CN101406945A - Method for preparing gray iron-base composite material for in situ production of tungsten carbide - Google Patents
Method for preparing gray iron-base composite material for in situ production of tungsten carbide Download PDFInfo
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- CN101406945A CN101406945A CNA2008102323149A CN200810232314A CN101406945A CN 101406945 A CN101406945 A CN 101406945A CN A2008102323149 A CNA2008102323149 A CN A2008102323149A CN 200810232314 A CN200810232314 A CN 200810232314A CN 101406945 A CN101406945 A CN 101406945A
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- gray iron
- tungsten
- composite material
- tungsten carbide
- silk screen
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Abstract
The invention discloses a method for preparing a gray iron based composite material for generating tungsten carbide in situ. The method comprises the following steps: weaving tungsten wires into a tungsten wire net with certain specification, and cutting, coiling or overlapping the tungsten wire net to form a fixed structure which is preset in a die cavity of a casting mould; and smelting the gray iron to obtain molten gray iron to be poured into a casting mould, and cooling and cleaning the casting mould to obtain the gray iron based composite material for generating the tungsten carbide in situ. The gray iron based composite material for generating the tungsten carbide in situ prepared by the method can obtain evenly-distributed tungsten carbide hard phases at the position of the tungsten wire net through the reaction in situ of the tungsten in the tungsten wire net and the carbon in the gray iron. The gray iron based composite material fully plays the high wear resistance of the tungsten carbide hard phases and the good toughness of the gray iron, the hard phases are arranged orderly and are distributed evenly, the regulation and the control are convenient, and the process is reliable, thus the gray iron based composite material can be widely used in the wear resisting fields such as mine, electric power, metallurgy, coal, building materials and the like for producing wear resistant parts with various shapes and any size specification.
Description
Technical field
The invention belongs to the metal-base composites technical field, particularly a kind of original position generates the method for preparing gray iron-base composite material of tungsten carbide.
Background technology
The gray iron low price is most widely used a kind of cast iron, generally is used to make parts such as support, gear-box, valve body, bearing block.But owing to lack hard phase such as carbide in the gray iron, its macrohardness is very low, so gray iron can not resist under the wear working condition condition, abrasive material is to the cutting abrasion effect of piece surface, this makes gray iron be difficult to be applied on the equipment part that is subjected to abrasive wear, has greatly limited its scope of application.
The compound preparation technology who has occurred the ceramic particle enhancing in recent years is to improve the wearability of gray iron, for example be placed on the casting mold bottom with tungsten carbide or titanium nitride particles, and then pour into gray iron, but preparation technology is difficult to stable control, it is inhomogeneous to strengthen distribution of particles, still is difficult to obtain to strengthen the whole wear-resistant gray iron that body is evenly distributed.Also have hard particles such as tungsten carbide are shaped with adhesive cures, put into casting mold, then casting of molten metal, make the fusion of interpenetrating of hard particles and molten metal, but produce a large amount of gases because binding agent at high temperature decomposes, cause the many pores of the inner formation of composite bed, effect is undesirable.
Summary of the invention
The objective of the invention is to, provide a kind of original position to generate the method for preparing gray iron-base composite material of tungsten carbide, the gray iron-base composite material that the original position of this method preparation generates tungsten carbide is to form netted tungsten carbide hard phase in the gray iron matrix, and effectively be combined as a whole with gray iron, give full play to the high abrasion characteristic of hard phase, also kept the excellent toughness of parent metal, thereby reached best Performance Match, can be made into the product of multiple planform, development prospect is wide.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of original position generates the method for preparing gray iron-base composite material of tungsten carbide, it is characterized in that, may further comprise the steps:
Step 1 at first weaves tungsten silk screen with tungsten filament;
Step 2 with the tungsten silk screen cutting of braiding, roll or superpose, is prefabricated into a fixed structure;
Step 3 is preset at prefabricated tungsten silk screen in the die cavity of casting mold;
Step 4 pours into the liquid gray iron of smelting in the casting mold to liquid gray iron by casting method, makes liquid gray iron bury tungsten silk screen fully;
Step 5, casting mold can obtain the gray iron-base composite material that original position generates tungsten carbide after cooling, off-type cleaning.
Adopt the gray iron-base composite material of the original position generation tungsten carbide of method preparation of the present invention, can by tungsten in the tungsten silk screen and the carbon generation reaction in-situ in the gray iron, obtain the tungsten carbide hard phase that is evenly distributed in the position of tungsten silk screen.This material has been given full play to the high-wear resistance of tungsten carbide hard phase and the excellent toughness of gray iron, and hard is arranged in order mutually, is evenly distributed, and regulation and control are convenient, and technology is reliable, can be widely used in wear-resisting fields such as mine, electric power, metallurgy, coal, building materials.Can produce the wear part of different shape, any size specification.
Description of drawings
Fig. 1 is a flow chart of the present invention;
Fig. 2 is a blanking liner plate sectional view;
The embodiment that provides below in conjunction with accompanying drawing and inventor is described in further detail the present invention.
The specific embodiment
Method for preparing gray iron-base composite material according to original position generation tungsten carbide of the present invention may further comprise the steps:
Step 1 at first weaves tungsten silk screen with tungsten filament;
Step 2 with the tungsten silk screen cutting of braiding, roll or superpose, is prefabricated into a fixed structure;
Step 3 is preset at prefabricated tungsten silk screen in the die cavity of casting mold;
Step 4 pours into the liquid gray iron of smelting in the casting mold to liquid gray iron by casting method, makes liquid gray iron bury tungsten silk screen fully;
Step 5, casting mold can obtain the gray iron-base composite material that original position generates tungsten carbide after cooling, off-type cleaning.
