This work presents a detailed description of a bonding zone of explosively welded Ti/steel clads subjected to stress relief annealing, applied in order to improve the plasticity of the final product. The typical joint formed by the welding process possesses a characteristic wavy interface with melted regions observed mainly at the crest regions of waves. The interface of Ti/steel clads before and after annealing was previously investigated mostly in respect to the melted regions. Here, a sharp interface between the waves was analyzed in detail. The obtained results indicate that the microstructure of a transition zone of that area is different along the width. After the heat treatment at 600 °C for 1.5 hours, titanium carbide (TiC) together with α-Fe phase forms at the interface in local areas of relatively wide interlayer (~ 1 µm), while for most of the sharp interface, a much thinner zone up to about 400 nm, formed by four sublayers containing intermetallic phase and carbides, is present. This confirms that carbon diffusion induced by applied heat treatment significantly influences the final microstructure of the Ti/steel interface zone. Side bending tests confirmed high plasticity of welds after applied heat treatment; however, the microhardness measurements indicated that the strengthening of the steel in the vicinity of the interface had not been removed completely.

这项工作详细描述了爆炸性焊接的Ti /钢包层的结合区，该区经过了应力消除退火处理，以改善最终产品的可塑性。通过焊接工艺形成的典型接头具有特征性的波状界面，其熔融区域主要在波浪的波峰区域观察到。以前，主要针对熔化区域研究了退火前后的Ti /钢熔覆层的界面。在此，详细分析了波之间的尖锐界面。获得的结果表明，该区域的过渡区的微观结构沿宽度方向是不同的。在600°C下热处理1.5小时后，碳化钛（TiC）与α-Fe相的形式在相对宽的中间层（〜1局部区域的界面 μ米），而对于最尖锐的界面的，薄得多的区高达约400nm，通过含有金属间相和碳化物4子层形成的，是当下。这证实了通过施加的热处理引起的碳扩散会显着影响Ti /钢界面区的最终微观结构。侧面弯曲测试证实，在施加热处理后，焊缝具有很高的可塑性；然而，显微硬度测量表明，界面附近的钢的强化尚未完全消除。