CN100358657C - Pressure casting mould and its preparing method - Google Patents
Pressure casting mould and its preparing method Download PDFInfo
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- CN100358657C CN100358657C CNB2005100199603A CN200510019960A CN100358657C CN 100358657 C CN100358657 C CN 100358657C CN B2005100199603 A CNB2005100199603 A CN B2005100199603A CN 200510019960 A CN200510019960 A CN 200510019960A CN 100358657 C CN100358657 C CN 100358657C
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Abstract
The present invention relates to a pressure casting mould and a preparing method thereof. The pressure casting mould is characterized in that the pressure casting mould is mainly composed of a basal body part (1), a transition layer part (2) and a surface coating (3) of a mould chamber, wherein the volume of the basal body part (1) occupies 90% to 95%, and the basal body part (1) is made of 5CrNiMo steel or 5CrMnMo steel of an ordinary pressure casting mould; the transition layer part (2) is positioned between the basal body part (1) and the surface coating (3) of a mould chamber; the transition layer part is divided into two to six layers; steel material of each transition layer is selected according to a step change from low temperature to high temperature from the basal body part to the surface of a mould chamber; the material of the surface coating (3) of a mould chamber is WC or TiC; both of the materials of each layer of the transition layer part (2) and the surface coating (3) of a mould chamber are homogeneous materials. The pressure casting mould made by the preparing method of the present invention has advantage of long service life.
Description
Technical field
The present invention relates to a kind of compression mod and preparation method thereof, particularly relate to kind black or non-ferrous casting and produce used compression mod and preparation method thereof.
Background technology
The condition of work of compression mod is very abominable, and it bears high temperature, high pressure and cyclical heat one mechanical load, requires the compression mod material to have the fatigue behaviour of good high-temperature intensity, high temperature toughness, high temperature abrasion resistance and anti-cyclical heat load and mechanical load.Existing compression mod is made up of compression mod steel and impression surface coating, and used various compression mod steel all can not satisfy the service behaviour requirement of compression mod fully both at home and abroad.Especially strong performance indications during high temperature and toughness, fatigue durability index are two aspects of a pair of contradiction, are difficult to get both.Though adopt different heat treatment and surface Hardening Treatment, can local be in harmonious proportion the antagonism of two sides.But still can not satisfy compression mod work performance demands fully.The particularly die casting of ferrous metal is because the restriction of mold materials can not generally be applied.Existing compression mod is low service life, seriously restricts the raising of the technical merit and the economic benefit of compression mod.
Summary of the invention
The object of the present invention is to provide compression mod of a kind of high life and preparation method thereof.
To achieve these goals, technical scheme of the present invention is: a kind of compression mod, it is characterized in that: it is made up of body portion 1, transition zone part 2 and impression surface coating 3, and the volume of body portion 1 accounts for 90-95%, and body portion 1 adopts common compression mod 5CrNiMo steel or 5CrMnMo steel; Transition zone part 2 is between body portion 1 and impression surface coating 3, and transition zone partly is divided into the 2-6 layer, according to the steel material of being selected for use each transition zone from body portion to the impression surface by low temperature to the high temperature stepped change; The material of impression surface coating 3 is WC or TiC; The material of each layer of body portion 1, transition zone part 2 and impression surface coating 3 all is homogeneous materials separately.
The steel material of each transition zone of described transition zone part 2 is that 3Cr2W8V, W18Cr4V, H are steel material (as H13, H19, H21), 6W5Cr4V2 steel or steel bonded carbide etc.
Described transition zone part 2 is divided into 4 layers, and the material of first transition zone is H13, and the material of second transition zone is H19, and the material of the 3rd transition zone is 6W5Cr4V2, and the material of the 4th transition zone is a steel bonded carbide.
