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Malleable cast iron, cast iron with a certain chemical composition into a white blank, and then annealed cast iron, which has higher strength, plasticity and impact toughness, and can partially replace carbon steel. Malleable cast iron White cast iron is a kind of high strength and toughness cast iron obtained by graphitizing annealing treatment. With higher strength, plasticity and impact toughness, it can partially replace carbon steel. Compared with gray cast iron, malleable cast iron has better strength and plasticity, especially good low-temperature impact performance, and better wear resistance and vibration damping than ordinary carbon steel. This kind of cast iron is commonly known as malleable iron, malleable iron, malleable cast iron or ductile cast iron because of its stable plasticity and toughness. Black-hearted malleable cast iron is used for parts subject to impact or vibration and torsion loads. It is often used to manufacture automobile rear axles, spring brackets, low pressure valves, pipe joints, tool wrenches, etc. Pearlitic malleable cast iron is commonly used to manufacture wear-resistant parts of power machinery and agricultural machinery. There are examples of use in the manufacture of automobile camshafts in the world. White core malleable cast iron is rarely used due to the long time of malleable annealing (see ferritic malleable cast iron, pearlite malleable cast iron and white core malleable cast iron).
Malleable Iron Pipe Fittings
Malleable cast iron (malleable cast iron) Metal materials for automobiles. Cast iron with a certain chemical composition into a white billet. After graphitization and annealing, the graphite is mainly in the form of flocculent, flocculent, and sometimes a small amount of spherical cast iron. Compared with gray cast iron, malleable cast iron has higher strength, toughness and impact toughness. Malleable cast iron can be divided into four categories: black core malleable cast iron, pearlite malleable cast iron, white core malleable cast iron and ductile malleable cast iron according to chemical composition, heat treatment process, performance and structure. At present, more than 90% of the malleable cast iron produced in China is black-hearted malleable cast iron. The other three types of malleable cast iron are less used. Black-hearted malleable cast iron is not strong, but has good plasticity and toughness. Malleable cast iron is mainly used in automobile rear axle housings, steering mechanisms, low pressure valves, pipe joints and other parts subject to shock and vibration.
Malleable Iron Pipe Fittings. The production process of vermicular graphite cast iron is: first pouring into white cast iron, and then malleable annealing (forge annealing to decompose cementite into flocculent graphite) to obtain Malleable Iron Pipe Fittings.
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