CN103602853B - A kind of low lead extrudes round brass rod and production method thereof - Google Patents
A kind of low lead extrudes round brass rod and production method thereof Download PDFInfo
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- CN103602853B CN103602853B CN201310562188.4A CN201310562188A CN103602853B CN 103602853 B CN103602853 B CN 103602853B CN 201310562188 A CN201310562188 A CN 201310562188A CN 103602853 B CN103602853 B CN 103602853B
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Abstract
The invention provides a kind of low lead and extrude round brass rod and production method thereof; comprise by the electrolytic copper material of 45 ~ 50%, 19 ~ 29% low lead ring protects foundry returns, the bismuth of 0.8 ~ 1.0%, zinc ingot metal, the magnesium of 0.01 ~ 0.02%, the tin raw material founding of 0.01 ~ 0.02% of 25 ~ 30% extrude the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod, by formula of the present invention and method can prepare have excellent polishing plating, machining, impact briquetting performance low lead ring protect and extrude round brass rod.
Description
Technical field
The present invention relates to a kind of water heating bathroom component and device copper alloy materials, particularly the low lead of one extrudes round brass rod and production method thereof.
Background technology
Leaded brass has the features such as excellent cold and hot working performance, fabulous cutting ability and self-lubricating, can meet the techniques such as the casting of different shape component, forging, machining, polishing, therefore leaded brass is widely used in the industries such as electronics telecommunication, household electrical appliances, space flight and aviation, automobile, five metals decoration, shipbuilding and bathroom hot-water heating.It is poor that existing low lead ring guarantor draws casting round brass rod surface quality, not easily polishing electric degree, difficulty of processing is large, cracking is easy in machining, more easy to crack in impact briquetting, therefore most of manufacturer has to continue to use leaded round brass rod to produce complex parts, and this lead and yellow-collation copper rod has good cutting ability, is applied to all trades and professions such as hardware, bike, pen processed, electronics, battery, household electrical appliance, communication, clock and watch.But lead is to one of relatively large heavy metal of harm, and lead enters environment and not easily removes later, and accumulate in the environment, very easily certain toxic action is produced to biological and human body, particularly cause irreversible damage to the cranial nerve of children and renal function, serious meeting causes blood lead, brain lead poisoning, backwardness, dementia, the adverse consequences such as active.Therefore now both at home and abroad all in the Application and Development being devoted to unleaded copper rod.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of low lead and extrudes round brass rod and production method thereof, by formula of the present invention and method can prepare have excellent polishing plating, machining, impact briquetting performance low lead ring protect and extrude round brass rod.
For solving this technical problem; the present invention takes following scheme: a kind of low lead extrudes round brass rod, comprises the raw material composition of following weight per-cent: electrolytic copper material 45 ~ 50%, low lead ring protect foundry returns 19 ~ 29%, bismuth 0.8 ~ 1.0%, zinc ingot metal 25 ~ 30%, magnesium 0.01 ~ 0.02%, tin 0.01 ~ 0.02%.
Further improvement: above-mentioned each raw material is all dry raw material.
Further improvement: it is that low lead ring protects brass waste material that described low lead ring protects foundry returns.
Propose based on same design the present invention a kind of method that low lead extrudes round brass rod, it is characterized in that: comprise founding and extrude the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod:
The step that described founding extrudes solid BRASS FORGE comprises:
1), by the electrolytic copper material accounting for brass raw material 45 ~ 50% drop in power frequency copper smelting furnace, the industry that goes into operation voltage high pressure 380V, then adds 0.1% environmental protection refining slag-cleaning agent, is warming up to brass raw material and dissolves completely, obtain copper liquid in power frequency copper smelting furnace;
2), by the low lead ring accounting for brass raw material 19 ~ 29% protecting brass waste material divides 1 ~ 2 batch to drop in above-mentioned copper liquid in proportion, stirs in batches, and Loss reducing, improves melting efficiency;
3), then added successively in copper liquid by the zinc ingot metal accounting for brass raw material 25 ~ 30%, continuously stirring melts completely to raw material;
4), then in power frequency copper smelting furnace, add the bismuth accounting for brass raw material 0.8 ~ 1.0% again, be stirred to fusing;
5), in power frequency copper smelting furnace, add the magnesium accounting for brass raw material 0.01 ~ 0.02% and the tin accounting for brass raw material 0.01 ~ 0.02%, press-in copper liquid is inner and stirring makes it fusing;
6), again in power frequency copper smelting furnace, add 0.1% environmental protection refining slag-cleaning agent, press-in copper liquid is inner, and continuously stirring evenly makes it fusing and with the low pressure refining 5 ~ 10min of 220 ~ 250V;
7), the chemical composition of stokehold sampling and measuring copper liquid, after sampling, power frequency copper smelting furnace suspends industrial voltage high pressure 380V, and the industry that goes into operation voltage low pressure 180 ~ 220V, carries out slag hitting;
8), according to composition test result, readjust the composition of copper liquid, fill into raw material, reopen industrial voltage high pressure 380V, be stirred to raw material and melt completely, be then warming up to complete flame twice, temperature is 1060 ~ 1100 DEG C;
