Introduced the features of 1.2738 steel

    The 1.2738 steel using advanced die steel refining technology, is a vacuum melting Cr-Ni-Mo alloy steel. The features of 1.2738 steel: The steel has excellent polishing and photo-etching performance; excellent machinability; good wear resistance; large mold hardness is uniform, dense tissue; no quenching crack and deformation of heat treatment of risk, without heat treatment, shorten the molding cycle; surface nitriding performance can be good; flame surface hardening treatment, to improve the surface hardness and wear resistance of the die. Die before quenching, must be fully softening annealing. Should be timely tempering after quenching, slow heating.
    In the late precision electrical discharge machining, shall be conducted in small current, high frequency, so as not to damage the mould. After discharge the mold surface should be removed "electric spark grinding white layer", followed by a second tempering at 500 ℃, to remove stress.
    For grinding machining of the mold after tempering, in order to prevent softening of surface, grinding crack, should be noted: sufficient cooling; suitable grinding pressure; reasonable processing technology.
    The 1.2738 steel has good polishing performance, usually by alumina or gypsum polishing. The first is the rough polishing, and then polished with fine abrasive, every change once abrasives, polishing the direction you want to change, and ultimately a polishing time not too long, otherwise it will affect the roughness of the surface of the mold.
    Nitriding can increase the mould surface hardness, improve the wear resistance and corrosion resistance. Although the steel has been pre-hardening treatment, but still can enhance the hardness by heat treatment.

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