CN103045903B - Brass alloy bar replacing lead element by unidirectionally cutting bismuth, aluminium and tin and preparation for same - Google Patents
Brass alloy bar replacing lead element by unidirectionally cutting bismuth, aluminium and tin and preparation for same Download PDFInfo
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- CN103045903B CN103045903B CN201310016352.1A CN201310016352A CN103045903B CN 103045903 B CN103045903 B CN 103045903B CN 201310016352 A CN201310016352 A CN 201310016352A CN 103045903 B CN103045903 B CN 103045903B
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Abstract
The invention discloses a brass alloy bar replacing lead element by unidirectionally cutting bismuth, aluminium and tin, comprising the following constituents in percent by weight: 58-64% of copper, 0.5-3% of bismuth, 1-4% of aluminium, 0.5-1% of tin and the balance of zinc. The design principle of the lead-free brass alloy ingredients of the brass alloy bar disclosed by the invention avoids the addition of lead on the basis of keeping the cutability, the wear resistance and the antifrictionability of the original lead-containing tin bronze, suppressing the dissolution of lead by adding a silicon element and an aluminium element, and controlling the dissolution quantity of lead to be less than 0.01 mg/L. The principle is to form independent phases with dispersed distribution in a copper alloy by virtue of the added bismuth element, aluminium element and tin element, wherein the independent phases play a chip-breaking role during cutting, thus improving the cutting machinability of brass.
Description
Technical field
The present invention relates to alloy bar field, particularly relate to the unidirectional brass alloy rod cutting replacement lead element of a kind of bismuth aluminium tin, and the preparation method of this alloy bar.
Background technology
The cutting ability why copper alloy containing lead has had and properties of antifriction and wear resistance, mainly because lead exists with individual event at copper alloy, play good chip breaking effect when cutting; Under frictional wear environment, because the shearing resistance of lead is very low, the lead on copper alloy parts surface makes the frictional coefficient of copper alloy containing lead lower.So lead element more generally uses in brass alloys.But, but due to containing plumbous, easily cause hot-short during hot-work, can only process in the cold state, difficulty of processing is large, causes cost higher.And along with the raising gradually of people's environmental protection consciousness, lead-containing alloy rod, because it is to the pollution of environment, cannot meet the requirement of domestic and international high-end market.
Summary of the invention
For solving the problems of the technologies described above, the invention provides the unidirectional brass alloy rod cutting replacement lead element of a kind of bismuth aluminium tin, and the preparation method of this alloy bar.
For achieving the above object, technical scheme provided by the present invention is as follows:
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, comprises the component of following weight percentage: 58%-64% copper, 0.5%-3% bismuth, 1%-4% aluminium, 0.5%-1% tin, surplus zinc.
Preferably, be made up of the component of following weight percentage: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc.
Preferably, be made up of the component of following weight percentage: 60%-64% copper, 0.5%-1.5% bismuth, 1%-3% aluminium, 0.5%-1% tin, 1%-4% iron, surplus zinc.
Preferably, be made up of the component of following weight percentage: 62% bronze medal, 1% bismuth, 2% aluminium, 0.75% tin, 2.3% iron, surplus zinc.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin, comprises the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm;
Step 3: after soaking time 1.5h-2.5h, carries out 3-5 time composition inspection to the sample taken out in stove, determines that each element ratio is within pre-determined range;
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm;
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm;
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Further, also comprise step 7: surface treatment, will to extrude and the copper rod of having annealed out machines process, make its surface-brightening.
Further, also comprise step 8: flaw detection, the copper rod of light is detected a flaw by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Further, the inspection of composition described in step 3 adopts direct-reading spectrometer.
Adopt above-mentioned technique effect, beneficial effect of the present invention has:
The principle of design of this novel lead-free braze alloy components is keeping, on the former basis containing Redford alloy machinability and wear resistant friction reducing, stopping plumbous add-on, suppressing plumbous stripping, controlling lead release at below 0.01mg/L by adding Silicified breccias element.Principle utilizes to add the independent phase that Bi ﹑ aluminium and tin element form Dispersed precipitate in copper alloy, and these are single-phase plays chip breaking effect when cutting, thus improves the machinability of brass.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, comprises the component of following weight percentage: 58%-64% copper, 0.5%-3% bismuth, 1%-4% aluminium, 0.5%-1% tin, surplus zinc.
