CN103045903A - 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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- CN103045903A CN103045903A CN2013100163521A CN201310016352A CN103045903A CN 103045903 A CN103045903 A CN 103045903A CN 2013100163521 A CN2013100163521 A CN 2013100163521A CN 201310016352 A CN201310016352 A CN 201310016352A CN 103045903 A CN103045903 A CN 103045903A
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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 the alloy bar field, particularly relate to a kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin, and the preparation method of this alloy bar.
Background technology
Why copper alloy containing lead has good cutting ability and properties of antifriction and wear resistance, mainly is because lead exists with individual event at copper alloy, plays good chip breaking effect when cutting; Under the frictional wear environment, because plumbous shearing resistance is very low, the lead on copper alloy parts surface is so that the frictional coefficient of copper alloy containing lead is lower.So lead element more generally uses in brass alloys.But, but owing to containing lead, easily cause hot-shortly during hot-work, can only under cold conditions, process, difficulty of processing is large, causes cost higher.And along with the gradually raising of people's environmental protection consciousness, the lead-containing alloy rod is because its pollution to environment can't have been satisfied 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 a kind of brass alloy rod that replaces lead element with the unidirectional cutting 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:
The unidirectional cutting of a kind of usefulness bismuth aluminium tin replaces the brass alloy rod of 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, the component by following weight percentage forms: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc.
Preferably, the component by following weight percentage forms: 60%-64% copper, 0.5%-1.5% bismuth, 1%-3% aluminium, 0.5%-1% tin, 1%-4% iron, surplus zinc.
Preferably, the component by following weight percentage forms: 62% bronze medal, 1% bismuth, 2% aluminium, 0.75% tin, 2.3% iron, surplus zinc.
The above-mentioned unidirectional cutting of bismuth aluminium tin of using replaces the preparation method of the brass alloy rod of lead element, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1230 degree-1250 degree after the fusing fully;
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm;
Step 3: behind the soaking time 1.5h-2.5h, the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range;
Step 4: after further being incubated 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm;
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Further, also comprise step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, 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, direct-reading spectrometer is adopted in the check of composition described in the step 3.
Adopt above-mentioned technique effect, beneficial effect of the present invention has:
The principle of design of this novel lead-free brass alloys composition is to keep stopping plumbous add-on on the former basis that contains Redford alloy machinability and wear resistant friction reducing, suppressing plumbous stripping by adding silicon and aluminium element, and the control lead release is below 0.01mg/L.Principle is utilize to add De Bi ﹑ aluminium to form mutually independent that disperse distributes with tin element in copper alloy, and these are single-phase to play the chip breaking effect when cutting, thereby has improved the machinability of brass.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, 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, is not intended to limit the present invention.
Embodiment 1
The unidirectional cutting of a kind of usefulness bismuth aluminium tin replaces the brass alloy rod of 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.
Above-mentioned brass alloy rod with the unidirectional cutting replacement of bismuth aluminium tin lead element can prepare by following method: at first according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and melt rear the insulation to 1230 degree-1250 degree fully; After the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm; Behind the soaking time 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that (weight percentage that is each component is 58%-64% copper to each element ratio within pre-determined range, the 0.5%-3% bismuth, 1%-4% aluminium, 0.5%-1% tin, surplus zinc); Further insulation 1h-1.5h is warming up to 1250 degree-1280 degree again, 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 the copper ingot milling machine blank copper rod is carried out surface working, be processed as any surface finish diameter 110mm, the copper rod of length 600mm adopts 1200 tons of single action extrusion machine extruding, and the alloy pig Heating temperature is 300 degree-350 degree, extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm; Anneal at last, surface treatment, flaw detection and cutting, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of finishing out of annealing machines processing, 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.
The preparation of employing aforesaid method, flaw detection qualification rate is more than 97%, and qualification rate is high.Plumbous solubility rate is below 0.01mg/L, and machinability and wear resistance all are not less than existing leaded tin bronze alloys rod.
Embodiment 2
The unidirectional cutting of a kind of usefulness bismuth aluminium tin replaces the brass alloy rod of lead element, comprises the component of following weight percentage: 58%-63% copper, 1%-3% bismuth, 2%-4% aluminium, 0.5%-1% tin, surplus zinc.
