CN102825253A - Laser ignition and combustion extrusion synthesis method of Al-Ti-C powder metallurgy part - Google Patents
Laser ignition and combustion extrusion synthesis method of Al-Ti-C powder metallurgy part Download PDFInfo
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- CN102825253A CN102825253A CN2012103083331A CN201210308333A CN102825253A CN 102825253 A CN102825253 A CN 102825253A CN 2012103083331 A CN2012103083331 A CN 2012103083331A CN 201210308333 A CN201210308333 A CN 201210308333A CN 102825253 A CN102825253 A CN 102825253A
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Abstract
The invention discloses a laser ignition and combustion extrusion synthesis method of an Al-Ti-C powder metallurgy part. The Al-Ti-C powder metallurgy part indicates a camshaft bearing cover in an automobile engine. The method comprises the following steps of: pressing a part blank by using a pressing mold; then performing self-propagating high-temperature synthesis reaction by using laser ignition; and then performing hot press molding. The method belongs to the technical field of manufacturing of the powder metallurgy part. The conventional gravity casting molding and pressure casting molding are low in production efficiency and low in product qualification rate. According to the method, the self-propagating high-temperature synthesis reaction is performed through laser ignition of a reactant; the method is characterized in that the reactant is an Al-Ti-C composite material which is formed by mixing Al powder, Ti powder and C powder, wherein the composite material is placed in a mold cavity and is formed into a casting blank through pressure casting; the blank density reaches 80-85 percent of the design density; the blank is subjected to laser ignition and the self-propagating high-temperature synthesis reaction is performed; a casting is obtained after the reaction is finished and then extrusion is performed; and the density reaches the design density. According to the method, air pores in the casting are almost eliminated; and the method is used for manufacturing the Al-Ti-C powder metallurgy automobile engine camshaft bearing cover.
Description
Technical field
The present invention relates to a kind of laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts; Described Al-Ti-C powdered metal parts refers to the camshaft-bearing cap in the automobile engine; This method adopts compacting tool set compacted part blank; With laser ignition generation self propagating high temperature synthetic reaction, hot-forming subsequently then, belong to powdered metal parts manufacturing technology field.
Background technology
Car engine camshaft bearing cap is a kind of foundry goods 1, and is complex-shaped, and the recessed bridge shape that is of epirelief is seen shown in Figure 1.Its existing manufacturing approach has gravitational casting moulding and compression casting moulding.The gravitational casting forming method is characterized in that molten metal injects the method for casting mold die cavity under the self gravitation effect, and this method production efficiency is low, product percent of pass is low, and costs an arm and a leg, and is difficult to produce in enormous quantities.The compression casting forming method is called for short die cast, is under bigger pressure effect, makes liquid state or semi liquid state metal with in the higher speed filling die-casting die die cavity, and moulding under pressure with solidify the acquisition foundry goods.This method increases with respect to its production efficiency of gravitational casting forming method, and the product quality such as the porosity decrease.But still there is pore in the foundry goods that adopts die cast to obtain, becomes hidden danger of quality, and die cast is difficult for realizing for the indent intricate casting as the car engine camshaft bearing cap.In addition, said two kinds of methods all do not belong to hot extrusion molding.
Self propagating high temperature is synthetic, and also to be known as burning synthetic; It is characterized in that utilizing the chemical reaction heat that chemical reaction produced between the reactant to pass through from conduction from heating; Final synthetic material requested utilizes the effect of conduction certainly of substance reaction heat furtherly, makes chemical reaction diffusion between the material; In the extremely short time, produce high temperature, this synthesis mode is used to prepare high melting compound.
The laser ignition combustion is synthetic to be a kind of prior art, and this technology adopts laser to light the self propagating high temperature synthetic reaction, is used for making ceramic member.Laser is lighted continued irradiation reactant can remedy the heat of reaction loss that causes to the environment heat radiation in the reaction, can realize that through beam split multiple spot lights a fire simultaneously, and ignition energy density can be regulated easily, can long-rangely light a fire.Yet laser is lighted the manufacturing that combustion synthesis technology is not used for metal parts as yet.
