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通过反复对比和分析认为21—2N钢采用1170℃的保温固溶处理和760℃的时效处理是最为合理和经济的。
Through repeated comparison and analysis, it is considered that 21-2N steel is the most reasonable and economical to adopt 1170 ℃ heat treatment solution treatment and 760 ℃ aging treatment.