9), change the industry low pressure 180 ~ 220V that goes into operation, temperature is 1020 ~ 1040 DEG C and leaves standstill 3 ~ 5 minutes, then carries out slag hitting, and slag is beaten totally and poured in holding furnace by copper water;
10), by crystallizer be installed on holding furnace, during installation, with drawing bar to center, to ensure and tractor level;
11), finally start to draw casting with tractor, copper water temp in holding furnace should be raised to little flame before starting to draw casting, industry voltage is 250V ~ 300V voltage, give in water jacket simultaneously and send into a small amount of water, the water yield is 2.2L/s, preparation work starts to draw rod after carrying out, when just having started to draw rod, tractor speed slows down to 20 ~ 40mm/min, , until draw rod success, after drawing rod success, voltage is dropped to 180V ~ 240V, adjustment tractor speed is adjusted to 40 ~ 50mm/min, and open cooling water switch, the water yield is 4.0L/s, draw excellent length and reach speed 50 ~ 70mm/min that pulling rate can be adjusted to processing requirement by more than a meter, after drawing rod and be normal, tractor is synchronously sawed the length adjusted to and need sawing, long copper rod is sawed the short copper ingot that short one-tenth can be used for extruding,
The step that described BRASS FORGE is squeezed into copper rod is contained in by above-mentioned short copper ingot in squeezing device and utilizes squeezing device to apply external force to short copper ingot to make it to flow out from the extrusion die orifice of squeezing device, thus obtain a kind of plastic processing method of required section form and size.
Further improvement: the temperature of described flame is 1060 ~ 1100 DEG C.
Further improvement: described squeezing device comprises container, overflow mould and extrusion axis, there is in described container the extruded hole that accommodatingly can be extruded goods, described extrusion axis is located at one end of extruded hole, described overflow mould is fixedly arranged on container that one end away from extrusion axis, described overflow mould is provided with and can be extruded the extrusion die orifice of product extrusion, and the free end of described extrusion axis also can advance simultaneously or retreat by pushing drive unit with pushing drive unit phase interlock.
Further improvement: the front end being positioned at extrusion axis in the extruded hole of described container is also provided with extruding pad.
By adopting preceding solution, the invention has the beneficial effects as follows: the low lead ring adopting the specific formula and processing technology of the present invention to produce is protected and extruded round brass rod, its physicals and surface quality are all good, hot-water heating industry can be reduced electroplate in polishing, mechanical workout, waste product in impact briquetting, improve yield rate about 10% ~ 20%, solve hot-water heating industry for many years because low lead ring guarantor draws the problem that casting rod physicals is poor and yield rate is low, bismuth metal is adopted to replace plumbous, improve the machinability of round brass rod, the strict order of addition controlling various raw material in production process, avoid the scaling loss of each material effective component, reduce raw materials cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention squeezing device.
Embodiment
Now the present invention is further described for combination and specific embodiment.
Embodiment one:
The present invention discloses a kind of low lead and extrudes round brass rod, comprises the raw material composition of following weight per-cent: electrolytic copper material 45%, low lead ring protect foundry returns 19%, bismuth 0.8%, zinc ingot metal 25%, magnesium 0.01%, tin 0.01%.Above-mentioned each raw material is all dried feed.
Above-mentioned raw materials proportioning produces the production method that low lead extrudes round brass rod: comprise founding and extrude the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod:
The step that described founding extrudes solid BRASS FORGE comprises:
1), the electrolytic copper material accounting for brass raw material 45% is dropped in power frequency copper smelting furnace, the industry that goes into operation voltage high pressure 380V, then add in power frequency copper smelting furnace 0.1% environmental protection refining slag-cleaning agent (environmental protection scarfing cinder refining agent be herein Shanghai Wang Nan metal flux company limited produce can directly purchase this example do not comment carefully state), be warming up to brass raw material to dissolve completely, obtain copper liquid;
2), by the low lead ring accounting for brass raw material 19% protecting brass waste material divides 1 ~ 2 batch to drop in above-mentioned copper liquid in proportion, stirs in batches, and Loss reducing, improves melting efficiency;
3), then added successively in copper liquid by the zinc ingot metal accounting for brass raw material 25%, continuously stirring melts completely to raw material;
4), then in power frequency copper smelting furnace, add the bismuth accounting for brass raw material 0.8% again, be stirred to fusing;
5), in power frequency copper smelting furnace, add the magnesium accounting for brass raw material 0.01% and the tin accounting for brass raw material 0.01%, press-in copper liquid is inner and stirring makes it fusing;
6), again in power frequency copper smelting furnace, add 0.1% environmental protection refining slag-cleaning agent, press-in copper liquid is inner, and continuously stirring evenly makes it fusing and with the low pressure refining 5min of 220V;
7), the chemical composition of stokehold sampling and measuring copper liquid, after sampling, power frequency copper smelting furnace suspends industrial voltage high pressure 380V, and the industry that goes into operation voltage low pressure 180V, carries out slag hitting;