Summary of the invention
The objective of the invention is to; Use laser and light combustion synthesis technology manufacturing Al-Ti-C powdered metal parts, when improving manufacturing efficient, eliminate the pore in the part; For this reason; We have invented a kind of laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts, and this method adopts laser to light the Al-Ti-C composite, produce pore-free Al-Ti-C powder metallurgy automobile engine camshaft bearing cap through the synthetic hot extrusion molding that reaches of self propagating high temperature.
The laser ignition combustion extruding synthetic method of the present invention's Al-Ti-C powdered metal parts is lighted reactant generation self propagating high temperature synthetic reaction through laser; It is characterized in that; The Al-Ti-C composite of reactant for forming by Al, Ti and C powder mixes; This composite is put into the casting mold die cavity and is cast into the foundry goods parison, and parison density reaches 80 ~ 85% of design density; Light concurrent being conigenous of this parison by laser and spread the high temperature synthetic reaction, reaction finishes to obtain to push behind the foundry goods again, and density reaches design density.
Its technique effect of the present invention is; Use laser and light combustion synthesis technology manufacturing Al-Ti-C powdered metal parts; Improved manufacturing efficient, the synthetic and subsequent hot extrusion molding through self propagating high temperature makes residual gas effusion in the foundry goods; Almost eliminate the pore in the foundry goods, round Realization goal of the invention.
Description of drawings
Fig. 1 is the schematic perspective view of car engine camshaft bearing cap shape.Fig. 2 is the present invention's method die casting and an extruding operating mode sketch map, and this figure is simultaneously as Figure of abstract.
The specific embodiment
The laser ignition combustion extruding synthetic method of the present invention's Al-Ti-C powdered metal parts is lighted reactant generation self propagating high temperature synthetic reaction through laser.The Al-Ti-C composite of reactant for being formed by Al, Ti and C powder mixes, the mixed proportion of Al powder, Ti powder, C powder is: Al powder 35wt.%, Ti powder and C powder be 65wt.% altogether, and the atomic ratio of C and Ti is 0.6.This composite is put into casting mold die cavity 2 and is cast into the foundry goods parison, and pressure is 60 ~ 80MPa, by upper trimming die 3, punch die 4 die casting simultaneously down, makes parison density reach 80 ~ 85% of design density.Withdraw from upper trimming die 3, laser optical shutter is opened, and the Al-Ti-C composite is lighted in laser irradiation on this parison, and laser power density is 40 ~ 60W/mm
2, the self propagating high temperature synthetic reaction takes place, chronic exposure 5 ~ 10 s, reaction finishes, and obtains foundry goods 1, again by upper trimming die 3, punch die 4 makes foundry goods 1 density reach design density simultaneously with the pressure extrusion of 80 ~ 90MPa down.
Claims (5)
1. the laser ignition combustion of an Al-Ti-C powdered metal parts pushes synthetic method; Light reactant generation self propagating high temperature synthetic reaction through laser; It is characterized in that; The Al-Ti-C composite of reactant for being formed by Al, Ti and C powder mixes put into this composite the casting mold die cavity and is cast into the foundry goods parison, and parison density reaches 80 ~ 85% of design density; Light concurrent being conigenous of this parison by laser and spread the high temperature synthetic reaction, reaction finishes to obtain to push behind the foundry goods again, and density reaches design density.
2. the laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts according to claim 1; It is characterized in that; The mixed proportion of said Al powder, Ti powder, C powder is: Al powder 35wt.%, Ti powder and C powder be 65wt.% altogether, and the atomic ratio of C and Ti is 0.6.
3. the laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts according to claim 1 is characterized in that the die casting pressure of foundry goods parison is 60 ~ 80MPa, by upper trimming die (3), punch die (4) die casting simultaneously down.
4. the laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts according to claim 1; It is characterized in that; Behind the die casting foundry goods parison, withdraw from upper trimming die (3), laser optical shutter is opened; The Al-Ti-C composite is lighted in laser irradiation on said parison, laser power density is 40 ~ 60W/mm
2, chronic exposure 5 ~ 10 s.
