| Computer aided design of free-machinability prehardened mold steel for plastic |
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| 作者姓名： | 何燕霖 李麟 高雯 王庆亮 吴晓春 |
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| 作者单位： | [1]SchoolofMaterialsScienceandEngineering,ShanghaiUniversity,Shanghai200072,China [2]ShanghaiNo.5SteelCoLtd,ShanghaiBaoshanSteelGroupCo,Shanghai200940,China |
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| 摘 要： | In order to improve the machinability but not to impair other properties of the prehardened mold steel for plastic, the composition was designed by application of Thermo-Calc software package to regulate the type of nonmetallic inclusion formed in the steel. The regulated non-metallic inclusion type was also observed by SEM and EDX. Then the machinability assessment of the steel with designed composition under different conditions was studied by the measurement of tool wear amount and cutting force. The results show that the composition of free cutting elements adding to mold steel for plastic can be optimized to obtain proper type of non-metallic inclusion in the aid of Thermo-Calc, compared with the large volume fraction of soft inclusion which is needed for promoting ductile fracture at low cutting speeds, the proper type of inclusion at high cutting speeds is glassy oxide inclusion. All those can be obtained in the present work.
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| 关 键 词： | 非金属杂质 型模钢 塑料预硬化 热-钙软件包 |
Computer aided design of free-machinability prehardened mold steel for plastic |
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| HE Yan-lin,LI Lin,GAO Wen,WANG Qing-liang,WU Xiao-chun.Computer aided design of free-machinability prehardened mold steel for plastic[J].Transactions of Nonferrous Metals Society of China,2005,15(2):437-442. |
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| Authors: | HE Yan-lin LI Lin GAO Wen WANG Qing-liang WU Xiao-chun |
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| Abstract: | In order to improve the machinability but not to impair other properties of the prehardened mold steel for plastic, the composition was designed by application of Thermo-Calc software package to regulate the type of nonmetallic inclusion formed in the steel. The regulated non-metallic inclusion type was also observed by SEM and EDX. Then the maehinability assessment of the steel with designed composition under different conditions was studied by the measurement of tool wear amount and cutting force. The results show that the composition of free cutting elements adding to mold steel for plastic can be optimized to obtain proper type of non-metallic inclusion in the aid of Thermo-Calc, compared with the large volume fraction of soft inclusion which is needed for promoting ductile fracture at low cutting speeds, the proper type of inclusion at high cutting speeds is glassy oxide inclusion. All those can be obtained in the present work. |
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| Keywords: | prehardened mold steel for plastic machinability Thermo-Calc software package non-metallic inclusion |
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