A kind of preparation method of compression mod is characterized in that comprising the steps:
The first step according to concrete foundry goods, is designed compression mod technology and die drawing by prior art;
Second step, according to the design result of the first step, the casting forming process is carried out simulation analysis with the finite element professional software, determine the compression mod equilibrium temperature according to the thermal balance of compression mod; With finite element software simulation analysis is carried out in temperature field, mechanical stress fields, stress field and the combined stress field of compression mod; Thermoisopleth in the temperature field is pressed 50-100 ℃ of division;
The 3rd step spatially was divided into body portion, transition zone part and impression surface coating with compression mod, and the volume of body portion accounts for 90-95%, with the thermoisopleth in the temperature field transition zone partly is divided into the 2-6 layer; And make the engineering drawing of compression mod body portion respectively, the engineering drawing during transition zone of body portion stack, the engineering drawing during two transition zones of body portion stack ..., the engineering drawing when body portion superposes all transition zones;
The 4th goes on foot, and determine the material of body portion, transition zone part and impression surface coating: body portion adopts common compression mod 5CrNiMo steel or 5CrMnMo steel; The transition zone part is according to the temperature change amplitude of each layer, the actual temp interval, the size of temperature stress and mechanical stress, determine the elastic modelling quantity that layers of material should possess, coefficient of thermal expansion, heat transfer coefficient, thermal capacity, parameters such as yield stress, (each steel material all has the temperature operation interval that adapts to most according to selecting the steel material of the relevant temperature operation interval of each transition zone to the impression surface for use by low temperature to high temperature stepped change from body portion, corresponding steel material is selected in operating temperature interval according to transition zone each layer partly for use, and the temperature operation interval that adapts to most as H19 is 450-550 ℃); The material of described impression surface coating is WC or TiC; Each layer of body portion, transition zone part and the material of impression surface coating all are homogeneous materials separately;
The 5th step is with conventional method processing and fabricating compression mod body portion;
The 6th step, each transition zone that on the compression mod body portion, successively superposes, stacking method is a welding method, all should meet the shape and size of corresponding engineering drawing behind every stack one deck, gets the compression mod blank;
In the 7th step, the type rooved face roughness of compression mod blank is handled, till reaching roughness and requiring;
The 8th step, the compression mod blank after the roughness processing is carried out the impression surface coating handle, carry out whole synthesis heat treatment simultaneously, get product.
The hierarchy number of the transition zone part in described the 3rd step is determined that by the difference between impression surface maximum operating temperature and body portion operating temperature the temperature difference is big more between impression surface maximum operating temperature and body portion operating temperature, and hierarchy number is many more.
The steel material of each transition zone of the transition zone part in described the 4th step is that 3Cr2W8V, W18Cr4V, H are steel material (as H13, H19, H21), 6W5Cr4V2 steel or steel bonded carbide etc.
The present invention adopts compression mod to be made up of body portion 1, transition zone part 2 and impression surface coating 3, the range of temperature that each layer material is born significantly reduces (ordinary circumstance is which floor compression mod is divided into, range of temperature just reduces to part), thereby the thermal stress peak value of each layer material also just reduces significantly.Die casting has the FGM performance, satisfies the harsh requirement of various harsh conditions of work to compression mod work performance fully, and compression mod is significantly improved service life.
The present invention at first carries out simulation analysis with existing finite element professional software to the course of work of concrete compression mod, finds the solution distribution situation and the Changing Pattern and the influence factor of its temperature field, mechanical stress fields, stress field; Secondly the root pick goes out suitable compression mod FGM composition to the simulation analysis consequence devised of compression mod; The die casting that produces at last has the FGM performance, satisfies the harsh requirement of various harsh conditions of work to compression mod work performance fully, and compression mod is significantly improved service life.The simulation analysis that the finite element professional software carries out the course of work of concrete compression mod shows, compression mod thermal stress peak value in the course of the work is 8-10 with the ratio of mechanical stress peak value, causing the main cause of compression mod damage is thermal stress, and the damage that mechanical stress causes is very little.The size of thermal stress is determined by range of temperature.Because the present invention is divided into 4-8 layer (each layer, the impression surface coating that contain body portion, transition zone part) with compression mod in material preparation, the range of temperature that each layer material is born significantly reduces (ordinary circumstance is which floor compression mod is divided into, range of temperature just reduces to part), thereby the thermal stress peak value of each layer material also just reduces significantly.Guarantee on layers of material selected that in addition layers of material all can be in elastic stage completely under the effect of in the course of the work thermal stress peak value and mechanical stress peak value.The significantly reduction of thermal stress and the selection of layers of material are suitable, and it is inevitable increasing substantially service life.With the compression mod that method of the present invention is made, its cost of manufacture and prior art are suitable, but have significantly (ten times or more) to improve than existing compression mod its service life.
Description of drawings
Fig. 1 is the structural representation of compression mod of the present invention
Among the figure: 1-body portion, 2-transition zone part, 3-impression surface coating.
The specific embodiment
As shown in Figure 1, a kind of compression mod, it mainly is made up of body portion 1, transition zone part 2 and impression surface coating 3, and the volume of body portion 1 accounts for 90-95%, and body portion 1 adopts common compression mod 5CrNiMo steel or 5CrMnMo steel; Transition zone part 2 is between body portion 1 and impression surface coating 3, transition zone part 2 is divided into 4 layers, and the material of first transition zone is H13, and the material of second transition zone is H19, the material of the 3rd transition zone is 6W5Cr4V2, and the material of the 4th transition zone is a steel bonded carbide; The material of impression surface coating 3 is WC or TiC; The material of body portion 1, transition zone part 2 and impression surface coating 3 all is homogeneous materials separately.
