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文章以N36锆合金管材试制工艺流程为对象,利用FMECA进行工艺设计优化,对工艺故障模式进行系统地识别、分析了故障模式成因及对后续工序和产品使用的影响,分析了风险优先数(RPN),建立了FMECA分析表,识别出了高RPN数值的故障模式及薄弱工艺环节。以降低RPN为目标,采取了改进措施。结果表明:(1)N36锆合金管材研制过程应用FMECA能够系统识别薄弱工艺环节,对工艺设计优化起到有效的作用;(2)FMECA分析表明,铸锭熔炼和锻造、管坯轧制等过程集中了高RPN值的故障模式,将其作为关键工艺实施工艺确认和工艺优化可降低RPN;(3)工艺设计FMECA是一个迭代过程,随试制进展应不断采取有效的改进措施。
In this paper, N36 zirconium alloy pipe prototype process flow is taken as the object, FMECA is used to optimize the process design, the process fault pattern is systematically identified, the cause of the fault mode and the impact on the subsequent processes and product use are analyzed, and the risk priority number (RPN ), A FMECA analysis table was established, identifying failure modes and weak process steps for high RPN values. To reduce the RPN as the goal, to take improvement measures. The results show that: (1) The application of FMECA in N36 zirconium alloy pipe system can systematically identify the weak process links and play an effective role in process design optimization. (2) FMECA analysis shows that the process of ingot smelting and forging, tube rolling Focusing on the failure mode with high RPN value, confirming process optimization and process optimization as a key process can reduce RPN; (3) Process Design FMECA is an iterative process, and effective improvement measures should be taken continuously with the progress of trial production.