The unidirectional brass alloy rod replacing lead element that cuts of above-mentioned bismuth aluminium tin can be prepared by following method: be first placed in main frequency furnace according to proportioning by each component, is heated to 1200 degree of-1280 degree and melts rear insulation completely to 1230 degree of-1250 degree; After fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm; After soaking time 1.5h-2.5h, with German import Spike direct-reading spectrometer, 3-5 time composition inspection is carried out to the sample taken out in stove, determine that (namely the weight percentage of each component is 58%-64% copper to each element ratio within pre-determined range, 0.5%-3% bismuth, 1%-4% aluminium, 0.5%-1% tin, surplus zinc); Further insulation 1h-1.5h, is again warming up to 1250 degree of-1280 degree, and opens the vibrating device of main frequency furnace, and adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm; Then, with copper ingot milling machine, surface working is carried out to blank copper rod, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopts 1200 tons of single action extrusion machine extruding, and alloy pig Heating temperature is 300 degree of-350 degree, extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm; Finally carry out annealing, surface treatment, flaw detection and cutting, with box-annealing furnace, anneal is carried out to the copper rod after extruding, annealing temperature is 150 degree of-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of having annealed out machines process, make its surface-brightening, the copper rod of light is detected a flaw by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Prepared by employing aforesaid method, flaw detection qualification rate is more than 97%, and qualification rate is high.Plumbous solubility rate is at below 0.01mg/L, and machinability and wear resistance are all not less than existing leaded tin bronze alloys rod.
Embodiment 2
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, comprises the component of following weight percentage: 58%-63% copper, 1%-3% bismuth, 2%-4% aluminium, 0.5%-1% tin, surplus zinc.
The unidirectional brass alloy rod replacing lead element that cuts of above-mentioned bismuth aluminium tin can be prepared by following method: be first placed in main frequency furnace according to proportioning by each component, is heated to 1200 degree of-1250 degree and melts rear insulation completely to 1230 degree; After fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 22cm-25cm; After soaking time 2h-2.5h, with German import Spike direct-reading spectrometer, 3-5 time composition inspection is carried out to the sample taken out in stove, determine that (namely the weight percentage of each component is 58%-63% copper to each element ratio within pre-determined range, 1%-3% bismuth, 2%-4% aluminium, 0.5%-1% tin, surplus zinc); Further insulation 1h-1.5h, is again warming up to 1250 degree, and opens the vibrating device of main frequency furnace, and adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm; Then, with copper ingot milling machine, surface working is carried out to blank copper rod, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopts 1200 tons of single action extrusion machine extruding, and alloy pig Heating temperature is 300 degree of-350 degree, extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm; Finally carry out annealing, surface treatment, flaw detection and cutting, with box-annealing furnace, anneal is carried out to the copper rod after extruding, annealing temperature is 150 degree of-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of having annealed out machines process, make its surface-brightening, the copper rod of light is detected a flaw by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Prepared by employing aforesaid method, flaw detection qualification rate is more than 97%, and qualification rate is high.Plumbous solubility rate is at below 0.01mg/L, and machinability and wear resistance are all not less than existing leaded tin bronze alloys rod.(please supplementing machinability and wear resistance parameter) as far as possible
Embodiment 3
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, comprises the component of following weight percentage: 58% bronze medal, 1% bismuth, 2% aluminium, 0.5% tin, surplus zinc.Preparation method is as follows:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to about 1250 degree, is incubated to about 1240 degree after fusing completely; After fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, cladding thickness is about 20cm-25cm.After insulation 1.5h-2.5h, with German import Spike direct-reading spectrometer, 3-5 time composition inspection is carried out to the sample taken out in stove, determine that each element ratio is within pre-determined range.After further insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 2: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 3: anneal is carried out to the copper rod after extruding with box-annealing furnace, annealing temperature is 150 degree of-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of having annealed out machines process, make its surface-brightening, the copper rod of light is detected a flaw by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through alloy bar prepared by test which, flaw detection qualification rate is about 98%, and plumbous solubility rate is about 0.009mg/L, and obtained alloy bar machinability and wear resistance are slightly better than traditional leaded tin bronze alloys rod.
Embodiment 4
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, comprises the component of following weight percentage: 63% bronze medal, 3% bismuth, 4% aluminium, 1% tin, surplus zinc.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely.After fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm.After insulation 1.5h-2.5h, with German import Spike direct-reading spectrometer, 3-5 time composition inspection is carried out to the sample taken out in stove, determine that each element ratio is within pre-determined range.After further insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.With copper ingot milling machine, surface working is carried out to blank copper rod, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.Annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.Surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.The copper rod of light is detected a flaw by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through alloy bar prepared by test which, flaw detection qualification rate is about 98.2%, and plumbous solubility rate is about 0.009mg/L, and obtained alloy bar machinability and wear resistance are slightly better than or equal traditional leaded tin bronze alloys rod.
