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Cold crack every kind of defects in casting characteristics have?

by:BoQiao Machinery     2020-12-28
Cold crack every kind of defects in casting characteristics have? Small make up first to introduce you to nanjing, nanjing a foundry in one hundred and one hundred! 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. 【 Cold crack every kind of defects in casting characteristics 】 1. The cold cracking. After casting solidification crack at lower temperatures. Cracks often through the grain extends to the whole section. 4. Heat crack. Castings produced in the process of heat treatment of penetrating or not through the crack. The cross section are oxidation phenomenon. 3. Shrinkage cracking ( Shrinkage cracks) 。 Due to improper casting feeding, blocked or contraction crack caused by uneven. May appear in just after solidification or at lower temperatures. 2. Hot crack. Casting after coagulation, late or cracks formed under high temperature. Its section serious oxidation, without metallic luster, cracks along the grain boundaries and the development, twists and turns and irregular shape. 5. The reticular crack ( Cracks) 。 Metal mold and die casting due to thermal fatigue in alternating thermal mechanical action, formed in the cavity surface micro tortoise shell crack. Cast crack the turtle grain defects on the casting surface. 7. Cold insulation. On the casting penetration or not through, that are rounded edge cracks. More than appears on the surface of the large f that far away from the gate or thin wall, the metal flow confluence, chaplet chilling and cold iron parts. 6. The white dots ( Roak) 。 Mainly caused by precipitation of hydrogen in steel. On the longitudinal section, it presents the approximate circular or elliptic silvery white spots, so called white dots; On the cross-sectional macroscopic grinding, show for capillary crack after corrosion. 8. Pouring. A highly visible seams casting surface. Some parts of the joint fusion is bad or separate. Caused by interruption of pouring. 9. Double skin. In the filling process for liquid metal spatter or liquid level fluctuation, with subsequent metal cavity surface has solidified metal cannot, resulting from the fusion casting skin fold defects. Above is small make up to introduce about cold insulation defect of crack in casting characteristics, hope you can help to you! Want to know more details, please consult! Hotline: 020-86 22139325
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