The remelting centre of Xingtai Steel removed the liquation carbonide in grade H13 steel successfully after one year’s technological research which means Xingtai Steel has reach to top-level in china on Liquid Chromatography for grade H13 die steel and satisfied conditions of international advanced level.
Grade H13 is the most used hot work die steel in the market now. But its liquation problem is the key restrict to replace foreign importing die steel in domestic market. Liquation carbide in this grade will cause heat fatigue so as to result in early crack. There are complicated chemical contents in liquation carbide of Grade H13. With plenty of Cr, Mo and V contents, this carbide could not be removed by normal production process. In order to overcome this problem, the technical personnel make plans actively. They exactly control temperature and forms of molten pool in remelting process by virtue of the equipment advantage of imported 2# atmosphere protecting electric slag furnace. They also adopt high temperature homogenization, multi-direction forging and other complicated heat-treatment forging technology to finally deal with this liquation carbide problem successfully.
This technical breakthrough establish a stable position for Xingtai Steel in high-end die steel market which has taken the first step to replace the same imported products.
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