Above-mentioned brass alloy rod with the unidirectional cutting replacement of bismuth aluminium tin lead element can prepare by following method: at first according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1250 degree and melt rear the insulation to 1230 degree fully; After the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 22cm-25cm; Behind the soaking time 2h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that (weight percentage that is each component is 58%-63% copper to each element ratio within pre-determined range, the 1%-3% bismuth, 2%-4% aluminium, 0.5%-1% tin, surplus zinc); Further insulation 1h-1.5h is warming up to 1250 degree again, 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 the copper ingot milling machine blank copper rod is carried out surface working, be processed as any surface finish diameter 110mm, the copper rod of length 600mm adopts 1200 tons of single action extrusion machine extruding, and the alloy pig Heating temperature is 300 degree-350 degree, extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm; Anneal at last, surface treatment, flaw detection and cutting, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of finishing out of annealing machines processing, 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.
The preparation of employing aforesaid method, flaw detection qualification rate is more than 97%, and qualification rate is high.Plumbous solubility rate is below 0.01mg/L, and machinability and wear resistance all are not less than existing leaded tin bronze alloys rod.(please replenishing machinability and wear resistance parameter) as far as possible
Embodiment 3
The unidirectional cutting of a kind of usefulness bismuth aluminium tin replaces the brass alloy rod of lead element, comprises the component of following weight percentage: 58% bronze medal, 1% bismuth, 2% aluminium, 0.5% tin, surplus zinc.The preparation method is as follows:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to about 1250 degree, about insulation is spent to 1240 after the fusing fully; After the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, cladding thickness is about 20cm-25cm.Behind the insulation 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.Further behind the insulation 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 3: the copper rod after pushing is carried out anneal with box-annealing furnace, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours, to extrude and the copper rod of finishing out of annealing machines processing, 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.
The alloy bar for preparing through testing this mode, flaw detection qualification rate is about 98%, and plumbous solubility rate is about 0.009mg/L, and the alloy bar machinability that makes and wear resistance slightly are better than traditional leaded tin bronze alloys rod.
Embodiment 4
The unidirectional cutting of a kind of usefulness bismuth aluminium tin replaces the brass alloy rod of 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 who replaces the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree fully after the fusing insulation to 1230 degree-1250 degree.After the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm.Behind the insulation 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.Further behind the insulation 1h-1.5h, again be warming up to 1250 degree-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 the copper ingot milling machine blank copper rod is carried out surface working, be processed as any surface finish diameter 110mm, the copper rod of length 600mm, adopt 1200 tons of single action extrusion machine extruding, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.Annealing is carried out anneal with box-annealing furnace to the copper rod after pushing, and annealing temperature is 150 degree-200 degree, and annealing time is 1.5 hours-2 hours.Surface treatment will extrude and the copper rod of finishing out of annealing machines processing, 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.
The alloy bar for preparing through testing this mode, flaw detection qualification rate is about 98.2%, and plumbous solubility rate is about 0.009mg/L, and the alloy bar machinability that makes and wear resistance slightly are better than or equal traditional leaded tin bronze alloys rod.
Embodiment 5
A kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is comprised of the component of following weight percentage: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc.The preparation method is as follows:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1250 degree and be incubated to 1230 degree after the fusing fully.
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm.
Step 3: behind the soaking time 2h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.
Step 4: after further being incubated 1h-1.5h, again be 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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 330 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
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.
The alloy bar for preparing through testing this mode, flaw detection qualification rate is about 98.5%, and plumbous solubility rate is about 0.0082mg/L, and the alloy bar machinability that makes and wear resistance obviously are better than traditional leaded tin bronze alloys rod.
Embodiment 6
A kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is comprised 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.
The above-mentioned unidirectional cutting of bismuth aluminium tin of using replaces the preparation method of the brass alloy rod of lead element, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1250 degree after the fusing fully.
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-22cm.
Step 3: behind the soaking time 1.5h-2h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.
Step 4: after further being incubated 1h-1.5h, again be 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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
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.
Through check, this alloy bar flaw detection qualification rate is greater than being 97%, and plumbous solubility rate is less than 0.01mg/L, and the alloy bar machinability that makes and wear resistance slightly are better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 7
A kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is comprised of the component of following weight percentage: 60% bronze medal, 0.5% bismuth, 1% aluminium, 0.5% tin, 1% iron, surplus zinc.
The above-mentioned unidirectional cutting of bismuth aluminium tin of using replaces the preparation method of the brass alloy rod of lead element, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1230 degree-1250 degree after the fusing fully.
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm.
Step 3: behind the soaking time 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.
Step 4: after further being incubated 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
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.
Through check, this alloy bar flaw detection qualification rate is about 97.2%, and plumbous solubility rate is about 0.0095mg/L, and the alloy bar machinability that makes and wear resistance slightly are better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 8
A kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is comprised of the component of following weight percentage: 64% bronze medal, 1.5% bismuth, 3% aluminium, 1% tin, 4% iron, surplus zinc.
