Because the heat exchange ratio of steel is much lower than that of aluminum alloys,HAZ only occurs for high strength steels with much smaller width and strength reduction.

• 而对于钢结构,由于其热导率比铝材小得多,因此只有高强钢才可能产生强度降低的热影响区,而且其强度的降低没有铝合金显著,热影响区宽度也比铝合金小得多。