CN1059373A - Make the low melting point alloy of fuse sheet - Google Patents
Make the low melting point alloy of fuse sheet Download PDFInfo
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- CN1059373A CN1059373A CN 90106362 CN90106362A CN1059373A CN 1059373 A CN1059373 A CN 1059373A CN 90106362 CN90106362 CN 90106362 CN 90106362 A CN90106362 A CN 90106362A CN 1059373 A CN1059373 A CN 1059373A
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Abstract
The invention discloses a kind of low melting point Sn-In alloy of making light-duty fuse sheet for pressure cooker that is applicable to.The chemical ingredients of this alloy is that indium contains 21.4-51% (weight), and surplus is a tin.This alloy has good processing properties, and is easy to the processing and fabricating fuse piece, does not contain the metallic element of victimization body health in the alloy, and is highly sensitive, safe and reliable with the fuse sheet that this material is made, and installation is comparatively convenient.
Description
The present invention relates to a kind of alloy material of making pressure cooker safeguard protection element, particularly a kind of low melting point Sn-In alloy of making light-duty fuse sheet for pressure cooker.
The present domestic pressure cooker product that has two types: a kind ofly be to use comparatively common coventional type pressure cooker, its operating pressure is 100 kPas, and safe pressure is 200 ± 40 kPas, and collapsing pressure is 600 kPas (colding pressing); Another kind is the light-duty pressure cooker that newly advances to come out, and its operating pressure is 50 kPas, and safe pressure is 100 kPas, and collapsing pressure is 300 kPas (hot pressing), because its wall is thin, pressure is low, thereby saves material than coventional type pressure cooker, cost is low.Make existing two kinds of alloys of metallic substance of fuse sheet for pressure cooker: a kind of is lead-bismuth alloy, contains 58% lead, and 42% has bismuth; Another kind is Sn-Bi-Pb alloy, contains the bismuth of 13-20%, the lead of 30-40%, and all the other are tin.Above-mentioned two kinds of alloys all only are used to make the coventional type fuse sheet for pressure cooker at present, in two kinds of alloys lead tolerance all up to more than 30% unfavorable because Toxicity of Lead is bigger to HUMAN HEALTH, do not meet the relevant regulations of state food assanation yet.For making present domestic which production that also do not have of light-duty fuse sheet for pressure cooker; now commercially available light-duty pressure cooker is to replace fuse sheet with the safeguard protection element that spring-loaded valve is made pressure cooker; though this spring-loaded valve is longer work-ing life; do not need to change in short-term; but it is tighter that its tolerance range when mechanical workout requires, otherwise the phenomenon that can leak air when using, this outer spring place also easily enters foreign matter; its sensitivity is descended, comparatively bothersome during installation.
The object of the present invention is to provide a kind of low melting point Sn-In alloy of making light-duty fuse sheet for pressure cooker, it not only has non-toxic nature, and is easy to processing, and with the fuse sheet that this material is made, sensitivity is higher, safe and reliable and install comparatively convenient.
The object of the present invention is achieved like this: fuse sheet adopts the Sn-In alloy material, and wherein indium contains 21.4-51%(weight), surplus is a tin.
In the Sn-In alloy of the present invention the selection reason of each element and alloy component range really theorem by as follows:
The fusing point of tin is low by (231,968 ℃), the plasticity height (δ=45-60%), recrystallization temperature low (10-25 ℃), do not produce tangible workhardness phenomenon through strong cold working yet, fuse sheet is made requirement must have good plasticity, or even superplasticity, and the selection of tin element meets this requirement just.Tin is nontoxic, can not make the food toxigenicity, the zinc-plated can body of doing of iron plate, and the zinc-plated chafing dish of doing of copper coin also can be made other food product containers.
