Three-body type composite casting wear-resistant lining plate and manufacturing method thereof
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A composite casting and manufacturing method technology, applied in the field of steelmaking, can solve the problems of insufficiency of casting stress, hidden dangers left by installation and application, and the combination is not very smooth, so as to achieve both environmental benefits, outstanding comprehensive mechanical properties, improved casting performance and The effect of mechanical properties
Active Publication Date: 2022-05-13
武汉市科发铁合金有限公司
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[0004]
However, many disadvantages have been found in the manufacturing and application process of the bimetallic wear-resistant lining plate formed in this way, and it is necessary to optimize it in the implementation process
[0005]
First of all, the surface layer is made of anti-wear white cast iron, and the back layer is made of medium and low carbon steel. One is iron and the other is steel. The carbon content of the two is very different, the structure is different, the phase diagram is different, and the melting at high temperature produces differences. There is a certain degree of difficulty, it is easy to form a barrier, and it cannot be seamlessly connected after solidification and cooling, resulting in cracks and e
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Embodiment 1
[0034] A three-body composite casting wear-resistant liner, including a back layer, a transition layer and a surface layer arranged in sequence, wherein the back layer is made of medium and low carbon steel, the filter layer is made of ferritic ductile iron, and the surface layer is made of Made of high chromium molybdenum anti-wear white cast iron, please refer to the attached structure diagram figure 1 .
[0035] The mass fraction percentage components of medium and low carbon steel are: C: 0.3~0.4w%, Si: ≤0.50w%, Mn: ≤0.90w%, S: ≤0.04w%, P: ≤0.04w%, the balance For Fe. The mechanical properties of medium and low carbon steel are shown in Table 1.
[0036] Table 1
[0037]
[0038] The mass fraction percentage components of high chromium molybdenum anti-wear white cast iron are: C: 2.0~3.0w%, Si: ≤1.0w%, Mn: 0.5~1.0w%, Cr: 13.0~18.0w%, Mo: 0.5 ~2.5w%, Ni: 0~1.0w%, Cu: 0~1.2w%, S: ≤0.06w%, P: ≤0.10w%, and the balance is Fe. The HCR after heat treatment is ≥ 55, and th...
Embodiment 2
[0044] A method for manufacturing a three-body composite cast wear-resistant liner, comprising the following steps:
[0045] S1. Casting: Three medium-frequency induction furnaces are used to smelt medium and low carbon steel, ferritic ductile iron and high-chromium-molybdenum anti-wear white cast iron respectively. The ferritic ductile iron is spheroidized and inoculated during smelting; After the smelting is completed, first pour medium and low carbon steel, solidify and crystallize, then pour ferritic ductile iron, solidify and crystallize, and finally pour high chromium molybdenum anti-wear white cast iron, solidify, crystallize and cool to obtain three Integral compound casting anti-wear lining blank material; ferritic nodular cast iron nodularization treatment process adopts the method of pouring into the bag, and inoculation treatment is carried out at the same time as nodularization treatment, which specifically includes the following steps:
[0046] S11, charging: acc...
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Abstract
The invention provides a three-body type composite casting wear-resistant lining plate which comprises a back layer, a transition layer and a surface layer which are arranged in sequence, the back layer is made of medium and low carbon steel, a filter layer is made of ferritic nodular cast iron, and the surface layer is made of high-chromium molybdenum wear-resistant white cast iron. According to the wear-resistant lining plate, the transition layer is additionally arranged between the surface layer high-chromium-molybdenum wear-resistant white cast iron and the back layer medium-low carbon steel, so that the wear-resistant lining plate not only has wear resistance, but also can endure a violent impact working condition, the adhesion between the layers is better, and the casting technological process is simplified; the invention further provides a manufacturing method of the three-body type composite casting wear-resistant lining plate, the ideal three-body type composite casting wear-resistant lining plate can be obtained, the shrinking percentage is in smooth transition, combination is tight and natural, casting stress is greatly reduced, and casting defects are remarkably reduced; and then the three-body type composite casting wear-resistant lining plate blank is subjected to quenching and tempering treatment, so that the three-body type composite casting wear-resistant lining plate has better mechanical properties.
Description
technical field [0001] The invention relates to the technical field of steelmaking, in particular to a three-body composite cast wear-resistant liner and a manufacturing method thereof. Background technique [0002] Due to its unique and excellent performance, bimetallic wear-resistant linings are getting more and more attention and applications. Two metal materials with different properties are casted to form a complete casting. The surface layer (working surface) is made of wear-resistant alloy material, which has strength and hardness, and the back layer is made of non-brittle metal material, which has plasticity and toughness, which complement each other and complement each other. [0003] The traditional upper layer material is high chromium molybdenum anti-wear white cast iron with HRC ≥ 55, and the back layer material is medium and low carbon steel. In this way, the bimetallic lining combines the advantages of the two. Under the premise of not breaking or breaking, t...
Claims
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