Treatment method for improving performance of die steel SDH13
A processing method and technology for die steel, applied in the field of alloy heat treatment, can solve the problems affecting the grain size of die steel material, the transverse non-notch impact of annealed structure, the average impact energy not reaching the ideal level, and the service life of hot work die steel. lower problem
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Embodiment 1
[0032] A treatment method for improving the performance of die steel SDH13, comprising the following process steps:
[0033] a. Add the 20-inch SDH13 steel ingot obtained by electric furnace casting into a high-temperature diffusion furnace preheated to 600°C, raise the temperature to 1220°C at a heating rate of 100°C / h, and keep it at 1220°C for 32 hours, and then cool with the furnace to 1200°C, and kept at 1200°C for 2 hours, and then the forging was obtained; the chemical element composition of the SDH13 steel ingot includes C: 0.38%, Si: 0.3%, Mn: 0.4%, P: 0.01%, S : 0.001%, Cr: 5%, Mo: 1.5%, V: 0.6%, Ni: 0.1%, Cu: 0.04% and the balance Fe.
[0034] b. Carry out two times of upsetting and drawing forging to the obtained forging, and the upsetting ratio of each time of upsetting and drawing forging is 2, and the forged product is obtained, and its specification is a bar of φ200mm;
[0035] c. Control the temperature of the forged product above 850°C, add it to water for r...
Embodiment 2
[0045] A treatment method for improving the performance of die steel SDH13, comprising the following process steps:
[0046] a. Put the 20-inch SDH13 steel ingot obtained by electric furnace casting into the high-temperature diffusion furnace preheated to 550°C, raise the temperature to 1250°C at a heating rate of 90°C / h, and keep it at 1250°C for 30h, and then cool with the furnace to 1180°C, and kept at 1180°C for 3 hours, and then the forging was obtained; the chemical element composition of the SDH13 steel ingot includes C: 0.35%, Si: 0.1%, Mn: 0.3%, P: 0.008%, S : 0.002%, Cr: 4.8%, Mo: 1.4%, V: 0.4%, Ni: 0.2%, Cu: 0.042% and the balance Fe.
[0047] b. The obtained forging is subjected to 2 times of upsetting and drawing, and the upsetting ratio of each time of upsetting and drawing forging is 2.1, and the forged product is obtained, and its specification is a bar of φ200mm;
[0048] c. Control the temperature of the forged product to 900°C, add it to water for residual ...
Embodiment 3
[0058] A treatment method for improving the performance of die steel SDH13, comprising the following process steps:
[0059] a. Add the 20-inch SDH13 steel ingot obtained by electric furnace casting into a high-temperature diffusion furnace preheated to 650°C, raise the temperature to 1280°C at a heating rate of 110°C / h, and keep it at 1280°C for 28 hours, and then cool with the furnace to 1200°C, and kept at 1200°C for 1 hour, and then the forging was obtained; the chemical element composition of the SDH13 steel ingot includes C: 0.4%, Si: 0.4%, Mn: 0.6%, P: 0.009%, S : 0.0015%, Cr: 5.25%, Mo: 1.7%, V: 0.7%, Ni: 0.17%, Cu: 0.05% and the balance Fe.
[0060] b. The obtained forging is subjected to three upsetting and drawing forgings, and the upsetting ratio of each upsetting and drawing forging is 2.2 to obtain a forged product, and its specification is a bar of φ200mm;
[0061] c. Control the temperature of the forged product to be 910°C, add it to water for residual heat q...
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