Indium is a kind of silvery white metal with strong metalluster, belongs to dissipated metal, and plasticity is also very big, almost can ad infinitum be out of shape under pressure.Nontoxic, be used for medical aspect and can make dental alloy.The fusing point of indium low (156.6 ℃) can reduce the fusing point of tin, can form alloys with many elements.The unit elongation of indium higher (can reach 22%) adds and does not produce the work hardening phenomenon man-hour.
By Sn-In alloy phasor (seeing accompanying drawing) as can be known, alloy melting point is 120-190 ℃, eutectic reaction takes place in the time of 120 ℃, the weight percent of alloy and atomic percent are much at one, adopt the fraction method in the single-factor optimization to choose the alloy usage range, the indium of tin-21.4-51% satisfies every technical indicator of technical requirements just in this scope, best alloys range is that indium contains 21.4-30%, the whole conformance with standard requirements of withstand voltage numerical value, when indium content surpasses 51%, but also processing and fabricating fuse sheet, but cost is higher.
Production process of the present invention is as follows:
Melting, casting: carry out melting with resistance furnace or cooking-pot type, through the melting that feeds intake after the strict charge calculation, tin slab adopts Sn
1-Sn
2Number, the stanniferous amount is more than 99.75-99.9%, the indium ingot adopts thick indium, contain the indium amount more than 99.9%, feed way is to add tin earlier, treat to add indium again after its fusing, stir, add vegetables oil (as soya-bean oil, peanut oil or rape oil), consumption is 0.05 kilogram/100 kilograms material, carry out slagging and degassing, remove oil and lime-ash on the liquid level with cotton yarn, leave standstill the back casting, time of repose 20 minutes, casting temp is chosen in 135-150 ℃ of scope (being 1.15 times of fusing points), the ingot casting specification: 150 * 100 * 8(millimeter) (long * wide * thick).
Rolling: as to adopt two the roller small section mill is rolling to get final product, need not to carry out process annealing.
Punching press: adopt small-sized punch press, dash about 20 at every turn.
Clean: adopt gasoline cleaning, air-dry.
Trimmed size: φ 8(millimeter), 0.35 millimeter of thickness.
Advantage of the present invention is: have good processing properties, and the alloy component range broad, easily control has argenteous metalluster, and good corrosion resistance does not contain the metallic element of victimization body health in the alloy, pollution-free, meets the state food assanation.Highly sensitive, easy for installation with the fuse sheet that this material is made.
Claims (1)
1, a kind of low melting point alloy of making light-duty fuse sheet for pressure cooker that is applicable to, it is characterized in that: this alloy contains the indium of 21.4-51% (weight), and surplus is a tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106362 CN1059373A (en) | 1990-08-28 | 1990-08-28 | Make the low melting point alloy of fuse sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90106362 CN1059373A (en) | 1990-08-28 | 1990-08-28 | Make the low melting point alloy of fuse sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1059373A true CN1059373A (en) | 1992-03-11 |
Family
ID=4880003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90106362 Pending CN1059373A (en) | 1990-08-28 | 1990-08-28 | Make the low melting point alloy of fuse sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059373A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404716C (en) * | 2006-06-14 | 2008-07-23 | 四川省有色冶金研究院 | Non-pollution lower melting point alloy |
| CN101180483B (en) * | 2005-04-14 | 2010-07-07 | 千住金属工业株式会社 | Alloy for fusible plug and fusible plug |
| CN101804429A (en) * | 2010-03-26 | 2010-08-18 | 东莞市旗丰消声器有限公司 | Bending process of double-layer pipe |
-
1990
- 1990-08-28 CN CN 90106362 patent/CN1059373A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180483B (en) * | 2005-04-14 | 2010-07-07 | 千住金属工业株式会社 | Alloy for fusible plug and fusible plug |
| CN100404716C (en) * | 2006-06-14 | 2008-07-23 | 四川省有色冶金研究院 | Non-pollution lower melting point alloy |
| CN101804429A (en) * | 2010-03-26 | 2010-08-18 | 东莞市旗丰消声器有限公司 | Bending process of double-layer pipe |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |