat Treatment of Metals, 2023, 48(8): 124-131.

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