CN108251699A - The high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting - Google Patents
The high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting Download PDFInfo
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- CN108251699A CN108251699A CN201810188578.2A CN201810188578A CN108251699A CN 108251699 A CN108251699 A CN 108251699A CN 201810188578 A CN201810188578 A CN 201810188578A CN 108251699 A CN108251699 A CN 108251699A
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- casting
- alloy
- die casting
- zinc
- kirsites
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C18/00—Alloys based on zinc
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/165—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon of zinc or cadmium or alloys based thereon
Abstract
The invention discloses the high heat conduction Ba Re Sn kirsites and its processing technology of suitable cold chamber die casting.According to weight percent, the ingredient of the alloy is：Ba:0.5‑0.8wt.%,Re:0.2‑0.4wt.%；Sn:2.0‑4.0wt.%,Si:6.0 8.0wt.%, Mn:0.2‑0.6wt.%,Th:0.2 0.4wt.%, surplus are zinc.The zinc barium alloy has excellent die casting performance, can be used for the long thin-walled parts of production.Moreover, in press casting procedure, cold house may be used and cast, substantially increase production efficiency and reduce energy consumption.Products obtained therefrom has been widely used in electric appliance process industry and radio industry.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of zinc barium alloy.
Background technology
In China, zinc is one of major metal given priority in nonferrous metal industry.The zinc resource reserves in China are very
It is abundant, it can also largely be exported while domestic demand is met.And replace copper alloy and aluminium alloy with kirsite, saving energy
Source, reduction material cost and reasonable disposition national resource etc. are all significant.With constantly going out for novel die-casting technique
Existing, die casting is also no longer limited to auto industry and measurement instrument industry, but is gradually expanded to such as electronics industry, haberdashery and hardware row
Industry.The Zinc alloy casting main application in China is toy (vehicle mould), haberdashery and hardware (knob, lock, sanitary ware), slide fastener, instrument
Part and the industrial wearing piece of some mechanical, wherein toy industry, hardware industry zinc die casting alloys are most.
Kirsite can be divided into cast zinc alloy and deformation zinc alloy two types by manufacturing processing technic.Pressure is die carter
The essential characteristic of skill and acquisition cast structure densification and clear-cut security factors.Cast zinc alloy is cast according to it
Method can be divided into compression casting kirsite and gravitational casting kirsite again.Wherein, compression casting kirsite develops relatively more early,
Critical role is always maintained in hot chamber diecasting.
There are many advantages of cast zinc alloy, and first, fusing point is low, and when melting is not oxidizable, keep the temperature more convenient, pressure chamber and die casting
Die wall is heated less, extends the service life of casting mold;Secondly, good casting property, good fluidity under molten condition, does not inhale iron, no
Easy sticking to mould;In addition, in mechanical properties, there is kirsite higher intensity and wear resistance and shock resistance plasticity to become
The property of shape ability and easy processing is all that other materials are irreplaceable, therefore kirsite is widely used in thin-wall product and right
The die-cast product that surface smoothness requirements are high, need to be electroplated.But cast zinc alloy is also easy to produce intergranular corruption simultaneously there is also easy to aging
The shortcomings of erosion, corrosion resistance is poor, this also hinders the popularization and application of cast zinc alloy to a certain extent.
In Die Casting, in addition to design of Die Casting factor, pouring temperature, filling velocity and the mold work of existing kirsite
Influence of the temperature to liquid metal filling fluidised form and final quality of die casting is also more notable.Pouring temperature is excessively high, and molten metal is easy
In oxidation and sticking to mould, the defects of die casting is made to generate stomata, while it can also shorten die life;Pouring temperature is too low, then
The mobility of molten metal can be reduced, leads to the cold defect such as misrun.Mold temperature is excessively high, is easy to cause sticking to mould, opens the film time and prolong
It is long etc., influence production efficiency;Mold temperature is too low, and molten metal heat dissipation is too fast, it is possible to cause to solidify in advance and influence to fill type effect
Fruit;And filling velocity it is excessively high easily cause turbulent flow, volume gas phenomena such as, can also accelerate the abrasion of die casting.Filling Processes of Castings and solidification
Process largely affects the quality of cast product, but is completed in die cavity due to filling type and process of setting, thus
It is understood and is controlled extremely difficult.
