CN114472775A - Titanium alloy die forging mould - Google Patents
Titanium alloy die forging mould Download PDFInfo
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- CN114472775A CN114472775A CN202210116235.1A CN202210116235A CN114472775A CN 114472775 A CN114472775 A CN 114472775A CN 202210116235 A CN202210116235 A CN 202210116235A CN 114472775 A CN114472775 A CN 114472775A
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- die
- titanium alloy
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- unit body
- die forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention discloses a titanium alloy die forging die which comprises die steel and die forging materials, wherein the die forging materials are positioned on the upper surface of the die steel, the die forging materials are arranged according to the form of unit bodies, and the unit bodies comprise I-type unit bodies, II-type unit bodies and III-type unit bodies. The invention has the advantages of lower cost, improved strength and prolonged service life.
Description
Technical Field
The invention belongs to the technical field of metal materials, and particularly relates to a titanium alloy die forging die.
Background
Titanium is an important structural metal developed in the 50 s of the 20 th century, and titanium alloy has high strength, good corrosion resistance and high heat resistance. In the 50-60 s of the 20 th century, high-temperature titanium alloy for aircraft engines and structural titanium alloy for engine bodies were mainly developed. At present, the core components of military and some civil products are also made of titanium alloys.
At present, the main forming mode of titanium alloy parts is die forging forming, different temperatures are adopted for forging according to different sizes, the obtained forged piece is smooth in surface and accurate in size, and compared with other processing modes, the processing cost is low, and the steps are simple. Different forging methods and forging conditions can enable the forging piece to obtain different structural states and mechanical properties, the structural states and the temperature conditions have direct influence on the deformation behavior of the titanium alloy, and different processing modes can be adopted according to the required properties.
The conventional forging defects of the titanium alloy mainly comprise tissue overheating, uneven tissue, cavities, cracks and the like, are easy to find in the microscopic structure inspection or ultrasonic detection of the titanium alloy product, and are mainly formed by improper control of process parameters in the forging process of the titanium alloy product, so that the proper deformation rate, heating and forging temperature, pass deformation and cooling speed after forging are selected according to the titanium alloy materials with different characteristics in the forging process.
In the process of titanium alloys, the die is required to withstand significant impact pressures. The surface of the die cavity has complex shape and different depth, so that the stress on the surface of each die cavity is uneven. When the hot metal enters the cavity, the surface of the cavity is rapidly heated, namely tempering treatment is carried out, and the flowing blank generates scouring, extrusion and friction on the cavity, so that the die is softened and the abrasion is aggravated. In particular, titanium alloys have good ductility and are formed in a mold, and the titanium alloys often have a sticking effect similar to that of "chewing gum" on the mold surface. In the process, the surface roughness of the die is damaged, so that the forging is deviated, and the surface of the die is grooved. In addition, the die is subjected to cyclic thermal stress and abrasion in the repeated forging process, so that the die is subjected to plastic deformation such as thermal cracking, collapse and the like. The defects reduce the quality of the die, reduce the service life of the die, cause the die to lose efficacy and be scrapped, and cause great resource waste.
Since titanium alloys are very expensive and have very poor machinability, the die-formed titanium alloy parts are not machined and are die-formed in one step. The method puts a very high use requirement on the die, so that the use cost of the die is greatly increased, the die forging die for producing the common forge piece for 1000 die times can be used for producing the titanium alloy part for about 100 times, and the surface of the titanium alloy part is slightly damaged and judged to be invalid. If a method can be used for the titanium alloy die forging die, the viscous and corrosive wear effect of the titanium alloy die forging die on the surface of the die is reduced, the performance and the service life of the titanium alloy die forging die can be greatly improved by pretreatment, and a large amount of resources and production cost are saved. The natural observation shows that the soil animals such as the mole cricket, the dung beetle, the pangolin, the hippophae rhamnoides and the like can penetrate through the soil for a long time, and the body surface is not damaged. It has been found that non-smooth morphology exists on body surfaces that are subject to more compression and abrasion. Therefore, a coupling bionic non-smooth model is processed on the working surface of the die by adopting a laser fusing method to deal with fatigue and abrasion generated in the production process.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above and/or other problems occurring in the prior art.
Therefore, the invention aims to overcome the defects in the prior art and provide a titanium alloy die forging die.
In order to solve the technical problems, the invention provides the following technical scheme: a titanium alloy die forging die comprises die steel and die forging materials, wherein the die forging materials are located on the upper surface of the die steel, the die forging materials are arranged in a unit body mode, and the unit body comprises a type I unit body, a type II unit body and a type III unit body.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the die steel is H13 hot work die steel.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the swaged material was TC 4.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the unit cell includes positive squamous and negative squamous structures.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the type I unit bodies, the type II unit bodies and the type III unit bodies are arranged at intervals.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the width of the type I unit body is a1, a1 is 1.2-1.5 mm; the depth is b1, and b1 is 0.3-0.5 mm.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the width of the type II unit body model is a2, and a2 is 0.8-1.0 mm; the depth is b2, and b2 is 1.1-1.4 mm.