5. the laser ignition combustion extruding synthetic method of Al-Ti-C powdered metal parts according to claim 1; It is characterized in that; The self propagating high temperature synthetic reaction finishes the back and obtains foundry goods (1), again by upper trimming die (3), punch die (4) is simultaneously with the pressure extrusion foundry goods (1) of 80 ~ 90MPa down.
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| CN2012103083331A CN102825253A (en) | 2012-08-27 | 2012-08-27 | Laser ignition and combustion extrusion synthesis method of Al-Ti-C powder metallurgy part |
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| CN2012103083331A CN102825253A (en) | 2012-08-27 | 2012-08-27 | Laser ignition and combustion extrusion synthesis method of Al-Ti-C powder metallurgy part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900340A (en) * | 2017-12-14 | 2018-04-13 | 东莞理工学院 | A kind of method and its heap-type mould using metal dust processing boss |
| CN110791671A (en) * | 2019-11-12 | 2020-02-14 | 成都银河动力有限公司 | Al-Ti-C-SiC composite material and preparation method thereof |
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| EP0852978A1 (en) * | 1995-09-27 | 1998-07-15 | The Ishizuka Research Institute, Ltd. | Super-abrasive grain-containing composite material |
| US5826160A (en) * | 1995-08-14 | 1998-10-20 | The United States Of America As Represented By The Secretary Of The Army | Hot explosive consolidation of refractory metal and alloys |
| CN1605413A (en) * | 2004-10-20 | 2005-04-13 | 华南理工大学 | Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature |
| CN1824815A (en) * | 2006-02-08 | 2006-08-30 | 哈尔滨工业大学 | Self-spreading quasi-thermo-isostatic pressing method for preparing large size high-pure Ti3A1C2 |
| CN101186295A (en) * | 2007-12-12 | 2008-05-28 | 哈尔滨工业大学 | Method of preparing high purity Ti2AlC block material |
| CN101302107A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof |
| CN101786166A (en) * | 2010-02-01 | 2010-07-28 | 四川大学 | Method for in-situ preparation of Fe-Cu-based composite material in electric field based on powder metallurgy |
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2012
- 2012-08-27 CN CN2012103083331A patent/CN102825253A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5826160A (en) * | 1995-08-14 | 1998-10-20 | The United States Of America As Represented By The Secretary Of The Army | Hot explosive consolidation of refractory metal and alloys |
| EP0852978A1 (en) * | 1995-09-27 | 1998-07-15 | The Ishizuka Research Institute, Ltd. | Super-abrasive grain-containing composite material |
| CN1605413A (en) * | 2004-10-20 | 2005-04-13 | 华南理工大学 | Method for synthesizing TiNi-TiN gradient material by laser-induction self-spreading under high temperature |
| CN1824815A (en) * | 2006-02-08 | 2006-08-30 | 哈尔滨工业大学 | Self-spreading quasi-thermo-isostatic pressing method for preparing large size high-pure Ti3A1C2 |
| CN101186295A (en) * | 2007-12-12 | 2008-05-28 | 哈尔滨工业大学 | Method of preparing high purity Ti2AlC block material |
| CN101302107A (en) * | 2008-05-28 | 2008-11-12 | 哈尔滨工业大学 | Pressure auxiliary self-spreading titanium aluminum carbon block material and preparation thereof |
| CN101786166A (en) * | 2010-02-01 | 2010-07-28 | 四川大学 | Method for in-situ preparation of Fe-Cu-based composite material in electric field based on powder metallurgy |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900340A (en) * | 2017-12-14 | 2018-04-13 | 东莞理工学院 | A kind of method and its heap-type mould using metal dust processing boss |
| CN110791671A (en) * | 2019-11-12 | 2020-02-14 | 成都银河动力有限公司 | Al-Ti-C-SiC composite material and preparation method thereof |
| CN110791671B (en) * | 2019-11-12 | 2021-06-01 | 成都银河动力有限公司 | Al-Ti-C-SiC composite material and preparation method thereof |
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Application publication date: 20121219 |