Abstract

The influence of kinematic parameters of explosive welding of brass L63 with Invar 36N on the quality of the layers and the structure of the welding zone of thermobimetal grade TB 1353 (TB 130/17) was experimentally studied. It is shown that, since alloy L63 containing a fusible component (zinc) is used as an active layer in the thermobimetal, the choice of welding mode should be carried out taking into account the prevention of the “ejection” effect. In this case, the flow of shock-compressed gas with high pressure, moving in the gap at high speed, carries a low-melting phase; therefore, the strength of the connection is reduced up to full loss of strength, and also the phase (chemical) homogeneity of the layers in the welding zone is violated. Joints of the thermobimetals were tested with an ultrasonic flow detector. The structure of the welding zone was investigated by optical and electron microscopy on a metallographic section. The toughness of layers during breaking off was determined on ring samples. Tests on lateral bending and bending of the cladding layer inside were carried out. The optimum mode providing the explosive welding in the solid phase with 100% continuity of the adhesion layers and toughness of layers during breaking off at the level of the strength of brass and the high-grade structure of the weld zone was determined.

中文翻译：

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爆炸焊接参数对黄铜-殷钢热双金属界面结构的影响

摘要

实验研究了Invar 36N黄铜L63爆炸焊接的运动学参数对热双金属级TB 1353（TB 130/17）的层质量和焊接区结构的影响。结果表明，由于包含可熔成分（锌）的合金L63被用作热双金属中的活性层，因此在选择焊接方式时应考虑防止“喷射”效应。在这种情况下，高压的冲击压缩气体流以高速在间隙中移动，并处于低熔点阶段。因此，连接的强度会降低，直到强度完全丧失，而且还会破坏焊接区域中各层的相（化学）均匀性。用超声波流量检测仪测试热双金属的接头。通过光学和电子显微镜在金相截面上研究了焊接区的结构。在环样品上测定断裂时各层的韧性。进行了横向弯曲和包层内部弯曲的测试。确定了在黄铜的强度和焊接区域的高级结构水平下为固相中的爆炸焊接提供100％的粘合层连续性和断裂时各层的韧性的最佳模式。