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  • 2020-04-01 China Government interviewed with Shunhao
    China Government interviewed with Shunhao

    Shunhao factory has been serving the machines and molds to melamine tableware factories, urea tableware factories, UF toilet seat and cover factories ...

  • 2020/04/08 Rice husk tableware
    Rice husk tableware

    Rice husk tableware Introduction: Rice husk tableware is to regenerate this discarded rice husk into natural, healthy and free of any harmful chemical...

  • 2020/04/05 Rationally view the harm of melamine tableware
    Rationally view the harm of melamine tableware

    Rationally view the harm of melamine tableware 1) What is melamine tableware Melamine tableware is made from melamine powder (known in the industry as...

  • 2020/04/05 Precautions and cleaning of melamine tableware
    Precautions and cleaning of melamine tableware

    Precautions and cleaning of melamine tableware 1. Main ingredients of melamine tableware raw materials: 100% melamine (domestically called A5 material...

What is the 718# Mould steel hardened
Mar 16, 2020

718  steel hardened for Melamine Tableware Mould

In order to improve the service life of the mold to more than 800,000 mold times, the pre-hardened steel can be implemented by hardening and low-temperature tempering. When quenching, first preheat at 500-600 ℃ for 2-4 hours, and then keep it at 850-880 ℃ for a certain period of time (at least 2 hours), put it in oil to cool to 50-100 ℃, and air-cool it. The hardness can reach 50 after quenching. -52HRC, in order to prevent cracking, a low temperature tempering treatment at 200 ° C should be performed immediately. After tempering, the hardness can be maintained above 48HRC.

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