Embodiment 5
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, is made up of: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc the component of following weight percentage.Preparation method is as follows:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree after 1200 degree of-1250 degree melts completely.
Step 2: after fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm.
Step 3: after soaking time 2h-2.5h, carries out 3-5 time composition inspection with German import Spike direct-reading spectrometer to the sample taken out in stove, determines that each element ratio is within pre-determined range.
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 330 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through alloy bar prepared by test which, flaw detection qualification rate is about 98.5%, and plumbous solubility rate is about 0.0082mg/L, and obtained alloy bar machinability and wear resistance are obviously better than traditional leaded tin bronze alloys rod.
Embodiment 6
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, is made up of: 60%-64% copper, 0.5%-1.5% bismuth, 1%-3% aluminium, 0.5%-1% tin, 1%-4% iron, surplus zinc the component of following weight percentage.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin, comprises the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1250 degree after 1200 degree of-1280 degree melts completely.
Step 2: after fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-22cm.
Step 3: after soaking time 1.5h-2h, carries out 3-5 time composition inspection with German import Spike direct-reading spectrometer to the sample taken out in stove, determines that each element ratio is within pre-determined range.
Step 4: further after insulation 1h-1.5h, be again warming up to 1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through inspection, it is 97% that this alloy bar flaw detection qualification rate is greater than, and plumbous solubility rate is less than 0.01mg/L, and obtained alloy bar machinability and wear resistance are slightly better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 7
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, is made up of: 60% bronze medal, 0.5% bismuth, 1% aluminium, 0.5% tin, 1% iron, surplus zinc the component of following weight percentage.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin, comprises the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely.
Step 2: after fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm.
Step 3: after soaking time 1.5h-2.5h, carries out 3-5 time composition inspection with German import Spike direct-reading spectrometer to the sample taken out in stove, determines that each element ratio is within pre-determined range.
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through inspection, this alloy bar flaw detection qualification rate is about 97.2%, and plumbous solubility rate is about 0.0095mg/L, and obtained alloy bar machinability and wear resistance are slightly better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 8
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, is made up of: 64% bronze medal, 1.5% bismuth, 3% aluminium, 1% tin, 4% iron, surplus zinc the component of following weight percentage.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin, comprises the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely.
Step 2: after fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm.
Step 3: after soaking time 1.5h-2.5h, carries out 3-5 time composition inspection with German import Spike direct-reading spectrometer to the sample taken out in stove, determines that each element ratio is within pre-determined range.
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through inspection, this alloy bar flaw detection qualification rate is about 98.4%, and plumbous solubility rate is about 0.0093mg/L, and obtained alloy bar machinability and wear resistance are slightly better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 9
Bismuth aluminium tin is unidirectional cuts the brass alloy rod replacing lead element, is made up of: 62% bronze medal, 1% bismuth, 2% aluminium, 0.75% tin, 2.3% iron, surplus zinc the component of following weight percentage.
The above-mentioned preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin, comprises the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely.
Step 2: after fully being stirred by the alloy liquid melted completely with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is about 20cm-25cm.
Step 3: after soaking time 1.5h-2.5h, carries out 3-5 time composition inspection with German import Spike direct-reading spectrometer to the sample taken out in stove, determines that each element ratio is within pre-determined range.
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm.
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm.
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
Through inspection, this alloy bar flaw detection qualification rate is about 98.9%, and plumbous solubility rate is about 0.0089mg/L, and obtained alloy bar machinability and wear resistance are better than traditional leaded tin bronze alloys rod.
Table 1 cuts with bismuth aluminium tin is unidirectional the brass alloy rod performance replacing lead element
The above embodiment only have expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. cut with bismuth aluminium tin is unidirectional the brass alloy rod replacing lead element, it is characterized in that, be made up of the component of following weight percentage: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc.
2. cut with bismuth aluminium tin is unidirectional the brass alloy rod replacing lead element, it is characterized in that, be made up of the component of following weight percentage: 62% bronze medal, 1% bismuth, 2% aluminium, 0.75% tin, 2.3% iron, surplus zinc.
3. cut with bismuth aluminium tin is unidirectional the brass alloy rod replacing lead element, it is characterized in that, be made up of the component of following weight percentage: 63% bronze medal, 3% bismuth, 4% aluminium, 1% tin, surplus zinc.
4. cut with bismuth aluminium tin is unidirectional the brass alloy rod replacing lead element, it is characterized in that, be made up of the component of following weight percentage: 64% bronze medal, 1.5% bismuth, 3% aluminium, 1% tin, 4% iron, surplus zinc.
