The cooling efficiency of aluminum die-casting molds is critical to prevent soldering, extend mold life and manufacture high quality castings. In this paper, we discuss a method of inserting a pure copper (Cu) lining using explosive expansion bonding process. A pure Cu bush was inserted into a cooling channel of die casting mold and bonded to the inner surface of the cooling channel through explosive bonding technology to form a copper lining in the cooling channel to improve the cooling performance of high pressure die casting (HPDC) mold fabricated from SKD61 material. Furthermore, the microstructure and mechanical properties of the bonding zone between the SKD61 tool steel and pure Cu lining were analyzed. By changing the thickness of the Cu bush, stand-off distance between the Cu bush and the predrilled cooling hole, and mold heat treatment sequence, the optimal explosive bonding process parameters were established for these cases. A high-frequency induction heating-cooling system was used to examine, the performance of the cooling channel sample bonded with pure copper lining, and it was confirmed that the cooling rate was improved by 12 %. After inserting the pure copper lining into the cooling channel for a practical die casting application, it was confirmed that the mold temperature was lowered, and soldering was prevented. The explosive bonding technology used in this study is an effective method to bond pure copper lining onto the inner surface of a cooling channel, thereby providing an alternative approach to increasing the cooling efficiency.

铝压铸模具的冷却效率对于防止焊接、延长模具寿命和制造高质量铸件至关重要。在本文中，我们讨论了一种使用爆炸膨胀粘合工艺插入纯铜 (Cu) 衬里的方法。将纯铜衬套插入压铸模具的冷却通道中，通过爆炸结合技术与冷却通道的内表面结合，在冷却通道内形成铜衬，以提高高压压铸（HPDC）的冷却性能模具由 SKD61 材料制成。此外，分析了SKD61工具钢与纯铜衬里结合区的组织和力学性能。通过更改铜衬套的厚度，铜衬套和预钻孔冷却孔之间的间隔距离，和模具热处理顺序，为这些情况建立了最佳爆炸粘合工艺参数。采用高频感应加热-冷却系统检测纯铜衬里粘结冷却水道试样的性能，证实冷却速度提高了12%。将纯铜内衬插入冷却通道进行实际压铸应用后，证实降低了模具温度，防止了焊接。本研究中使用的爆炸粘合技术是一种将纯铜衬里粘合到冷却通道内表面的有效方法，从而提供了一种提高冷却效率的替代方法。采用高频感应加热-冷却系统检测纯铜衬里粘结冷却水道试样的性能，证实冷却速度提高了12%。将纯铜内衬插入冷却通道进行实际压铸应用后，证实降低了模具温度，防止了焊接。本研究中使用的爆炸粘合技术是一种将纯铜衬里粘合到冷却通道内表面的有效方法，从而提供了一种提高冷却效率的替代方法。采用高频感应加热-冷却系统检测纯铜衬里粘结冷却水道试样的性能，证实冷却速度提高了12%。将纯铜内衬插入冷却通道进行实际压铸应用后，证实降低了模具温度，防止了焊接。本研究中使用的爆炸粘合技术是一种将纯铜衬里粘合到冷却通道内表面的有效方法，从而提供了一种提高冷却效率的替代方法。将纯铜内衬插入冷却通道进行实际压铸应用后，证实降低了模具温度，防止了焊接。本研究中使用的爆炸粘合技术是一种将纯铜衬里粘合到冷却通道内表面的有效方法，从而提供了一种提高冷却效率的替代方法。将纯铜内衬插入冷却通道进行实际压铸应用后，证实降低了模具温度，防止了焊接。本研究中使用的爆炸粘合技术是一种将纯铜衬里粘合到冷却通道内表面的有效方法，从而提供了一种提高冷却效率的替代方法。