CN101285141A - Cast aluminum alloy material for mine-used parts - Google Patents
Cast aluminum alloy material for mine-used parts Download PDFInfo
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- CN101285141A CN101285141A CNA200810055010XA CN200810055010A CN101285141A CN 101285141 A CN101285141 A CN 101285141A CN A200810055010X A CNA200810055010X A CN A200810055010XA CN 200810055010 A CN200810055010 A CN 200810055010A CN 101285141 A CN101285141 A CN 101285141A
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Abstract
The invention discloses a casting aluminum alloy material for a mine-used part, which relates to a casting aluminum alloy material. An aluminum alloy part used in underground coal mines can generate spark due to collision or friction to fire gas and result in explosion accidents. At present, aluminum equipment is forbidden under the coal mines or within 300 meters of an extraction face with hazardous biogases by many countries. The components in percentage by weight of the invention are: 1.0 to 2.5 percent of Zn,3.0 to 5.5 percent of Cu,0.1 to 0.3 percent of Cr,0.1 to 0.2 percent of Ti,0.02 to 0.05 percent of Be,0.01 to 0.03percent of Sr,0.3 to 0.8percent of Mn, 2.5 to 4.5 percent of Rx,less than or equal to 1.5 percent of Si, less than or equal to 0.5 percent of Mg,less than or equal to 0.5 percent of Fe, the balance being Al. The casting aluminum alloy material has the advantages of good safety of frictional spark, low density, good plasticity and corrosion resistance, etc.
Description
Technical field
The present invention relates to the friction sparkless safety type cast aluminum alloy material of parts such as a kind of cast aluminium alloy material, particularly a kind of mine ventilating fan.
Background technology
Auxiliary fan, portable type electric drill, wind coal borer, electric installation shell etc. under the coal mine once caused a lot of accidents because of bump or friction produce spark with the part of aluminium alloy manufacturing.Thereby the safety problem that developed countries is used in mine light alloy material studies for a long time, but do not obtain breakthrough as yet so far.At present, many countries are under coal mine or have in the getting working face 300m of biogas danger the equipment that has banned use of light alloy to make.
China also once had been used as strict regulation to making of down-hole light alloy material: therefore the accident because light alloy material (as ZL401 GB/T1173-1995) impact or the easiest methane gas that ignites of fricative spark are blasted bans use of light alloy material to make mine-used parts.
Summary of the invention
The objective of the invention is to part at existing mining aluminum alloy materials manufacturing the blast shortcoming of accident of methane gas of igniting easily, a kind of cast aluminium alloy material of mine-used parts is provided, its chemical formulation is stable, advanced, advantages such as it is good to have friction spark safety, and density is little, plasticity good, corrosion-resistant.
The present invention is achieved by the following technical solutions:
A kind of cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 1.0～2.5%, Cu 3.0～5.5%, and Cr 0.1～0.3%, and Ti 0.1～0.2%, Be 0.02～0.05%, Sr 0.01～0.03%, and Mn 0.3～0.8%, and Rx 2.5～4.5%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
Described Cr, Mn, Ti, Sr, Be element are for the castability that improves aluminium alloy and mechanical property and a small amount of alloying element that adds.Described Rx element is the additive that adds for the generation of bump when friction spark of suppressing aluminium alloy effectively.Described Si, Mg, Fe are impurity.
The component of described cast aluminium alloy material and preferable weight percent thereof are: Cu 2.5%, and Zn 2.5%, and Cr 0.3%, and Ti 0.15%, and Be 0.03%, and Sr 0.03%, and Mn 0.5%, and Rx 3.2%, the Ai surplus.
Briefly introduce research mechanism of the present invention and experimentation below:
The present invention begins to explore from ignite biogas the most basic principle and phenomenon of light alloy material.When at first having examined the spin friction, high speed impact of domestic various trade mark cast aluminium alloys and free-falling hammer test, a situation arises for spark, studied the process and the condition of spark initiation biogas.Result with high speed dynamic detector test shows: the spark that spin friction produces is a branch of high temperature particle flux, lights biogas and often occurs in a distance apart from friction point; And high speed impact is because aluminium alloy bullet impact or friction produce some powders or little particle, and free-falling hammer impact energy degree big and friction is also comparatively abundant, produces the relatively large fragment of buffing.Adopt high speed photography, take the whole process of lighting starting point, spark duration, spark initiation methane body of friction spark with the speed of 1000 width of cloth/second～3000 width of cloth/second, again to emit picture recording at a slow speed, just can obviously observe: fixedly test specimen of ZL104 cast aluminium alloy is adopted in the spin friction test, with A8 that gets rusty or 45 steel plate rotating-disk test specimens, whirl test under the condition of the relative friction velocity of difference.Test gas with methane air mixed gas (methane concentration 6.5-7%) fixedly test specimen be 51N with weight loading method steady stability snap-in force, the fixing long-pending 100mm that is respectively of test specimen and rotation test specimen frictional contact surface
2And 140mm
2Friction velocity is totally six grades of (20-90) m/s relatively, in 9 tests, all observes the intensity shower of sparks different with brightness, more than 50m/s, contacts moment with deciding test specimen with the rotation test specimen, and be in the scope of 0.41-1.9s ignition time.All below 40m/s, 4 times ignition test gas does not take place in relative friction velocity, have the spark that takes on a red color than dispersive to splash out, its contact friction reaches in the scope of (265-443) s, does not all ignite.And whirl test outer rim place is all adhering to the powder of aluminium alloy.
