What is the difference between imported mold and domestic steel
Comprehensive, mould life affected by various factors, imported steel in steelmaking technology, equipment, materials, smelting and forging technology, equipment, especially on the heat treatment process and equipment than domestic is has certain advantages, so the die life is higher and life is very stable. Currently used H13 die steel market is very chaotic, boasts, NAK80, 718 mostly imported materials, but according to my working experience for more than a decade, estimate of fraud in more than 50% (conservative estimate) Domestic at present commonly used die steel material, good is five, baosteel, fushun, zhongyuan special steel producers, such as smelting process in general vacuum arc furnace + + + electroslag refining heavy dissolved, the life of the small size mold and stability has been achieved and imported steel the same level. I personally feel that the big steel mills in China are not very serious at the moment, and they are too small in the promotion and development of the products.
Look not to come out from the appearance, warranty can be divided, but did not rule out the JS, use should be able to separate, but does not rule out the use of high quality domestic steel service life is better than imported steel and when selling imported steel.
One, the biggest difference is the price of imported materials is high, commonly in domestic material more than double. Second, steelmaking technology perspective, foreign well-known steel material generally purity of molten steel is higher, P, S, and five element content is low, low gas content, is simply less impurity. From the forging point of view, the imported mould steel is generally good, the forging pressure is bigger than the big, simply it is the uniform and transparent of forging. Four terms, heat treatment, the overseas research and development efforts, compare the commonly used die steel are basically developed abroad, so the heat treatment craft is advanced, and the equipment is advanced.