Oneself the external casting character of the novel die casting kirsite through exploitation can't be satisfactory.In addition, heat transfer property
Maintain 40-60W/mK, it is impossible to fully meet the requirement of modern industry.The high heat conduction zinc that exploitation has excellent casting character closes
Gold is there are two types of method, and one kind is to add in alloying element to strengthen matrix by solution strengthening, and another kind is by adding in the second phase
Hardening constituent forms Zinc-base compounded material.Barium adds in kirsite the castability that can greatly improve kirsite as alloy element
Energy and heat conductivility.With the rapid industrial development in our country, developing the kirsite of novel die casting high heat conduction has become inevitable.
The characteristics of zinc barium alloy is maximum is that melt easily aoxidizes burning in smelting process, generates loose oxidation film and nitridation
Film.This unsound bath surface compound film cannot prevent the diffusion of oxygen and nitrogen to bath surface, result in barium and exist
Continuous oxidation and consumption of the alloy melt in fusion process.Therefore, generally using argon gas protection in the smelting of zinc barium alloy
Method carries out alloy preparation.This method to some extent there is high expensive, casting be also easy to produce flux be mingled with, equipment it is complicated
The shortcomings of.Therefore the development of zinc barium alloy, exploitation is made to be restricted with application.Thus it is being badly in need of large-scale use aluminium barium alloy
Industry and national defence, always exist the present situation that existing yield is few, and technique is cumbersome, and the urgent needs such as of high cost overcome.
Being reached by the method for alloying prevents the oxidation of the zinc barium alloy melt in smelting process, is to solve the alloy smelting
One of developing direction of refining problem.Alloying ignition-proof and the mechanism for preventing barium from volatilizing in fusion process are that addition is closed in the alloy
Gold element influences the thermodynamics and dynamics process of alloy oxidation, and the dense oxide with protective effect is formed in alloy surface
Film and nitride film achieve the purpose that prevent alloy vigorous oxidation.Compared with argon gas is protected, alloying ignition-proof can eliminate flux folder
It is miscellaneous, improve the mechanical property of alloy.In addition, the content that various alloying elements are balanced in zinc barium alloy is also possible that final zinc
Barium alloy product will also possess satisfactory casting character and heat conductivility simultaneously.Smelting processing method is simple, production cost
Than relatively low, reduce to equipment requirement.So that alloy service life is further improved, convenient for industrializing large-scale application.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, provide one kind can under 450-500 degree atmospheric conditions into
The high heat conduction Ba-Re-Sn kirsites and its processing technology of the suitable cold chamber die casting of row melting.And in this temperature range melting
Alloy final products not only have excellent cold chamber die casting performance, and heat conductivility is also significantly larger than existing kirsite.The party
Method also have production cost it is low, convenient for large-scale production the characteristics of.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting.By weight percentage, the composition of alloy is：Ba:
0.5-0.8wt.%,Re:0.2-0.4wt.%；Sn:2.0-4.0wt.%,Si:6.0-8.0wt.%, Mn:0.2-0.6wt.%, Th:
0.2-0.4wt.%, surplus are zinc.The zinc barium alloy is in fusion process because of the weight for volatilizing and forming the reasons such as clinker and losing
In 1.0-3.0wt.% or so.
The preparation method of the high heat conduction Ba-Re-Sn kirsites of above-mentioned suitable cold chamber die casting, includes the following steps：It will be as
The raw material of upper proportioning is added in the electric induction furnace of atmosphere protection, and using silicon carbide crucible；Sensing heating is to 450-500 degree shapes
It is sufficiently stirred 10 minutes or so into alloy solution, and using electromagnetic agitation effect；Alloy liquid in 450-500 degree is kept the temperature and is stood
It is cast to progress semi-continuous casting in the same level equipment of heat top after ten minutes and moves down speed into required side's ingot and billet, ingot casting
For 20-25m/min.The ingot casting can prepare the zinc barium of complicated shape as cast raw material for the compression casting of subsequent handling
Alloy-steel casting；The last heat treatment procedure of these casting is：Vacuum solid solution handles 240 degree, 2.0 hours；Vacuum aging processing 125
Degree, 1.0 hours.
Compared with prior art, the present invention has the advantages that：
（1）Patent of the present invention is directed to bad and heat transfer property is paid no attention to currently used for the kirsite cold chamber die casting performance of die casting
The state thought provides a kind of novel materialogy solution.The alloy has extremely excellent flame retardant property, can reach
5 hours are stood without significantly burning under atmospheric environment in 450-500 temperature ranges.It is stirred to liquid alloy
During the melt treatments such as mixing, blowing, after its skin covering of the surface is destroyed because being vigorously stirred, can rapid regeneration, successfully hinder alloy
Burning.And the weight that the zinc barium alloy loses in fusion process because of the reasons such as volatilization and formation clinker is less than 3.0wt.%
Left and right.
