本发明提供了一种高强韧钼合金,以重量份数计,由以下原料制成:氢化钛为5~20份,氢化锆为0.8~2份,镁粉为0.2~0.4份,钼粉为1000份;或氢化钛为5~20份,氢化铪为0.8~2份,镁粉为0.2~0.4份,钼粉为1000份。本发明的高强韧钼合金的综合性能好,室温抗拉强度大于1200MPa,伸长率大于8.0%。本发明通过还原性更强的Mg元素作为还原剂,一方面可以与氧结合,有效降低钼体系内有害元素氧的含量,减少C元素还原生成气体产生的孔隙,在基体内部的偏析以及与基体生成粗大的第二相的影响,另一方面,Mg元素与氧元素可形成具有高温稳定性的氧化镁强化相。四方结构的氧化镁相与体心立方的钼基体结构相似,能够与基体形成共格或半共格晶体学关系,强韧化作用显著。
The invention provides a high strength and tough molybdenum alloy, by weight parts, made of the following raw materials: titanium hydroxide 5 ~ 20 parts, zirconium hydroxide 0.8 ~ 2 parts, magnesium powder 0.2 ~ 0.4 parts, molybdenum powder 1000 parts; Or titanium hydride 5 ~ 20, hafnium hydride 0.8 ~ 2, magnesium powder 0.2 ~ 0.4, molybdenum powder 1000. The high strength and tough molybdenum alloy of the invention has good comprehensive properties, tensile strength is greater than 1200MPa at room temperature, and elongation is greater than 8.0%. On the one hand, Mg element with stronger reducibility can be combined with oxygen to effectively reduce the content of harmful element oxygen in the molybdenum system, reduce the influence of pores generated by the gas generated by the reduction of element C, segregation in the matrix and formation of coarse second phase with the matrix. On the other hand, Mg element and oxygen element can form magnesium oxide enhanced phase with high temperature stability. The tetragonal magnesium oxide phase is similar to the body centered cubic molybdenum matrix, and can form a coherent or semi-coherent crystallographic relationship with the matrix, and has a significant strengthening and toughening effect.