High speed impact or free-falling hammer shock test:
Under certain energy impact,, have the expansion picture that 4 frames produce spark with cast aluminium alloy test bullet or free-falling hammer impact test piece bump and friction rust steel test board.In next frame picture, can see 1/3rd milliseconds the interior peculiar center that produces red-hot particle of collision time, under the excessive temperature of spark center acquisition, first is watered-air mixture process 1ms retardation time, and in spark, catch fire in the time length, progressively enlarge.A few frame pictures among the figure are to link up mutually, and every width of cloth picture time shutter is about 1/3ms.Form a fireball at last and make in the whole blast groove methane air mixed gas fire burns.The time length of catching fire of free-falling hammer is shorter than high speed impact, and reason is that the energy of impact or friction generation bits sheet or the high red-hot particle of particle is big, and velocity of diffusion increases to some extent.Therefore, the spin friction test duration catches fire the shortest, the easiest catching fire, and the free-falling hammer test is taken second place, and is the high speed impact test at last.
Therefore, the condition from test friction or impact generation spark initiation inflammable gas is:
Be broken for superfine powder when (1) alloy material is clashed into easily, these powders have new surface.
(2) this powder is easy to oxidation and keeps very high temperature in air.
The spark that takes place when (3) colliding possesses necessary temperature or " activator ".
The metal or alloy that possesses above-mentioned condition, even other various materials are in all flashing gaseous combustion blasts of igniting easily of when collision.If aluminium alloy is avoided above-mentioned generation cause of fire element, promptly make the friction spark safety alloy, this should be feasible technically.The Chemical Composition that its technological difficulties are to adjust aluminium alloy improves microstructure, makes alloy have suitable ductility and intensity, does not produce superfine powder when collision friction, just can reduce or avoid flashing.So friction spark safety type cast aluminium alloy, the composition of at first selected chemical element is vital.
On the basis of above-mentioned research, studied the influence that friction produces spark to bump of aluminum alloy chemically element more one by one, through composition screening carefully and technological property test, developed friction spark safety type cast aluminium alloy material of the present invention, the free-falling hammer that simulates operating mode through 15000 times impacts and rub(bing)test, at last, determine the cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 1.0～2.5%, Cu 3.0～5.5%, and Cr 0.1～0.3%, and Ti 0.1～0.2%, Be 0.02～0.05%, Sr 0.01～0.03%, and Mn 0.3～0.8%, and Rx 2.5～4.5%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
Casting fusing point of the present invention is 615～574 ℃, and its density is determined as 3.81～2.77 (g/cm by the described method of Ministry of Metallurgical Industry's standard
3), density mean value is 2.80 (g/cm
3).
Test for tensile strength of the present invention is pressed the GB228-76 standard test, and the tensile test piece size is pressed the GB173-74 standard code and made, and hardness test is pressed the determination of test method of GB251-63 standard, and table 1 is listed the mechanical property of the present invention that main frequency furnace is produced.
Castability of the present invention is with colliery underground equipment shell is approaching with the ZL401 castability at present.Its castability sees Table 2.
The present invention compared with prior art has the following advantages and beneficial effect:
The present invention is preferred more stable, advanced chemical formulation, the casting technique of its casting technique and common aluminum alloy is basic identical, and die casting machine one-step die casting is adopted in the casting of mine ventilating fan aluminium alloy vane.With the aluminium alloy vane of prescription of the present invention casting, its mechanical and physical performance reaches: tensile strength sigma b 〉=180Mpa, unit elongation δ 〉=3.0%, hardness HB 〉=50, advantage such as it is good to have a friction spark safety, and density is little, plasticity good, corrosion-resistant.
The present invention is applicable to blade, impeller making and portable type, miniature movable type or the stent-type hand drill of mine ventilating fan, instrument device housings etc.Its production cost, selling price and ZL401, ZL104 basically identical use cast aluminium alloy material of the present invention can not increase the casting cost.The present invention can also be generalized to chemical industry, oil, light industry, and industries such as fire-fighting, boats and ships have a wide range of applications, and the economy and society benefit is very obvious.
