应用SPC对济钢理化检测质量的评价分析

Evaluation and Analysis of Jinan Steel’s Physical and Chemical Testing Quality by SPC

应用SPC控制图工具,通过交叉试验和嵌套试验对济钢理化检测系统进行评价,结果表明,济钢理化检测系统处于稳态并具有良好的线性,满足位置变差接受准则;化学检测GRR为11.87%～23.75%,力学检测GRR为19.78%～27.00%,满足宽度变差接受准则。根据重复性和再现性分析确定的改进重点采取相应的改进措施后,化学检测GRR为6.98%～13.26%,力学检测GRR为11.67%～11.97%,误差在合理范围内,出具数据满足可靠性要求。

Through cross tests and nested test, Jinan Steel’s Physical and Chemical Testing System was evaluated by use of SPC control chart. The results showed that the Testing System was in stable state and had good linearity, the GRR of the chemical testing was between 11.87% and 23.75% and the physical testing GRR was between 19.78% and 27.00%, then, met the accept criteria of location variation and width variation. According to the improvement emphases decided by the repeatability and reproducibility analyses, some corresponding improvement measures were implemented. After the improvements, the GRR of the chemical testing was between 6.98% and 13.26% and the physical testing GRR was between 11.67% and 11.97%. Therefore the error was in reasonable range and the data met the requirement of reliability.