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Effect of Heat Treatment Process on Critical Transformation Temperature of 2.25Cr1Mo0.25V Steel

MA Xi-long， HU Chuan-shun， QIN Hua， JIANG Ying-tian

Abstract （567）

PDF （239KB）（521）

The critical transformation temperature Ac1 and Ac3 of steel 2.25CrlMo0.25V steel under different heat treatment process conditions are studied by thermal expansion method. The results show that the critical transformation temperature of the steel annealed is 797.1 ℃ and 886.2 ℃, the critical transformation [KG*4]temperature [KG*4]of [KG*4]the [KG*4]steel [KG*4]quenched [KG*4]is 801.3 ℃ and 891.4 ℃ and the critical transformation temperature of the steel quenched and tempered is 809.2 ℃ and 898.7 ℃. Different structures affect the critical transformation temperature. So the influence of heat-treating process on the performance and structure should be considered.

2011, 24 (3): 79-81. DOI: 10.3696/j.issn.1006-396X.2011.03.019

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Calculate the Temperature of Oxygen Ethanol Flame and Analysis on Cutting Test

YAN Li-jun， HU Chuan-shun， JIANG Ying-tian， CHEN Qiang， LI Xian-chen

Abstract （272）

PDF （1003KB）（381）

Combustion performance of oxygen ethanol and thermal change in combustion reaction process was analyzed. Calculate the theoretical temperature of oxygen ethanol flame by thermodynamic theory. Relationship between the combustion temperature and the reactant was confirmed,so oxygen ethanol flame can be used in metal oxygen cutting. Feasibility of this method was proofed in further by cutting test and compare with oxygen acetylene. The results show that using appropriate technology in cutting conditions, the quality of slot may meet needs.

2008, 21 (2): 68-70.