High-strength and high-toughness H13 die steel for aluminum extrusion and preparation method thereof

• Main Authors: CHEN WENXIONG, WU ZHIWEI, WU XUETING, YIN SHIWEI
• Format: Patent
• Language: Chinese; English
• Published: 04.04.2023
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; FORGE FURNACES; FORGING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HAMMERING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PRESSING METAL; PUNCHING METAL; RIVETING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a preparation method of high-strength and high-toughness H13 die steel for aluminum extrusion. The preparation method comprises the following steps: smelting molten steel according to a certain chemical component proportion; refining the smelted molten steel until the molten steel is smelted into cast ingots; the cast ingot is put into a furnace to be subjected to staged heating; performing fast forging on the cast ingot subjected to staged heating, wherein the fast forging comprises drawing out after sectional upsetting; carrying out precision forging on the bar subjected to fast forging; according to the technology, strip segregation in the die steel is effectively reduced, the size of generated carbide particles is obviously reduced, the roundness is obviously improved, the hardness of the die steel is improved, and the yield of the die steel is improved. Therefore, the strength and toughness of the prepared die steel are improved, and the service life of the die is prolonged. 本发明公开