Steel quality superior, technology guaranteed & ndash;
Nanjing foundry co. , LTD. , the mechanical properties of casting
steel cast steel is higher than cast iron, but its worse than cast iron casting performance.
As a result of the cast steel high melting point, easy oxidation of liquid steel, large steel illiquid, shorten, shorten the body at a rate of 10 ~ 14%, reduced to 1.
8 ~ 2.
To avoid steel pouring lack, cold insulation, shrinkage cavity and shrinkage, crack and adhering sand faults, it is necessary to adopt process than cast iron mixed and disorderly measures: due to poor liquidity of molten steel, and the lack of water, to avoid casting cold-lap steel wall thickness not less than 8 mm;
The structure of the gating system to a brief, and the section dimension is bigger than cast iron;
Use dry mold or hot mould;
Proper pouring temperature, progress is commonly 1520 & deg;
Due to their high pouring temperature, liquid steel superheat, insist on a long time, liquidity can be improved.
But the water temperature is too high, can lead to coarse grains, such as hot cracking, porosity and adhering sand faults.
Thus generally small, thin wall and the shape of castings, the pouring temperature is about steel melting point temperature of + 150 ℃;
Large, thick wall castings pouring temperature about 100 ℃ higher than the melting point.
Nanjing foundry co. , LTD. , the history of professional strength and modern management mode to achieve the excellent complementary and fusion, through constant innovation and development, now has luxuriant turned, coruscate gives new vitality, casting products with annual production heat resistant, wear resistant cast steel, carbon steel, low alloy steel casting, grey iron castings, ductile iron parts, stainless steel castings and all kinds of large and medium-sized castings 80000 tons of capacity, is the domestic market competitiveness of the cast steel, cast iron, stainless steel castings and profile production base.
Address: new wu district, nanjing, jiangsu province bonanza road 200 hotline: 020-86
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