（2）The zinc barium alloy and with good fluidity, filling performance is favourable, shrinkage cavity formability is small, and molten metal is inspiratory
The advantages that small.With low liquid-solid phase solidification temperature range, hot cracking tendency is big when can solve to cast, and casting is empty and loose bright
Aobvious product yield rate is low to wait technical barriers.
（3）Although existing die casting kirsite is easy to die casting, but for thin wall of the thickness less than 1mm, casting
Illiquidity.Common problem is that yields is low, surface presentation quality is not good enough, surface be susceptible to streamline trace,
The casting flaws such as spot, loose, it is difficult to ensure that the bright and clean smooth quality requirement of product surface, and bring very big surface dressing
Work load increases production cost.Kirsite provided by the invention successfully overcomes the above-mentioned of traditional die casting kirsite
Shortcoming, the latent heat of phase change for substantially increasing the mobility of kirsite melt and being released in solidification, so as to be used for cold house's pressure
Casting.Zinc die casting alloys product provided by the invention, not only significantly improves the die casting yield rate of zinc products, but also can successfully press
The ultrathin zinc products that thickness is less than 0.05mm are cast, apply to the kirsite of ultrathin wall member die casting.In addition, final products are also
With excellent heat transfer property.Heat transfer coefficient maintains 90-110W/mK, and the heat transfer coefficient of traditional die casting kirsite exists
40-60 W/m·K。
Specific embodiment
Embodiment 1
A kind of high heat conduction Ba-Re-Sn kirsites for being suitble to cold chamber die casting in 450 degree of meltings.By weight percentage, alloy
Chemical composition is：Ba: 0.6wt.%,Re:0.3wt.%；Sn:2.8wt.%,Si:6.4wt.%, Mn:0.5wt.%, Th:
0.3wt.%, surplus are zinc.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and
Using silicon carbide crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using electromagnetic agitation effect to 450 degree
It is right；Alloy liquid is stood to be cast to after ten minutes in the same level equipment of heat top in 450 degree of heat preservations and carries out semi-continuous casting into institute
The square ingot and billet needed, ingot casting move down speed as 20m/min.The ingot casting can regard the pressure that cast raw material is used for subsequent handling
Power casts the zinc barium alloy casting to prepare complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution processing 240
Degree, 2.0 hours；Vacuum aging handles 125 degree, 1.0 hours.
Zinc die casting alloys product provided by the invention, not only significantly improves the die casting yield rate of zinc products, but also can be into
Work(die casting thickness be less than the ultrathin zinc products of 0.05mm, apply to the kirsite of ultrathin wall member die casting.Existing pressure
Although casting kirsite is easy to die casting, but for thin wall of the thickness less than 1mm, casting fluidity is insufficient.Generally existing
The problem of be that yields is low, surface presentation quality is not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose,
It is difficult to ensure that the bright and clean smooth quality requirement of product surface, and very big surface dressing work load is brought, increase production
Cost.The new zinc alloy that the present invention designs completely overcomes disadvantage mentioned above, and final products also have excellent heat transfer
Performance.Heat transfer coefficient maintains 96W/mK, and the heat transfer coefficient of traditional die casting kirsite is in 40-60 W/mK.And the zinc
Barium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 2.1wt.% or so.
Embodiment 2
A kind of high heat conduction Ba-Re-Sn kirsites for being suitble to cold chamber die casting in 470 degree of meltings.By weight percentage, alloy
Chemical composition is：Ba: 0.6wt.%,Re:0.3wt.%；Sn:3.2wt.%,Si:7.5wt.%, Mn:0.5wt.%, Th:
0.3wt.%, surplus are zinc.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and
Using silicon carbide crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using electromagnetic agitation effect to 470 degree
It is right；Alloy liquid is stood to be cast to after ten minutes in the same level equipment of heat top in 470 degree of heat preservations and carries out semi-continuous casting into institute
The square ingot and billet needed, ingot casting move down speed as 24m/min.The ingot casting can regard the pressure that cast raw material is used for subsequent handling
Power casts the zinc barium alloy casting to prepare complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution processing 240
Degree, 2.0 hours；Vacuum aging handles 125 degree, 1.0 hours.
