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英国剑桥大学TWI（原先的焊接学院）开发了一种插入摩擦焊技术以焊接不同硬度的材料。该工艺是将一种硬性材料浸入较软的材料里，然后旋转硬性部分。按照TWI．两种材料摩擦所产生的热，使较软材料局部区域达到热塑性状态。塑性材料流到硬性材料周围的区域。当停止转动时，焊件
TWI (formerly Welding Institute) at Cambridge University in the UK has developed an insert friction welding technique to weld materials of different hardness. The process involves dipping a hard material into a softer material and then rotating the hard part. Follow TWI. The heat generated by the friction between the two materials causes the thermoplastic material to reach a localized area of the softer material. The plastic material flows to the area around the hard material. When stopped, the weldment