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据英国《金属文摘》1992年第9期(月刊)报道,欧共体公布批准了一项用碳氮共渗热处理工艺强化装甲钢板表面,改善装甲钢板综合性能的专利,专利号为EP0403564。
According to the British “Metal Abstracts” 1992 9 (monthly) reported that the European Community announced the approval of a carbonitriding heat treatment process to strengthen the surface of armored steel, armor plate to improve the overall performance of the patent No. EP0403564.