Embodiment
Embodiment 1
A kind of cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 2.5%, Cu 3%, and Cr 0.1%, and Ti 0.1%, Be 0.02%, Sr0.01%, Mn 0.3%, and Rx 2.5%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
Embodiment 2
A kind of cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 1.0%, Cu 5.5%, and Cr 0.3%, and Ti 0.2%, Be 0.05%, Sr0.03%, Mn 0.8%, and Rx 4.5%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
Embodiment 3
A kind of cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 2.5%, Cu 2.5%, and Cr 0.3%, and Ti 0.15%, Be 0.03%, Sr 0.03%, and Mn 0.5%, and Rx 3.2%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
Table 1 cast aluminium alloy tensile property of the present invention summary sheet
Table 2 the present invention and ZL401 castability contrast table
Claims (4)
1, a kind of cast aluminium alloy material of mine-used parts, by weight percentage, the component of this aluminum alloy materials and proportioning thereof are: Zn 1.0～2.5%, Cu 3.0～5.5%, and Cr 0.1～0.3%, and Ti 0.1～0.2%, Be 0.02～0.05%, Sr 0.01～0.03%, and Mn 0.3～0.8%, and Rx 2.5～4.5%, Si≤1.5%, Mg≤0.5%, Fe≤0.5%, surplus Al.
2, according to the cast aluminium alloy material of the described mine-used parts of claim 1, it is characterized in that: the component of described cast aluminium alloy material and preferable weight percent thereof are: Cu 2.5%, Zn 2.5%, Cr 0.3%, and Ti 0.15%, and Be 0.03%, Sr 0.03%, Mn 0.5%, and Rx 3.2%, the Ai surplus.
3, according to the cast aluminium alloy material of the described mine-used parts of claim 1, it is characterized in that: the casting fusing point of described cast aluminium alloy material is 615～574 ℃.
4, according to the cast aluminium alloy material of the described mine-used parts of claim 1, it is characterized in that: the density of described cast aluminium alloy material is 3.81～2.77 (g/cm
3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810055010XA CN101285141A (en) | 2008-05-30 | 2008-05-30 | Cast aluminum alloy material for mine-used parts |
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|---|---|---|---|
| CNA200810055010XA CN101285141A (en) | 2008-05-30 | 2008-05-30 | Cast aluminum alloy material for mine-used parts |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660693A (en) * | 2011-12-15 | 2012-09-12 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy treated by using TiN powder and BeH2 powder, and preparation method thereof |
| CN104911418A (en) * | 2015-05-16 | 2015-09-16 | 李白 | Ventilator for coal mine safety |
| CN104805341B (en) * | 2015-05-16 | 2016-11-30 | 顾玉奎 | A kind of high security mining high intensity ventilation blower |
| CN108149162A (en) * | 2017-12-27 | 2018-06-12 | 宁波市江北吉铭汽车配件有限公司 | A kind of high intensity guider |
| CN108165902A (en) * | 2017-12-27 | 2018-06-15 | 宁波市江北吉铭汽车配件有限公司 | A kind of gasoline tank |
| CN109112372A (en) * | 2018-10-17 | 2019-01-01 | 合肥月煌新型装饰材料有限公司 | A kind of high-strength abrasion-proof aluminum alloy materials and preparation method thereof |
-
2008
- 2008-05-30 CN CNA200810055010XA patent/CN101285141A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660693A (en) * | 2011-12-15 | 2012-09-12 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy treated by using TiN powder and BeH2 powder, and preparation method thereof |
| CN102660693B (en) * | 2011-12-15 | 2013-06-26 | 贵州华科铝材料工程技术研究有限公司 | Aluminum alloy treated by using TiN powder and BeH2 powder, and preparation method thereof |
| CN104911418A (en) * | 2015-05-16 | 2015-09-16 | 李白 | Ventilator for coal mine safety |
| CN104805341B (en) * | 2015-05-16 | 2016-11-30 | 顾玉奎 | A kind of high security mining high intensity ventilation blower |
| CN104911418B (en) * | 2015-05-16 | 2016-12-07 | 南安市智德机械设备有限公司 | A kind of safety of coal mines ventilation blower |
| CN108149162A (en) * | 2017-12-27 | 2018-06-12 | 宁波市江北吉铭汽车配件有限公司 | A kind of high intensity guider |
| CN108165902A (en) * | 2017-12-27 | 2018-06-15 | 宁波市江北吉铭汽车配件有限公司 | A kind of gasoline tank |
| CN109112372A (en) * | 2018-10-17 | 2019-01-01 | 合肥月煌新型装饰材料有限公司 | A kind of high-strength abrasion-proof aluminum alloy materials and preparation method thereof |
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Open date: 20081015 |