Zinc die casting alloys product provided by the invention, not only significantly improves the die casting yield rate of zinc products, but also can be into
Work(die casting thickness be less than the ultrathin zinc products of 0.05mm, apply to the kirsite of ultrathin wall member die casting.Existing pressure
Although casting kirsite is easy to die casting, but for thin wall of the thickness less than 1mm, casting fluidity is insufficient.Generally existing
The problem of be that yields is low, surface presentation quality is not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose,
It is difficult to ensure that the bright and clean smooth quality requirement of product surface, and very big surface dressing work load is brought, increase production
Cost.The new zinc alloy that the present invention designs completely overcomes disadvantage mentioned above, and final products also have excellent heat transfer
Performance.Heat transfer coefficient maintains 102W/mK, and the heat transfer coefficient of traditional die casting kirsite is in 40-60 W/mK.It and should
Zinc barium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 1.4wt.% or so.
Embodiment 3
A kind of high heat conduction Ba-Re-Sn kirsites for being suitble to cold chamber die casting in 490 degree of meltings.By weight percentage, alloy
Chemical composition is：Ba: 0.6wt.%,Re:0.3wt.%；Sn:2.9wt.%,Si:7.2wt.%, Mn:0.3wt.%, Th:
0.2wt.%, surplus are zinc.The preparation method of alloy：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and
Using silicon carbide crucible；Sensing heating forms alloy solution, and be sufficiently stirred 10 minutes left sides using electromagnetic agitation effect to 490 degree
It is right；Alloy liquid is stood to be cast to after ten minutes in the same level equipment of heat top in 490 degree of heat preservations and carries out semi-continuous casting into institute
The square ingot and billet needed, ingot casting move down speed as 22m/min.The ingot casting can regard the pressure that cast raw material is used for subsequent handling
Power casts the zinc barium alloy casting to prepare complicated shape；The last heat treatment procedure of these casting is：Vacuum solid solution processing 240
Degree, 2.0 hours；Vacuum aging handles 125 degree, 1.0 hours.
Zinc die casting alloys product provided by the invention, not only significantly improves the die casting yield rate of zinc products, but also can be into
Work(die casting thickness be less than the ultrathin zinc products of 0.05mm, apply to the kirsite of ultrathin wall member die casting.Existing pressure
Although casting kirsite is easy to die casting, but for thin wall of the thickness less than 1mm, casting fluidity is insufficient.Generally existing
The problem of be that yields is low, surface presentation quality is not good enough, surface is susceptible to the casting flaws such as streamline trace, spot, loose,
It is difficult to ensure that the bright and clean smooth quality requirement of product surface, and very big surface dressing work load is brought, increase production
Cost.The new zinc alloy that the present invention designs completely overcomes disadvantage mentioned above, and final products also have excellent heat transfer
Performance.Heat transfer coefficient maintains 105W/mK, and the heat transfer coefficient of traditional die casting kirsite is in 40-60 W/mK.It and should
Zinc barium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 2.6wt.% or so.
Claims (3)
1. a kind of high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting；According to weight percent, the ingredient of the alloy is：
Ba: 0.5-0.8wt.%,Re:0.2-0.4wt.%；Sn:2.0-4.0wt.%,Si:6.0-8.0wt.%, Mn:0.2-0.6wt.%,
Th:0.2-0.4wt.%, surplus are zinc.
2. it is suitble to the high heat conduction Ba-Re-Sn kirsites of cold chamber die casting according to claim 1, it is characterised in that including such as
Lower step：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and using silicon carbide crucible；Sensing heating arrives
450-500 degree forms alloy solution, and is sufficiently stirred 10 minutes or so using electromagnetic agitation effect；By alloy liquid in 450-
500 degree of heat preservations, which stand to be cast to after ten minutes in the same level equipment of heat top, carries out semi-continuous casting into required billet, ingot casting
Speed is moved down as 20-25m/min.
3. it is suitble to the high heat conduction Ba-Re-Sn kirsites of cold chamber die casting according to claim 1, it is characterised in that comprising such as
Lower procedure of processing：The ingot casting can be closed as cast raw material for the compression casting of subsequent handling to prepare the zinc barium of complicated shape
Golden casting；The last heat treatment procedure of these casting is：Vacuum solid solution handles 240 degree, 2.0 hours；Vacuum aging processing 125
Degree, 1.0 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188578.2A CN108251699A (en) | 2018-03-07 | 2018-03-07 | The high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810188578.2A CN108251699A (en) | 2018-03-07 | 2018-03-07 | The high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108251699A true CN108251699A (en) | 2018-07-06 |
Family
ID=62746051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810188578.2A Withdrawn CN108251699A (en) | 2018-03-07 | 2018-03-07 | The high heat conduction Ba-Re-Sn kirsites of suitable cold chamber die casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108251699A (en) |
-
2018
- 2018-03-07 CN CN201810188578.2A patent/CN108251699A/en not_active Withdrawn
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Application publication date: 20180706 |