Quenching method of die and manufacture method of die
A mold and mold heating technology, applied in the direction of manufacturing tools, heat treatment equipment, furnaces, etc., can solve problems such as easy cracks, achieve the effect of suppressing cracks and maintaining toughness
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[0041] The hot working tool steel of Japanese JIS-SKD61 improved material is used as the raw material to make a square of 300mm×300mm×300mm. Milling is performed on the entire surface of the block. The martensite transformation point (Ms point) of this raw material is 285°C. Next, the block was processed to form a concave groove with a depth of 100 mm and a width of 50 mm corresponding to the product shape surface of the mold, thereby forming a groove that imitated the shape of the mold. Figure 7 Sample for quenching. The corner of the groove bottom was processed so that the R (radius of curvature) of the corner was 1 mmR on one side and 3 mmR on the side opposite to the side. In addition, from the center of the groove bottom toward the back of the sample, the position C (that is, the core of the sample) at a depth of 90 mm and the position S (that is, the actual back of the sample) at a depth of 195 mm In the center of the ), an...
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