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用TEM研究了γ/α不锈钢、铜/碳钢和黄铜/不锈钢三对不同金属爆炸焊的结合层。观察表明爆炸焊是通过接触面之间的扩散及局部熔化实现的。结合层的组织不仅和两侧金属的成分有关,还与它们的热导、熔点及再结晶温度的差别有关。由于熔区小,冷却速度快,可得到非晶、微晶,形成稳定相或亚稳相等不同组织。扩散层很薄,从几个原子距离到10~(-1)μm量级。如两种金属的热导及再结晶温度相差较大,则再结晶和回复区在热导好、再结晶温度低的一侧比另一侧清楚。形变区的组织与晶体结构及层错能有关。
TEM was used to study the bonding of three pairs of different metal explosive welding with γ / α stainless steel, copper / carbon steel and brass / stainless steel. Observations show that explosive welding is achieved by diffusion and local melting between the contact surfaces. The texture of the bond layer is not only related to the composition of the metal on both sides, but also to the difference in their thermal conductivity, melting point and recrystallization temperature. Due to the small melting zone, cooling speed, can be amorphous, microcrystalline, forming stable phase or metastable equal to different organizations. The diffusion layer is very thin, ranging from several atoms to the order of 10 ~ (-1) μm. If the two metals differ greatly in their thermal conductance and recrystallization temperatures, then the recrystallization and recovery zones are good at heat conduction and the side of the recrystallization temperature lower than the other side is clear. Deformation of the organization and the crystal structure and fault can be related.