奥贝球墨铸铁力学性能综合指标模糊数学评价法

Synthetic Evaluation on Indices of Mechanics Properties of Ductile Iron by Fuzzy Mathematics

分析了奥贝球墨铸铁在不同奥氏体化温度参数ATP,奥氏体化时间参数AtP,等温温度参数ITP和等温时间参数ItP等热处理条件下力学性能的技术指标,提出了奥贝球铁力学性能指标模糊数学综合评价方法,通过大量计算得出了综合评价结果。计算结果表明,力学性能在奥氏体化温度920℃,奥氏体化时间90 min等温温度380和等温时间60 min时综合指标最好,在奥氏体化温度940℃,奥氏体化时间30 min等温温度350℃和等温时间120 min时综合指标最差。本文研究结果为进一步研究球墨铸铁力学性能和新性能球墨铸铁提供了重要的依据。本评价方法对于工程技术方案评价也具有实用价值。

The technical indices of mechanics properties of ductile iron with different heat treatment parameters have been researched.The synthetic evaluating method by fuzzy mathematics on those indices has been offered.The evaluating result of technical indices of mechanics properties has been obtained with lot of calculation,resulting in that the best mechanics property occured in conditions of austempering temperature 920 ℃,austempering holding time 90 min,isothermal temperature 380 ℃and isothermal holding time 60 min while the worst occured with austempering temperature 940 ℃,austempering holding time 30 min,isothermal temperature 350℃and isothermal holding time 120 min.23 others samples were between them successively.The result may have an important practical signiifcance for further research of mechanics properties of ductile iron and for developing new properties of ductile iron.The evaluating method in this paper may have an important practical signiifcance for the evaluating on the other project.