5. the preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin described in above-mentioned arbitrary claim, is characterized in that, comprise the following steps:
Step one: be placed in main frequency furnace by each component according to proportioning, is heated to be incubated to 1230 degree of-1250 degree after 1200 degree of-1280 degree melts completely;
Step 2: after the alloy liquid melted completely fully being stirred with graphite rod, cover high purity flaky graphite powder in the above and be oxidized to prevent it, thickness is 20cm-25cm;
Step 3: after soaking time 1.5h-2.5h, carries out 3-5 composition inspection to the sample taken out in stove, determines that each element ratio is within pre-determined range;
Step 4: further after insulation 1h-1.5h, be again warming up to 1250 degree of-1280 degree, and open the vibrating device of main frequency furnace, adopting horizontal continuous casting method to be cast as external diameter is 115mm, and length is the solid blanks alloy bar material of 650mm;
Step 5: surface working is carried out to blank copper rod with copper ingot milling machine, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, alloy pig Heating temperature is 300 degree of-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, after extruding, copper rod is diameter is 69.5mm-70.5mm, length 1450mm;
Step 6: annealing, carries out anneal with box-annealing furnace to the copper rod after extruding, and annealing temperature is 150 degree of-200 degree, and annealing time is 1.5 hours-2 hours.
6. the preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin described in the claims 5, is characterized in that, also comprise:
Step 7: surface treatment, will extrude and the copper rod of having annealed out machines process, makes its surface-brightening.
7. the preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin described in the claims 6, is characterized in that, also comprise:
Step 8: flaw detection, is detected a flaw the copper rod of light by eddy current flaw detec, the qualified product of flaw detection is cut into the finished product of length 1400mm.
8. the preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin described in the claims 5, it is characterized in that, the inspection of composition described in step 3 adopts direct-reading spectrometer.
9. the preparation method replacing the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin in the claims 6-7 described in arbitrary claim, it is characterized in that, the inspection of composition described in step 3 adopts direct-reading spectrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016352.1A CN103045903B (en) | 2013-01-16 | 2013-01-16 | Brass alloy bar replacing lead element by unidirectionally cutting bismuth, aluminium and tin and preparation for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016352.1A CN103045903B (en) | 2013-01-16 | 2013-01-16 | Brass alloy bar replacing lead element by unidirectionally cutting bismuth, aluminium and tin and preparation for same |
Publications (2)
| Publication Number | Publication Date |
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| CN103045903A CN103045903A (en) | 2013-04-17 |
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| CN103194642B (en) * | 2013-04-10 | 2015-04-08 | 苏州金仓合金新材料有限公司 | Novel lead-free copper-based alloy tube and preparation method thereof |
| CN104630553A (en) * | 2015-01-27 | 2015-05-20 | 苏州金仓合金新材料有限公司 | Environment-friendly lead-free novel alloy material pipe and preparation method thereof |
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| US6149739A (en) * | 1997-03-06 | 2000-11-21 | G & W Electric Company | Lead-free copper alloy |
| EP1502965A1 (en) * | 2003-08-01 | 2005-02-02 | Kovohute Celakovice, a.s. | Free cutting brass alloy |
| CN101386931A (en) * | 2008-10-21 | 2009-03-18 | 中铝洛阳铜业有限公司 | Environment friendly free-cutting leadless copper alloy material and processing technology |
| CN101876012A (en) * | 2009-12-09 | 2010-11-03 | 路达(厦门)工业有限公司 | Brass alloy with excellent stress corrosion resistance and manufacture method thereof |
| CN102828063A (en) * | 2012-09-18 | 2012-12-19 | 苏州天兼金属新材料有限公司 | Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof |
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| US6149739A (en) * | 1997-03-06 | 2000-11-21 | G & W Electric Company | Lead-free copper alloy |
| EP1502965A1 (en) * | 2003-08-01 | 2005-02-02 | Kovohute Celakovice, a.s. | Free cutting brass alloy |
| CN101386931A (en) * | 2008-10-21 | 2009-03-18 | 中铝洛阳铜业有限公司 | Environment friendly free-cutting leadless copper alloy material and processing technology |
| CN101876012A (en) * | 2009-12-09 | 2010-11-03 | 路达(厦门)工业有限公司 | Brass alloy with excellent stress corrosion resistance and manufacture method thereof |
| CN102828063A (en) * | 2012-09-18 | 2012-12-19 | 苏州天兼金属新材料有限公司 | Novel lead-free environment-friendly high-strength wear-resistant copper-base alloy bar and preparation method thereof |
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