CN101987354A - Grain refining process method of silver alloy cast structure - Google Patents
Grain refining process method of silver alloy cast structure Download PDFInfo
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- CN101987354A CN101987354A CN2009100128023A CN200910012802A CN101987354A CN 101987354 A CN101987354 A CN 101987354A CN 2009100128023 A CN2009100128023 A CN 2009100128023A CN 200910012802 A CN200910012802 A CN 200910012802A CN 101987354 A CN101987354 A CN 101987354A
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Abstract
The invention relates to a grain refining process method of a silver alloy cast structure. The manufacturing method comprises all conventional procedures of melting, deslagging, degassing and refining of silver alloy ingredients and is characterized by applying one ultrasonic field to an alloy liquid through a casting mold in the alloy casting process, the frequency of ultrasonic waves applied to the casting mold of silver alloy casting is 25000-40000 Hz, the sound intensity of the ultrasonic field is 10-500 W, and the average acoustic impedance is 2.52*10<7>-6.25*10<7> kg/m<2>.s. Finally, the alloy liquid is naturally cooled to room temperature to obtain the silver alloy blank with refined grains and uniform structure. In the invention, the metallographic structure of the silver alloy can be changed and refined and the mechanical properties of the silver alloy material can be improved through the simple process method and simple production equipment, which is beneficial to the subsequent pressure machining of cast ingots.
Description
Technical field
The present invention relates to the grain refinement process of a kind of silver alloy cast sturcture, belong to metal alloy casting technique and rotten treatment process field.
Background technology
The performance of metal material is determined by its tissue and structure, and the grain size of metal is one of key character parameter of tissue after the crystallization, so will and how control grain size and carry out necessary research the grain size behind the metallic crystal.The method of existing metal structure refinement mainly contains two classes: the one, and chemical refinement method, this method are to add alterant in molten metal bath, comprise nucleating agent and grain size inhibitor etc.; The 2nd, the physical thinning method is as mechanical oscillation, electric and magnetic oscillation, mechanical agitation and bubble agitation etc.All there is weak point in said method, at first is to add additive can introduce impurity element, more or less can cause the even segregation phenomena of chemical constituent and tissue odds, even form nonmetal inclusion; Next is that the big or power consumption of the required equipment complexity of physical method, investment is big etc.
The ultrasonic vibration method is being studied aspect the ingot structure refinement of metal and alloy at present, but has just roughly studied the influence of ultrasonic frequency height to crystallite dimension.These development tests do not have the concrete major parameter that system studies ultrasonic field all sidedly, as the change of the sound intensity and the acoustic impedance regularity influence to the refinement of silver alloy solidified structure.
Summary of the invention
The grain refinement process that the purpose of this invention is to provide a kind of silver alloy cast sturcture particularly provides a kind of process of ultrasonic field refinement silver alloy tissue; Another object of the present invention provides the comparatively concrete major parameter of the sound intensity of system, to obtain the best thinning effect of silver alloy tissue.
The present invention is applied to multicomponent with ultrasonic technology first, and the bigger welding of experiment difficulty is with on the silver alloy, and the welding silver alloy is a kind of silver alloy of extensive use in the industrial production.
The invention provides a kind of thinning process of silver alloy solidified structure, comprise silver alloy batching through the fusing of routine, remove slag, degasification, each operation of refining, it is characterized in that in the cast alloy process, applying a ultrasonic field, on the silver alloy shell, install ultrasonic transducer, at casting front opening supersonic generator, and the parameter of regulating the ultrasonic sound intensity, solidify and naturally cool to room temperature up to silver alloy liquid, can obtain the silver alloy blank of grain refinement, even tissue.The frequency of ultrasonic that is added in silver alloy casting mold is 25000--40000Hz, and the sound intensity of ultrasonic field is 10-500W, and average acoustic impedance is 2.52 * 10
7-6.25 * 10
7Kg/m
2S.
By the processing of ultrasonic field, the solidified structure of silver alloy all can obtain refinement in various degree, and the size of crystal grain has bigger influence to drawing abillity.
