On other hand, because Fe exists as dilution in the system and there is special environment of heat transfer during foundry process, the igniting time activating reaction inside the layer is rather long.

• 但由于体系内"稀释"剂的存在以及液态成形热交换的特殊环境,表面复合层体系内燃烧反应的点火延迟时间较长。