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对油井管钻杆材料TA2纯钛和钻头材料14MnMoVN钢进行了异种合金真空扩散焊试验,对不同焊接参数下的焊接接头的微观组织和力学性能进行试验分析,分析了加热温度和保温时间对接头抗拉强度的作用规律。结果表明,焊接接头存在明显的界面,形成了断续的化合物反应层,主要为Ti-Fe金属间化合物。接头强度最高达到182MPa。相同保温时间下,随着加热温度的增加,接头的抗拉强度增大,但温度不宜超过900℃。相同加热温度下,随着保温时间增加,界面的结合强度先升高后降低。
The heterogeneous alloy vacuum diffusion welding test was carried out on TA2 pure titanium for drill pipe material and 14MnMoVN drill material. The microstructure and mechanical properties of welded joints under different welding parameters were analyzed. The effects of heating temperature and holding time on the joints Tensile strength of the law. The results show that there is a clear interface of the welded joints, forming a discontinuous compound reaction layer, mainly Ti-Fe intermetallic compounds. Joint strength up to 182MPa. The same holding time, with the heating temperature increases, the joint tensile strength increases, but the temperature should not exceed 900 ℃. With the same heating temperature, with the holding time increases, the bonding strength of the interface first increases and then decreases.