Research on Stress Removal Heat Treatment of 980 High Strength Steel for a Transonic Wind Tunnel
Heat treatment is an important step in the manufacturing of structural parts,which is closely related to the manufacturing quality and performance of structural parts.The stress removal and heat treatment technology of 980 high strength steel for a type of cross-sonic wind tunnel was studied.The strength and toughness of 980 high strength steel after primary and secondary de-stress annealing tests were compared and analyzed by tensile test and low temperature impact test at-20 ℃.The results show that when the de-stress annealing temperature is(450±10)℃ and the holding time is 10-12 h,the optimal strength and toughness of 980 high strength steel used in transonic wind tunnel can be obtained.The result of the test is of reference for the stress-treatment of the same kind of material.
980 high strength steelheat treatment process with stress reliefstrengthductility
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