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30CrMnMoTiA钢是立足于我国资源、为代用30CrNi3A、25CrNiWA等含镍钢而研制的新钢种。它具有低的过热敏感性、较好的淬透性、抗回火性和较小的回火脆化倾向,经淬火、低温回火后具有细小的回火马氏体组织,强度和韧性配合良好,其常规力学性能还达:σ_b≥155公斤力/毫米~2,σ_(0.2)≥135公斤力/毫米~2,σ≥9％,Ψ≥45％,α_K≥6。 30CrMnMoTiA钢用于生产五六式冲锋枪和六三式步枪枪机框。机框是枪上重要的运动受力部件,力学性能要求较高。虽然该钢淬透性较好,但较难适应多种热处理方
30CrMnMoTiA steel is based on China’s resources, as substitute 30CrNi3A, 25CrNiWA other nickel-containing steel and developed a new type of steel. It has low overheating sensitivity, good hardenability, tempering resistance and temper embrittlement tendency of small, after quenching, tempering after tempering with a small tempered martensite, strength and toughness with the Good, its conventional mechanical properties also reached: σ_b ≥ 155 kgf / mm2, σ_ (0.2) ≥135 kgf / mm2, σ≥9%, Ψ≥45%, α_K≥6. 30CrMnMoTiA steel used to produce five six submachine gun and six three rifle gun frame. Machine frame is an important sports force components on the gun, high mechanical properties. Although the steel hardenability is better, but more difficult to adapt to a variety of heat treatment side