As a preferable aspect of the titanium alloy die forging die of the present invention, wherein: a type III unit body, wherein the width of the type III unit body model is a3, and a3 is 0.6-0.8 mm; the depth is b3, and b3 is 0.5-0.6 mm.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the inclination angle of the type I unit body is beta 1, the beta 1 is 30-50 degrees, and the inclination angles of the type II unit body and the type III unit body are consistent with that of the type I unit body.
As a preferable mode of the titanium alloy die forging die of the present invention, wherein: the hardness of the die forging material is 502HV-620 HV.
The invention has the beneficial effects that:
the hardness of the bionic unit bodies can reach 502HV-620HV and is 30.4% -61.0% higher than that of the parent metal of the mould. So that in the area with smaller wear degree, the model can effectively block the development of fatigue crack and slow down the wear.
The hardness of the bionic unit bodies can reach 502HV-620HV and is 30.4% -61.0% higher than that of the parent metal of the mould. So that in the area with smaller wear degree, the model can effectively block the development of fatigue crack and slow down the wear.
The invention adopts the surface treatment method of laser melting and consolidation, and combines a mechanical arm to flexibly process the surface of the die with a complex shape, thereby improving the surface strength of the die and the wear resistance of the die and prolonging the service life of the die. And by combining the mechanical arm with the laser, the automatic production is easy to realize, and the human resources are saved.
The invention only comprises the use of die steel and die forging materials, does not need the addition of any other metal materials or non-metal materials, and has the obvious advantage of lower cost by combining the price on the current market.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic diagram of the structures of type I, type II and type III monomers in an example of the present invention;
FIG. 2 is a schematic diagram of the structures of type I, type II and type III monomers in an example of the present invention;
FIG. 3 is a schematic representation of the structure of a mixture of type I, type II and type III monomers of example of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In the present invention, hardness was measured using a Vickers microhardness tester (Model 5104, Manufactured by Buehler Co. Ltd., USA) produced in the United states, and a service life was measured by using the obtained material as a material of a press machine.
Example 1
The invention firstly prepares a coarse stripe type I bionic unit body on the surface of a mould. The width of the coarse stripe bionic unit body is a1, and a1 is 1.2-1.5 mm; the depth is b1, and b1 is 0.3-0.5 mm; the distance between two adjacent unit bodies is c1, and c1 is 0.5-1 mm; the inclination angle of the stripe-shaped bionic unit body is beta 1, and the beta 1 is 30-50 degrees.
Preparing a II-type unit body on the surface of the I-type unit body in a secondary fusing mode at the center of each corresponding unit body, wherein the width of the II-type unit body model is a2, and a2 is 0.8-1.0 mm; depth b2, b2 is 1.1-1.4 mm; the distance between the centers of two adjacent stripe bionic unit bodies is c2, and c2 is 0.8-1.4 mm; the inclination angle of the stripe-shaped bionic unit body is consistent with that of the I-type unit body.
Processing a III type unit body aiming at the middle area of the I type unit body and the II type unit body, wherein the width of the III type unit body model is a3, and a3 is 0.6-0.8 mm; the depth is b3, and b3 is 0.5-0.6 mm; the distance between the centers of two adjacent bionic unit bodies is c3, and c3 is 1.2-1.6 mm; the inclination angle of the stripe-shaped bionic unit body is consistent with that of the I-type unit body.
The 5CrNiMo steel has good toughness, strength and high wear resistance, and belongs to hot work die steel. The mechanical properties of the material are almost the same at room temperature and 500-600 ℃. The hardness of the alloy can be maintained at about HB300 even when the alloy is heated to 500 ℃. The steel is not sensitive to temper embrittlement due to the molybdenum content. After slow cooling from 600 ℃, the impact toughness decreases only slightly.
The performance of the prepared bionic unit body prepared on the surface of the 5CrNiMo die is measured, and the obtained data is shown in Table 1.
TABLE 15 determination of performance of bionic unit body prepared on CrNiMo die surface
As can be seen from FIG. 1, the finished product prepared by the method has good performance, the surface of the mold with the striped bionic unit bodies is prepared on the surface, and the hardness of the treated bionic unit bodies can reach 502HV and can reach 620HV at most, which is 31-57% higher than that of the parent metal of the mold. So that in the area with smaller wear degree, the model can effectively block the development of fatigue crack and slow down the wear.
A coupled bionic functional surface with changeable shape is designed and prepared by laser fusion processing mode on the working surface in different regions and is characterized in that the inclination angle of a striped bionic unit body is beta 1, the beta 1 is 30-60 degrees, a grid unit body is arranged, the included angle of a grid is beta 2, and the beta 2 is 45-90 degrees. The specific shape is shown in fig. 2.
