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Spheroidal graphite cast iron-based composite material and method for preparing composite winding drum

A composite material and ductile iron technology, which is used in casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low wear resistance of ductile iron, restricting the use range of ductile iron castings, and poor bonding between reinforcement and ductile iron. , to achieve the effect of improving toughness

Active Publication Date: 2018-02-02
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the wear resistance of ductile iron is low, which greatly restricts the scope of use of ductile iron castings
Many scholars use high chromium cast iron - nodular cast iron, three-dimensional network Al 2 o 3 Reinforced ductile iron-based composite materials and other means, although some effects on the improvement of the wear resistance of ductile iron, but there is a defect that the reinforcement and ductile iron are poorly bonded

Method used

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  • Spheroidal graphite cast iron-based composite material and method for preparing composite winding drum

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preparation example Construction

[0026] The concrete steps of the preparation method of black cast iron-based composite material of the present invention are as follows:

[0027] S1. Make Ti powder, Zr powder, Ta powder and W powder with a particle size of 10-50 microns according to the atomic ratio of 3:3:2:2 to make alloy powder and mix it with inorganic salt solution evenly, and coat it into the mold as required strengthened parts;

[0028] Wherein, the mass ratio of the alloy powder particles to the inorganic salt is 1:3, and the inorganic salt is mainly composed of an aqueous solution of borax and water glass, and the concentration is 10% by mass of borax and 1.5% by mass of water glass.

[0029] S2. Preheating the plated mold in an oven, so that the alloy powder particles are connected to each other to form a porous prefabricated body;

[0030] S3. Pouring the nodular cast iron molten metal by casting infiltration process, and obtaining the nodular cast iron-based composite reel after cooling.

[0031...

Embodiment 1

[0038] 1) Mix the alloy powder with a particle size of 10-50 microns and inorganic salt evenly, and apply it to the part of the mold that needs to be strengthened;

[0039] 2) preheating the plated mold in an oven, so that the alloy powder particles are connected to each other to form a porous prefabricated body;

[0040] 3) The nodular cast iron molten metal is poured using the casting infiltration process, the quenching temperature is 1050°C, the stress relief annealing temperature is 200°C, and the nodular cast iron-based crane drum is obtained after cooling.

Embodiment 2

[0042] 1) Mix the alloy powder with a particle size of 10-50 microns and inorganic salt evenly, and apply it to the part of the mold that needs to be strengthened;

[0043] 2) preheating the plated mold in an oven, so that the alloy powder particles are connected to each other to form a porous prefabricated body;

[0044] 3) The nodular cast iron molten metal is poured using the cast infiltration process, the quenching temperature is 1180°C, the stress relief annealing temperature is 300°C, and the ductile iron-based hoisting reducer reel is obtained after cooling.

[0045] Ceramic particles reinforced metal matrix composites combine the advantages of good plasticity, impact toughness, and easy molding of metals, as well as the high strength, high hardness, and high wear resistance of ceramic particles. During the abrasive wear process of the composite roll, the wear resistance of the matrix alloy can be improved due to the presence of high hardness reinforcements.

[0046] s...

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Abstract

The invention discloses a spheroidal graphite cast iron-based composite material and a method for preparing a composite winding drum. A substrate alloy is composed of the following components of, by mass, 3.5-4.0% of C, 2.2-2.7% of Si, 0.3-0.8% of Mn, 1.3-1.7% of Ni, 0.5-0.9% of Cu, 0.2-0.5% of Mo, 0.02-0.08% of Re, 0.03-0.06% of Mg, 0.2-0.3% of Ti, less than or equal to 0.07% of P, less than or equal to 0.02% of S and the balance Fe and other unavoidable impurities. By adopting an advanced resin sand production line and an electric-furnace smelting technology, surface alloying is achieved through a cast infiltration technology to replace heat treatment surface strengthening, the elements of titanium, zirconium, tantalum and tungsten are evenly mixed with inorganic salt to be fixed in a casting mold, metal liquid is casted, and the composite winding drum is obtained after cooling and unpacking. The spheroidal graphite cast iron-based composite material and the method for preparing thecomposite winding drum can improve the toughness and the surface hardness of the spheroidal graphite cast iron composite winding drum, and can prolong the service life of the spheroidal graphite castiron composite winding drum.

Description

technical field [0001] The invention belongs to the technical field of preparation of wear-resistant materials, and in particular relates to a nodular cast iron-based composite material and a method for preparing a composite reel. Background technique [0002] The high-performance reel is one of the key components of large-scale cranes and hoisting reducers. Since the load-bearing wire rope is directly wound on the reel, the reel directly bears the lifting load, and its quality has a great impact on the safe operation of the crane and hoisting reducer has a vital impact. [0003] Ductile iron is a kind of engineering material with low cost and relatively high yield strength. Because its graphite is spherical, it reduces the splitting effect on the matrix and reduces the sensitivity of the notch. It is usually used to manufacture some large-load, subject- Force complex parts. However, the wear resistance of ductile iron is low, which greatly restricts the scope of use of du...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C37/04B22C3/00B22D27/18
Inventor 李烨飞陈志刘宪民刘庆坤高义民袁鹤鹤刘志伟郑巧玲
Owner XI AN JIAOTONG UNIV
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