Above-mentioned tungsten filament diameter is 0.1～2.5mm.
Above-mentioned tungsten silk screen is woven into single or multiple lift, and the tungsten filament spacing is 0.2～10mm, also can suitably adjust the tungsten filament spacing according to the operating mode needs.
Below be the embodiment that the inventor provides, need to prove, the invention is not restricted to following examples.
Embodiment 1: make composite blanking liner plate
Present embodiment carries out according to following step:
(1) with tungsten filament braiding tungsten silk screen 1, the tungsten filament diameter is 1mm, and tungsten silk screen is woven into individual layer, and the tungsten filament spacing is 5mm;
(2) tungsten silk screen 1 is cut into rectangle by blanking liner plate length and width specification;
(3) tungsten silk screen 1 that cuts is placed into waterglass sand mold bottom, the placement thickness of tungsten silk screen is 1/2nd of blanking liner plate gross thickness;
(4) smelt gray iron 2, obtain liquid gray iron;
(5) adopt gravity casting method that liquid gray iron 2 is poured into casting mold, after the off-type cleaning, can obtain the wear-resisting blanking liner plate of gray iron-base composite material.
Embodiment 2:
Different is for present embodiment and embodiment 1, and the tungsten filament diameter is 0.1mm, and tungsten silk screen is woven into multilayer, and the tungsten filament spacing is 0.2mm; All the other are with embodiment 1.
Embodiment 3:
Different is for present embodiment and embodiment 1, and the tungsten filament diameter is 2.5mm, and tungsten silk screen is woven into multilayer, the tungsten filament spacing be 10mm all the other with embodiment 1.
Certainly, according to the requirement and the work condition environment of workpiece, both can be positioned over tungsten silk screen the part of casting mold, and obtain local wear-resisting part behind the cast gray iron, composite bed thickness can be adjusted arbitrarily according to working condition requirement; Also can be positioned over tungsten silk screen in the whole casting mold die cavity, obtain whole wear-resisting part behind the cast gray iron, process controllability is strong.
The gray iron-base composite material mechanism that adopts method of the present invention to prepare original position generation tungsten carbide is, reaction in-situ at high temperature takes place in W elements and the carbon in the gray iron in the netted tungsten filament, naturally generate tungsten carbide hard phase, be integral with the gray iron matrix bond, the composite that obtains had both kept the excellent toughness of gray iron, and the high-wearing feature of tungsten carbide hard phase has been arranged again.Tungsten silk screen is arranged in order, and the tungsten carbide hard that the reaction back is generated is uniformly distributed in the gray iron mutually, has solved in the particles reiforced metal-base composition preparation, strengthens a body difficult problem pockety.Its method controllability is strong, simple to operation, the yield rate height.
Claims (3)
1, a kind of original position generates the method for preparing gray iron-base composite material of tungsten carbide, it is characterized in that, may further comprise the steps:
Step 1 at first weaves tungsten silk screen with tungsten filament;
Step 2 with the tungsten silk screen cutting of braiding, roll or superpose, is prefabricated into a fixed structure;
Step 3 is preset at prefabricated tungsten silk screen in the die cavity of casting mold;
Step 4 pours into the liquid gray iron of smelting in the casting mold to liquid gray iron by casting method, makes liquid gray iron bury tungsten silk screen fully;
Step 5, casting mold can obtain the gray iron-base composite material that original position generates tungsten carbide after cooling, off-type cleaning.
2, the method for claim 1 is characterized in that, described tungsten filament diameter is 0.1mm～2.5mm.
3, the method for claim 1 is characterized in that, described tungsten silk screen is woven into single or multiple lift, and the tungsten filament spacing is 0.2～10mm, perhaps suitably adjusts the tungsten filament spacing according to the operating mode needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102323149A CN101406945A (en) | 2008-11-18 | 2008-11-18 | Method for preparing gray iron-base composite material for in situ production of tungsten carbide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102323149A CN101406945A (en) | 2008-11-18 | 2008-11-18 | Method for preparing gray iron-base composite material for in situ production of tungsten carbide |
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| CN101406945A true CN101406945A (en) | 2009-04-15 |
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| CNA2008102323149A Pending CN101406945A (en) | 2008-11-18 | 2008-11-18 | Method for preparing gray iron-base composite material for in situ production of tungsten carbide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350491A (en) * | 2011-10-26 | 2012-02-15 | 西安建筑科技大学 | Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar |
| CN102794451A (en) * | 2012-09-15 | 2012-11-28 | 西安瑞福莱钨钼有限公司 | Preparation method of anti-bending molybdenum/tungsten compound sheet material |
| CN104525913A (en) * | 2014-11-18 | 2015-04-22 | 西安理工大学 | Guardrails and a manufacturing method thereof |
| CN104785756A (en) * | 2015-05-07 | 2015-07-22 | 李果 | Casting technology allowing partial hardness to be controllable |
-
2008
- 2008-11-18 CN CNA2008102323149A patent/CN101406945A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350491A (en) * | 2011-10-26 | 2012-02-15 | 西安建筑科技大学 | Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar |
| CN102350491B (en) * | 2011-10-26 | 2013-06-26 | 西安建筑科技大学 | Preparation method of tungsten carbide particle enhanced steel-base surface layer composite bar |
| CN102794451A (en) * | 2012-09-15 | 2012-11-28 | 西安瑞福莱钨钼有限公司 | Preparation method of anti-bending molybdenum/tungsten compound sheet material |
| CN104525913A (en) * | 2014-11-18 | 2015-04-22 | 西安理工大学 | Guardrails and a manufacturing method thereof |
| CN104785756A (en) * | 2015-05-07 | 2015-07-22 | 李果 | Casting technology allowing partial hardness to be controllable |
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Open date: 20090415 |