The preparation method of above-mentioned a kind of compression mod comprises the steps:
1, a diameter is 100mm, highly is 160mm, and material is the die casting of 45 steel; Design extrusion process and die casting figure by prior art.
2, according to designed extrusion process and die drawing, with the finite element professional software casting forming process is carried out simulation analysis, determine die casting work rhythm and compression mod equilibrium temperature according to the thermal balance of compression mod; According to die casting work rhythm and compression mod equilibrium temperature, simulation analysis is carried out in temperature field, mechanical stress fields, stress field and the combined stress field of compression mod again with another finite element software; Thermoisopleth in the temperature field is by 100 ℃ of divisions.
3, according to temperature field and combined stress field compression mod spatially is divided into body portion, transition zone part and impression surface coating (as shown in Figure 1), the volume of body portion accounts for 90-95%, and transition zone is partly carried out layering.The preheat temperature of compression mod is generally 150-350 ℃, the operating temperature of body portion is not less than the preheat temperature of compression mod, determine the operating temperature of body portion according to the equilibrium temperature of compression mod, the sunykatuib analysis result is that the operating temperature of body portion is 350 ℃, impression surface maximum operating temperature is 1050 ℃, and both differ 700 ℃.With the thermoisopleth in the temperature field transition portion is divided into 4 layers.And the engineering drawing 5 the when engineering drawing 4 the when engineering drawing 3 the when engineering drawing 2 when making engineering drawing 1, engineering drawing 1 first transition zone of stack of compression mod body portion respectively, second transition zone of engineering drawing 2 stacks, the 3rd transition zone of engineering drawing 3 stacks, the 4th transition zone of engineering drawing 4 stacks.
4, according to the layering result, the material of selecting body portion for use is 5CrMnMo, the material of first transition zone is H13 (the temperature operation interval that adapts to most is 350-450 ℃), the material of second transition zone is H19 (the temperature operation interval that adapts to most is 450-550 ℃), the material of the 3rd transition zone is 6W5Cr4V2 (the temperature operation interval that adapts to most is 550-650 ℃), the material of the 4th transition zone is steel bonded carbide (the temperature operation interval that adapts to most is 650-750 ℃), and the impression surface coating is WC.The material of matrix material and each transition zone all is homogeneous materials separately.
5, after material is determined, with conventional method processing and fabricating compression mod body portion.
6, each transition zone that on the compression mod matrix, successively superposes again, stacking method is a welding method, all should meet the shape and size of corresponding engineering drawing behind every stack one deck, the compression mod blank.
7, then, the type rooved face of compression mod blank is carried out sanding and polishing, its roughness is met the requirements till.
8, last, the compression mod blank after the roughness processing is carried out the impression surface coating handle, carry out whole synthesis heat treatment simultaneously, get product, can come into operation.
The analog result of the die casting course of work that the compression mod that the present invention obtains carries out, compression mod each several part all are in elastic stage completely in the course of the work, reach more than 80000 disposable service life, than exceeding more than 10 times 6000 of original service lifes.
Claims (6)
1. compression mod is characterized in that: it is made up of body portion (1), transition zone part (2) and impression surface coating (3), and the volume of body portion (1) accounts for 90-95%, compression mod 5CrNiMo steel or 5CrMnMo steel that body portion (1) employing is common; Transition zone part (2) is positioned between body portion (1) and the impression surface coating (3), and transition zone partly is divided into the 2-6 layer, according to the steel material of being selected for use each transition zone from body portion to the impression surface by low temperature to the high temperature stepped change; The material of impression surface coating (3) is WC or TiC; Each layer of body portion (1), transition zone part (2) and the material of impression surface coating (3) all are homogeneous materials separately.
2. a kind of compression mod according to claim 1 is characterized in that: the steel material of each transition zone of described transition zone part (2) is 3Cr2W8V, W18Cr4V, H13, H19, H21,6W5Cr4V2 steel or steel bonded carbide.
3. a kind of compression mod according to claim 1, it is characterized in that: described transition zone part (2) is divided into 4 layers, and the material of first transition zone is H13, and the material of second transition zone is H19, the material of the 3rd transition zone is 6W5Cr4V2, and the material of the 4th transition zone is a steel bonded carbide.