Advantageous effect of the present invention is as follows:
The advantage of the inventive method is by simple process and simple production equipment, can change the metallographic structure with the refinement silver alloy, improves the mechanical property of silver alloy, is beneficial to the pressure processing of follow-up ingot casting.
The specific embodiment
Content of the present invention is described in detail by embodiment, does not limit but be not implemented example.
The present invention is earlier melted the silver alloy batching, remove slag, is taken out alloy liquid after the degasification, refining with conventional process, at the silver alloy liquid front opening supersonic generator of casting, regulates frequency of ultrasonic, the sound intensity, configures acoustic impedance.Silver alloy liquid is poured in the mold, make it naturally cool to room temperature, can obtain the silver alloy blank of grain refinement, even tissue.
The chemical composition of the silver alloy that the inventive method is used is that Ag-Cu-Zn-Mn is an alloy.
The silver alloy that the inventive method adopts is near the 40AgCuZnMn trade mark, and its chemical composition is:
| Ag | Cu | Zn | Mn | Ni |
| Surplus | 35 | 18 | 5 | 2 |
The silver alloy batching melts refining process as previously mentioned, and the silver alloy liquid of gained pours into mold at 620-700 ℃, opens supersonic generator, and adjusting configures hyperacoustic parameter.Its frequency of ultrasonic is 40000Hz, and the sound intensity of ultrasonic field is 430W, and average acoustic impedance is 3.95 * 10
7Kg/m
2S.Naturally cool to room temperature, solidify the resulting silver alloy metallographic structure in back, through the metallography microscope sem observation, find that its white portion is the initial alpha phase, present granular form, its black part is divided into eutectic structure, in the form of sheets.
The silver alloy that silver alloy after employing the inventive method ultrasonic field is handled and traditional routine are solidified, the two can do one relatively.The former as previously mentioned, initial alpha mutually and eutectic structure all obtained obvious refinement, and the latter can find tangible flourishing dendrite, though its eutectic structure is needle-like and sheet, organizes thick.The former crystallite dimension is the 1/8--1/15 of latter's crystallite dimension.
From the foregoing description as seen, process of the present invention proves that ultrasonic field is solidified metallographic structure to silver alloy and had bigger influence, and the reasonable disposition of relevant parameter can reach best solidified structure.
Claims (1)
1. the thinning process of a silver alloy solidified structure, it is characterized in that comprising following process: silver alloy batching through the fusing of routine, remove slag, degasification, each operation of refining, in the cast alloy process, apply a ultrasonic field for alloy liquid by mold, the frequency of ultrasonic that is added in silver alloy casting mold is 25000--40000Hz, the sound intensity of ultrasonic field is 10-500W, and average acoustic impedance is 2.52 * 10
7-6.25 * 10
7Kg/m
2S makes it naturally cool to room temperature at last, can obtain the silver alloy blank of grain refinement, even tissue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100128023A CN101987354A (en) | 2009-07-30 | 2009-07-30 | Grain refining process method of silver alloy cast structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100128023A CN101987354A (en) | 2009-07-30 | 2009-07-30 | Grain refining process method of silver alloy cast structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101987354A true CN101987354A (en) | 2011-03-23 |
Family
ID=43744254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100128023A Pending CN101987354A (en) | 2009-07-30 | 2009-07-30 | Grain refining process method of silver alloy cast structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101987354A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643072A (en) * | 2013-11-20 | 2014-03-19 | 北海鑫利坤金属材料科技开发有限公司 | Silver alloy material with good mechanical property |
| CN105562633A (en) * | 2011-04-01 | 2016-05-11 | 伊克一有限责任公司 | Machine for forming metal bars |
-
2009
- 2009-07-30 CN CN2009100128023A patent/CN101987354A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105562633A (en) * | 2011-04-01 | 2016-05-11 | 伊克一有限责任公司 | Machine for forming metal bars |
| CN103643072A (en) * | 2013-11-20 | 2014-03-19 | 北海鑫利坤金属材料科技开发有限公司 | Silver alloy material with good mechanical property |
| CN103643072B (en) * | 2013-11-20 | 2015-12-09 | 北海鑫利坤金属材料科技开发有限公司 | A kind of silver alloy with excellent mechanical performances |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110323 |