The invention adopts the surface treatment method of laser melting and consolidation, and combines a mechanical arm to flexibly process the surface of the die with a complex shape, thereby improving the surface strength of the die and the wear resistance of the die and prolonging the service life of the die. And by combining the mechanical arm with the laser, the automatic production is easy to realize, and the human resources are saved.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A titanium alloy die forging mould which is characterized in that: the die forging material is arranged on the upper surface of the die steel in a unit form, and the unit form comprises an I-type unit body, an II-type unit body and an III-type unit body.
2. The titanium alloy die forging die as recited in claim 1, wherein: the die steel is H13 hot work die steel.
3. The titanium alloy die forging die as recited in claim 1, wherein: the swaged material was TC 4.
4. The titanium alloy die forging die as recited in claim 1, wherein: the unit cell includes positive squamous and negative squamous structures.
5. The titanium alloy die forging die according to claim 4, wherein: the type I unit bodies, the type II unit bodies and the type III unit bodies are arranged at intervals.
6. The titanium alloy die forging die according to claim 4, wherein: the width of the type I unit body is a1, and a1 is 1.2-1.5 mm; the depth is b1, and b1 is 0.3-0.5 mm.
7. The titanium alloy die forging die according to claim 4, wherein: the width of the II type unit body model is a2, a2 is 0.8-1.0 mm; the depth is b2, and b2 is 1.1-1.4 mm.
8. The titanium alloy die forging die according to claim 4, wherein: the width of the III type unit body model is a3, and a3 is 0.6-0.8 mm; the depth is b3, and b3 is 0.5-0.6 mm.
9. The titanium alloy die forging die according to any one of claims 6, 7 and 8, wherein: the inclination angle of the type I unit body is beta 1, the beta 1 is 30-50 degrees, and the inclination angles of the type II unit body and the type III unit body are consistent with the type I unit body.
10. The titanium alloy die forging die set forth in claim 1, wherein: the hardness of the die forging material is 502HV-620 HV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116235.1A CN114472775A (en) | 2022-01-29 | 2022-01-29 | Titanium alloy die forging mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116235.1A CN114472775A (en) | 2022-01-29 | 2022-01-29 | Titanium alloy die forging mould |
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| Publication Number | Publication Date |
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| CN114472775A true CN114472775A (en) | 2022-05-13 |
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| CN202210116235.1A Pending CN114472775A (en) | 2022-01-29 | 2022-01-29 | Titanium alloy die forging mould |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050025894A1 (en) * | 2003-07-29 | 2005-02-03 | Luquan Ren | Method of improving the wear resistance performance of mechanical component |
| CN1597241A (en) * | 2004-08-16 | 2005-03-23 | 吉林大学 | Mould having bionic non smooth surface |
| US20170225223A1 (en) * | 2014-10-27 | 2017-08-10 | Volkswagen Aktiengesellschaft | Casting mold having at least one cavity for manufacturing at least one cast article |
| CN108115283A (en) * | 2017-12-12 | 2018-06-05 | 吉林大学 | The method and thermal upsetting die of bionic surface are coupled with operating mode preparation according to ingredient |
| CN109158522A (en) * | 2018-07-10 | 2019-01-08 | 吉林大学 | Large Crankshaft mold with coupling bionic surface |
| CN111390136A (en) * | 2020-04-23 | 2020-07-10 | 江苏拜欧尼克智能科技有限公司 | Ductile iron punch with bionic gradient surface and processing method thereof |
| CN112458242A (en) * | 2020-10-29 | 2021-03-09 | 江苏拜欧尼克智能科技有限公司 | Laser bionic strengthening method for heavy-load titanium alloy die forging die |
-
2022
- 2022-01-29 CN CN202210116235.1A patent/CN114472775A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050025894A1 (en) * | 2003-07-29 | 2005-02-03 | Luquan Ren | Method of improving the wear resistance performance of mechanical component |
| CN1597241A (en) * | 2004-08-16 | 2005-03-23 | 吉林大学 | Mould having bionic non smooth surface |
| US20170225223A1 (en) * | 2014-10-27 | 2017-08-10 | Volkswagen Aktiengesellschaft | Casting mold having at least one cavity for manufacturing at least one cast article |
| CN108115283A (en) * | 2017-12-12 | 2018-06-05 | 吉林大学 | The method and thermal upsetting die of bionic surface are coupled with operating mode preparation according to ingredient |
| CN109158522A (en) * | 2018-07-10 | 2019-01-08 | 吉林大学 | Large Crankshaft mold with coupling bionic surface |
| CN111390136A (en) * | 2020-04-23 | 2020-07-10 | 江苏拜欧尼克智能科技有限公司 | Ductile iron punch with bionic gradient surface and processing method thereof |
| CN112458242A (en) * | 2020-10-29 | 2021-03-09 | 江苏拜欧尼克智能科技有限公司 | Laser bionic strengthening method for heavy-load titanium alloy die forging die |
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