The above-mentioned unidirectional cutting of bismuth aluminium tin of using replaces the preparation method of the brass alloy rod of lead element, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1230 degree-1250 degree after the fusing fully.
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm.
Step 3: behind the soaking time 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.
Step 4: after further being incubated 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
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.
Through check, this alloy bar flaw detection qualification rate is about 98.4%, and plumbous solubility rate is about 0.0093mg/L, and the alloy bar machinability that makes and wear resistance slightly are better than or are equal to traditional leaded tin bronze alloys rod.
Embodiment 9
A kind of brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is comprised 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 unidirectional cutting of bismuth aluminium tin of using replaces the preparation method of the brass alloy rod of lead element, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1230 degree-1250 degree after the fusing fully.
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm.
Step 3: behind the soaking time 1.5h-2.5h, with German import Spike direct-reading spectrometer the sample that takes out is carried out 3-5 time composition check in stove, determine that each element ratio is within pre-determined range.
Step 4: after further being incubated 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm.
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
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.
Through check, this alloy bar flaw detection qualification rate is about 98.9%, and plumbous solubility rate is about 0.0089mg/L, and the alloy bar machinability that makes and wear resistance are better than traditional leaded tin bronze alloys rod.
Table 1 replaces the brass alloy rod performance of lead element with the unidirectional cutting of bismuth aluminium tin
The above embodiment has only expressed embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.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 (8)
1. a brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin is characterized in that, comprises the component of following weight percentage: 58%-64% copper, 0.5%-3% bismuth, 1%-4% aluminium, 0.5%-1% tin, surplus zinc.
2. the brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin according to claim 1 is characterized in that, is comprised of the component of following weight percentage: 61% bronze medal, 2% bismuth, 3% aluminium, 0.8% tin, surplus zinc.
3. the brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin according to claim 1 is characterized in that, is comprised 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.
4. the brass alloy rod that replaces lead element with the unidirectional cutting of bismuth aluminium tin according to claim 1 is characterized in that, is comprised of the component of following weight percentage: 62% bronze medal, 1% bismuth, 2% aluminium, 0.75% tin, 2.3% iron, surplus zinc.
5. the described preparation method who replaces the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin of above-mentioned arbitrary claim is characterized in that, may further comprise the steps:
Step 1: according to proportioning each component is placed in the main frequency furnace, be heated to 1200 degree-1280 degree and be incubated to 1230 degree-1250 degree after the fusing fully;
Step 2: after the alloy liquid that will melt fully with graphite rod fully stirs, cover in the above high purity flaky graphite powder to prevent its oxidation, thickness is about 20cm-25cm;
Step 3: behind the soaking time 1.5h-2.5h, the sample that takes out is carried out 3-5 composition check in stove, determine that each element ratio is within pre-determined range;
Step 4: after further being incubated 1h-1.5h, again be warming up to 1250 degree-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: the blank copper rod is carried out surface working with the 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, the alloy pig Heating temperature is 300 degree-350 degree, and extrusion temperature is 450 degree, extrusion speed V=15mm/s, copper rod is that diameter is 69.5mm-70.5mm after the extruding, length 1450mm;
Step 6: annealing, with box-annealing furnace the copper rod after pushing is carried out anneal, annealing temperature is 150 degree-200 degree, annealing time is 1.5 hours-2 hours.
6. the claims 5 described preparation methods that replace the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin is characterized in that, also comprise:
Step 7: surface treatment, will extrude and the copper rod of finishing out of annealing machines processing, make its surface-brightening.
7. the claims 6 described preparation methods that replace the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin is characterized in that, 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.
8. the described preparation method who replaces the brass alloy rod of lead element with the unidirectional cutting of bismuth aluminium tin of arbitrary claim among the claims 5-7 is characterized in that, direct-reading spectrometer is adopted in the check of composition described in the step 3.
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| 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 |
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| 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 |
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| WO2014166022A1 (en) * | 2013-04-10 | 2014-10-16 | 苏州金仓合金新材料有限公司 | New lead-free copper-based alloy pipe and preparation method therefor |
| WO2016119093A1 (en) * | 2015-01-27 | 2016-08-04 | 苏州金仓合金新材料有限公司 | Environmentally friendly lead-free novel alloy material pipe and preparation method therefor |
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| 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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| EP1502965A1 (en) * | 2003-08-01 | 2005-02-02 | Kovohute Celakovice, a.s. | Free cutting brass alloy |
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| CN103045903B (en) | 2015-04-22 |
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