Thermal treatment process of 8DeOp die steel

• Main Author: CHEN QINGLU
• Format: Patent
• Language: Chinese; English
• Published: 27.06.2017
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

The invention discloses a thermal treatment process of 8DeOp die steel. The thermal treatment process includes the following steps: 1) preparing a box-type resistance furnace, and placing five 8DeOp steel bars, as one group, into the box-type resistance furnace; 2) gradually heating the furnace to 830-850 DEG C and maintaining the temperature for 10 min, and then applying a 100-110 Hz saw tooth wave for 5-8 min, electric field being 800V; 3) discharging the steel bars out from the furnace, and performing isothermal quenching in a nitrate quenching trough having magnetic field for 2 h; and 4) performing tempering for two times at 250-280 DEG C, each time lasting for 2 h. The thermal treatment process is simple, can improve various performances of the 8DeOp die steel and is reduced in process time. 本发明公开了种8DeOp模具钢热处理工艺，包括如下步骤，（1）准备好箱式电阻炉，将8DeOp钢5根作为组，放入到箱式电阻炉中；（2）逐步加热到830-850℃，保温10min，然后施加100-110HZ，800V电场锯齿波5-8min；（3）出炉后放到具有磁场的硝盐淬火槽中进行等温淬火，保温2h；(4)在250-280℃下进行2次回火，每次时间为2h。该热处理工艺方法简单，能够提高8DeOp模具钢各方面的性能，缩短了工艺时间。