Cryogenic treatment (CT) is a relatively new field,which has emerged during the last three decades of the twentieth century.However,its impact on material shaping and making tool life,and enhancement of their mechanic...Cryogenic treatment (CT) is a relatively new field,which has emerged during the last three decades of the twentieth century.However,its impact on material shaping and making tool life,and enhancement of their mechanical properties are quite remarkable.The selection of appropriate process parameters for CT is essential for cost reduction and optimum productivity.This study focuses on the influence of key parameters of CT cycles (i.e.,soaking temperature and duration) on the friction and wear behavior of AISI H13 hot die steel under dry sliding conditions against hardened and tempered AISI D3 cold work tool steel (counter face) at varying sliding speeds and loads.Mathematical models have been developed for wear rate,the average coefficient of friction,and maximum contact temperature using the Box-Cox methodology.The developed mathematical models have been validated by comparing with the experimental results.Moreover,the optimum values of the process parameter have been employed to maximize the output and validate the same by confirmation of the experiments.To the best of our knowledge,this is the first study that demonstrates the modeling and optimization of sliding friction and wear characteristics of AISI H13 under varied CT cycles.展开更多
采用半固态成形技术(SSM)代替传统铸造来生产汽车用盒形件。基于Power Law Cut-Off(PLCO)模型和有限元模拟软件ProCast2008对盒形件半固态压铸过程建立模型并进行数值模拟,揭示了主要工艺参数对成形过程的影响规律。结果表明,在盒形件...采用半固态成形技术(SSM)代替传统铸造来生产汽车用盒形件。基于Power Law Cut-Off(PLCO)模型和有限元模拟软件ProCast2008对盒形件半固态压铸过程建立模型并进行数值模拟,揭示了主要工艺参数对成形过程的影响规律。结果表明,在盒形件半固态压铸过程中,浇注温度、冲头速度、模具加热温度有明显的影响,并进一步获得了半固态压铸的合理工艺参数。展开更多
文摘Cryogenic treatment (CT) is a relatively new field,which has emerged during the last three decades of the twentieth century.However,its impact on material shaping and making tool life,and enhancement of their mechanical properties are quite remarkable.The selection of appropriate process parameters for CT is essential for cost reduction and optimum productivity.This study focuses on the influence of key parameters of CT cycles (i.e.,soaking temperature and duration) on the friction and wear behavior of AISI H13 hot die steel under dry sliding conditions against hardened and tempered AISI D3 cold work tool steel (counter face) at varying sliding speeds and loads.Mathematical models have been developed for wear rate,the average coefficient of friction,and maximum contact temperature using the Box-Cox methodology.The developed mathematical models have been validated by comparing with the experimental results.Moreover,the optimum values of the process parameter have been employed to maximize the output and validate the same by confirmation of the experiments.To the best of our knowledge,this is the first study that demonstrates the modeling and optimization of sliding friction and wear characteristics of AISI H13 under varied CT cycles.
文摘采用半固态成形技术(SSM)代替传统铸造来生产汽车用盒形件。基于Power Law Cut-Off(PLCO)模型和有限元模拟软件ProCast2008对盒形件半固态压铸过程建立模型并进行数值模拟,揭示了主要工艺参数对成形过程的影响规律。结果表明,在盒形件半固态压铸过程中,浇注温度、冲头速度、模具加热温度有明显的影响,并进一步获得了半固态压铸的合理工艺参数。
