Preparation technology of vanadium carbide reinforced grey cast iron base composite material

A technology of gray cast iron and composite materials, which is applied in the field of preparation technology of vanadium carbide reinforced gray cast iron-based composite materials, and can solve problems such as difficulty in obtaining integral anti-wear gray cast iron, difficulty in stably controlling the preparation process, and uneven distribution of reinforcement particles , to achieve the effect of avoiding the weakening of the enhanced phase interface, good interface bonding effect, and avoiding floating and segregation

Inactive Publication Date: 2010-05-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of hard phases such as carbides in gray cast iron, its macroscopic hardness is very low, so gray cast iron cannot resist the cutting and wear effect of abrasives on the surface of parts under wear conditions, which makes gray cast iron difficult to apply to On equipment parts subject to abrasive wear, which greatly limits its scope of use
[0003] In recent years, a composite preparation process reinforced by ceramic particles has appeared to improve the wear resistance of gray cast iron, such as placing vanadium carbide or titanium nitride particles on the bottom of the mold, and then pouring gray cast iron, but the preparation process is difficult to control stably , the distribution of reinforcement particles is uneven, and it is still difficult to obtain an overall wear-resistant gray cast iron with uniform reinforcement distribution.
There are also hard particles such as vanadium carbide solidified with a binder, put into the mold, and then pour the molten metal to make the hard particles and the molten metal penetrate and fuse with each other. However, due to the decomposition of the binder at high temperature, a large amount of gas is generated. Lead to the formation of many pores inside the composite layer, the effect is not ideal

Method used

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  • Preparation technology of vanadium carbide reinforced grey cast iron base composite material
  • Preparation technology of vanadium carbide reinforced grey cast iron base composite material
  • Preparation technology of vanadium carbide reinforced grey cast iron base composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Making an integral composite material blanking liner

[0030] Such as figure 1 , figure 2 , image 3 with Figure 4 As shown, the specific operation steps are as follows:

[0031] (1) weaving vanadium wire mesh 1 with 0.5mm vanadium wire, the vanadium wire spacing is 2mm;

[0032] (2) Vanadium wire mesh 1 is cut into a rectangle according to the length and height specifications of the blanking liner;

[0033] (3) pickling the rectangular vanadium wire mesh 1;

[0034] (4) Make mold 2 according to casting process requirements;

[0035] (5) stack the vanadium wire mesh 1 multilayer that has been cut, and place it into the mold cavity of the water glass sand mold 2;

[0036] (6) smelting gray cast iron 3 to obtain liquid gray cast iron;

[0037] (7) pouring the liquid gray cast iron 3 into the mold by adopting the gravity casting method, so that the liquid gray cast iron fills the gaps of the mesh-like three-dimensional skeleton, and obtains a vanadium ...

Embodiment 2

[0041] Example 2: Making partial composite material blanking liner

[0042] Such as figure 1 with Figure 5 As shown, the specific operation steps are as follows:

[0043] (1) Weave vanadium wire mesh 1 with 2.0mm vanadium wire, and the vanadium wire spacing is 10mm;

[0044] (2) Vanadium wire mesh 1 is cut into a rectangle according to the length of the blanking liner and half the height specification;

[0045] (3) Pickling the rectangular vanadium wire mesh;

[0046] (4) Make mold 2 according to casting process requirements;

[0047] (5) stack the vanadium wire mesh (1) that has been cut in multiple layers, and place it into the cavity of the water glass sand mold 2;

[0048] (6) smelting gray cast iron 3 to obtain liquid gray cast iron;

[0049] (7) pouring the liquid gray cast iron 3 into the mold by adopting a gravity casting method to obtain a partial vanadium wire-gray cast iron binary material prefabricated body;

[0050] (8) After cooling and stripping and clea...

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Abstract

The invention discloses a preparation technology of vanadium carbide reinforced grey cast iron base composite material, mainly comprising the following steps: weaving a vanadium wire mesh with vanadium wires; preparing mesh-type three-dimensional skeleton structure by tailoring, rolling by layers or overlying; manufacturing a casting mold according to casting technique; putting the vanadium wire mesh-type three-dimensional skeleton into a casting mold cavity in advance; smelting grey cast iron, and pouring liquid grey cast iron into the casting mold cavity to obtain a vanadium wire-grey cast iron binary material prefabricated body; putting the vanadium wire-grey cast iron binary material prefabricated body into a thermal treatment furnace to obtain vanadium carbide reinforced grey cast iron base composite material. The composite material prepared with the method fully performs high wear-resisting property of vanadium carbide hard phase as well as favourable ductility, convenient regulation and control and reliable technology of grey cast iron, solves the problems of incomplete reaction of composite material, uneven wild phase particle distribution, weakened wild phase interface pollution and the like, and can be widely applied to the wear-resisting fields of mines, electric power, metallurgy, coal, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, in particular to a preparation process for vanadium carbide reinforced gray cast iron-based composite materials. Background technique [0002] Gray cast iron is cheap and is the most widely used cast iron. It is generally used to manufacture brackets, gearboxes, valve bodies, bearing seats and other parts. However, due to the lack of hard phases such as carbides in gray cast iron, its macroscopic hardness is very low, so gray cast iron cannot resist the cutting and wear effect of abrasives on the surface of parts under wear conditions, which makes gray cast iron difficult to apply to Equipment parts subject to abrasive wear greatly limit its scope of use. [0003] In recent years, a composite preparation process reinforced by ceramic particles has appeared to improve the wear resistance of gray cast iron, such as placing vanadium carbide or titanium nitride particles on t...

Claims

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Application Information

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IPC IPC(8): C22C33/08B22D27/20
Inventor 许云华牛立斌岑启宏马幼平蔡安江阮晓光叶芳霞
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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