4. the preparation method of a kind of compression mod as claimed in claim 1 is characterized in that comprising the steps:
The first step according to concrete foundry goods, is designed compression mod technology and die drawing by prior art;
Second step, according to the design result of the first step, the casting forming process is carried out simulation analysis with the finite element professional software, determine the compression mod equilibrium temperature according to the thermal balance of compression mod; With finite element software simulation analysis is carried out in temperature field, mechanical stress fields, stress field and the combined stress field of compression mod;
The 3rd step spatially was divided into body portion, transition zone part and impression surface coating with compression mod, and the volume of body portion accounts for 90-95%, with the thermoisopleth in the temperature field transition zone partly is divided into the 2-6 layer; And make the engineering drawing of compression mod body portion respectively, the engineering drawing during transition zone of body portion stack, the engineering drawing during two transition zones of body portion stack ..., the engineering drawing when body portion superposes all transition zones;
The 4th goes on foot, and determine the material of body portion, transition zone part and impression surface coating: body portion adopts common compression mod 5CrNiMo steel or 5CrMnMo steel; The transition zone part is according to the size of temperature change amplitude, actual temp interval, temperature stress and the mechanical stress of each layer, determine elastic modelling quantity, coefficient of thermal expansion, heat transfer coefficient, thermal capacity, yield stress parameter that layers of material should possess, according to the steel material of selecting the relevant temperature operation interval of each transition zone from body portion to the impression surface by low temperature to high temperature stepped change for use; The material of described impression surface coating is WC or TiC; Each layer of body portion, transition zone part and the material of impression surface coating all are homogeneous materials separately;
The 5th step is with conventional method processing and fabricating compression mod body portion;
The 6th step, each transition zone that on the compression mod body portion, successively superposes, stacking method is a welding method, all should meet the shape and size of corresponding engineering drawing behind every stack one deck, gets the compression mod blank;
The 7th step is to the type rooved face sanding and polishing of compression mod blank, till reaching roughness and requiring;
The 8th step, the compression mod blank after the roughness processing is carried out the impression surface coating handle, carry out whole synthesis heat treatment simultaneously, get product.
5. the preparation method of a kind of compression mod according to claim 4, it is characterized in that: the hierarchy number of the transition zone part in described the 3rd step is determined by the difference between impression surface maximum operating temperature and body portion operating temperature, the temperature difference is big more between impression surface maximum operating temperature and body portion operating temperature, and hierarchy number is many more.
6. the preparation method of a kind of compression mod according to claim 4 is characterized in that: the steel material of each transition zone of the transition zone part in described the 4th step is 3Cr2W8V, W18Cr4V, H13, H19, H21,6W5Cr4V2 steel or steel bonded carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100199603A CN100358657C (en) | 2005-12-06 | 2005-12-06 | Pressure casting mould and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100199603A CN100358657C (en) | 2005-12-06 | 2005-12-06 | Pressure casting mould and its preparing method |
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| Publication Number | Publication Date |
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| CN1775418A CN1775418A (en) | 2006-05-24 |
| CN100358657C true CN100358657C (en) | 2008-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100199603A Expired - Fee Related CN100358657C (en) | 2005-12-06 | 2005-12-06 | Pressure casting mould and its preparing method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104942262B (en) * | 2015-07-10 | 2017-05-03 | 武汉科技大学 | Functional gradient die-casting die and manufacturing process thereof |
| CN105345917A (en) * | 2015-11-09 | 2016-02-24 | 无锡市锡山区仁景模具厂 | Durable road edge stone mold |
| CN105522135A (en) * | 2016-01-14 | 2016-04-27 | 瑞安市三义机械有限公司 | Die-casting mold for stainless steel valve body |
| CN109766634B (en) * | 2019-01-11 | 2023-04-18 | 徐州徐工矿业机械有限公司 | Mining large-scale steel casting digital forward research and development method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741870A (en) * | 1980-08-26 | 1982-03-09 | Toshiba Mach Co Ltd | Surface treatment of die for die casting |
| JP2004167505A (en) * | 2002-11-18 | 2004-06-17 | Toshiba Mach Co Ltd | Member for die casting machine, and method for manufacturing the same |
-
2005
- 2005-12-06 CN CNB2005100199603A patent/CN100358657C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5741870A (en) * | 1980-08-26 | 1982-03-09 | Toshiba Mach Co Ltd | Surface treatment of die for die casting |
| JP2004167505A (en) * | 2002-11-18 | 2004-06-17 | Toshiba Mach Co Ltd | Member for die casting machine, and method for manufacturing the same |
Non-Patent Citations (4)
| Title |
|---|
| 3Cr2W8V钢和H13钢的硬度对加工性能及压铸模寿命的影响. 田光辉等.模具材料及热处理技术，第2期. 2004 * |
| 压铸模具钢的选择与提高压铸模寿命的途径. 胡心平等.特种铸造及有色合金，第4期. 2003 * |
| 如何提高黑色金属压铸模寿命. 刘先兰.模具制造，第11期. 2002 * |
| 提高压铸模使用寿命的方法探讨. 杨大伟.机械制造，第2期. 1998 * |
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Granted publication date: 20080102 Termination date: 20100106 |