8), according to composition test result, readjust the composition of copper liquid, fill into raw material, reopen industrial voltage high pressure 380V, be stirred to raw material and melt completely, be then warming up to complete flame twice, temperature is 1060 DEG C;
9), change the industry low pressure 180 that goes into operation, temperature is 1020 DEG C and leaves standstill 3 minutes, then carries out slag hitting, and slag is beaten totally and poured in holding furnace by copper water;
10), by crystallizer be installed on holding furnace, during installation, with drawing bar to center, to ensure and tractor level;
11), finally start to draw casting with tractor, copper water temp in holding furnace should be raised to little flame before starting to draw casting, industry voltage is 250V voltage, give in water jacket simultaneously and send into a small amount of water, the water yield is 2.2L/s, preparation work starts to draw rod after carrying out, when just having started to draw rod, tractor speed slows down to 20mm/min, , until draw rod success, after drawing rod success, voltage is dropped to 180VV, adjustment tractor speed is adjusted to 40mm/min, and open cooling water switch, the water yield is 4.0L/s, draw excellent length and reach the speed 50mm/min that pulling rate can be adjusted to processing requirement by more than a meter, after drawing rod and be normal, tractor is synchronously sawed the length adjusted to and need sawing, long copper rod is sawed the short copper ingot that short one-tenth can be used for extruding,
The step that described BRASS FORGE is squeezed into copper rod is contained in by above-mentioned short copper ingot in squeezing device and utilizes squeezing device to apply external force to short copper ingot to make it to flow out from the extrusion die orifice of squeezing device, thus obtain a kind of plastic processing method of required section form and size.
As Fig. 1, described squeezing device comprises container 1, overflow mould 2 and extrusion axis 3, there is in described container 1 extruded hole 11 that accommodatingly can be extruded goods, described extrusion axis 3 is located at one end of extruded hole 11, described overflow mould 2 is fixedly arranged on container 1 that one end away from extrusion axis 3, described overflow mould 2 is provided with and can be extruded the extrusion die orifice 21 of product extrusion, the front end being positioned at extrusion axis in the extruded hole of described container 1 is also provided with extruding pad 4, and the free end of described extrusion axis also can advance simultaneously or retreat by pushing drive unit with pushing drive unit phase interlock.
The step tool that BRASS FORGE is squeezed into copper rod has the following advantages:
(1) brass alloys can improve the deformability of metal by extruding.Metal is in strong three-dimensional compressive stress state in crimp district, can give full play to its plasticity, obtains aximal deformation value.
(2) overall quality of extruded product is high.Crimp can improve the tissue of metallic substance, improve its mechanical property, particularly some are had to the copper alloy of extrusion effect, longitudinal direction (direction of extrusion) mechanical property of its extruded product makes finished product copper rod have good physicals far above the like product that other working methods are produced, specific as follows:
1, tensile strength is high: tensile strength reaches 365Rm/MPa, meets GB/T13808 ~ 92 standard.
2, elongation is good: elongation reaches 20%, meets GB/T13808 ~ 92 standard.
The low lead ring adopting the specific formula and processing technology of the present invention to produce is protected and is extruded round brass rod, its physicals and surface quality are all good, hot-water heating industry can be reduced electroplate in polishing, mechanical workout, waste product in impact briquetting, improve yield rate about 10% ~ 20%, solve hot-water heating industry for many years because low lead ring guarantor draws the problem that casting rod physicals is poor and yield rate is low, bismuth metal is adopted to replace plumbous, improve the machinability of round brass rod, the strict order of addition controlling various raw material in production process, avoid the scaling loss of each material effective component, reduce raw materials cost.
Embodiment two:
The embodiment of the present invention two discloses a kind of low lead and extrudes round brass rod, comprises the raw material composition of following weight per-cent: electrolytic copper material 48%, low lead ring protect foundry returns 25%, bismuth 0.9%, zinc ingot metal 28%, magnesium 0.02%, tin 0.02%.Above-mentioned each raw material is all dried feed.
Produce by above-mentioned proportioning raw materials the production method that low lead extrudes round brass rod, comprise founding and extrude the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod:
The step that described founding extrudes solid BRASS FORGE comprises:
1), the electrolytic copper material accounting for brass raw material 48% is dropped in power frequency copper smelting furnace, the industry that goes into operation voltage high pressure 380V, then add in power frequency copper smelting furnace 0.1% environmental protection refining slag-cleaning agent (environmental protection scarfing cinder refining agent be herein Shanghai Wang Nan metal flux company limited produce can directly purchase the embodiment of the present invention do not comment carefully state), be warming up to brass raw material to dissolve completely, obtain copper liquid;
2), by the low lead ring accounting for brass raw material 25% protecting brass waste material divides 1 ~ 2 batch to drop in above-mentioned copper liquid in proportion, stirs in batches, and Loss reducing, improves melting efficiency;
3), then added successively in copper liquid by the zinc ingot metal accounting for brass raw material 28%, continuously stirring melts completely to raw material;
4), then in power frequency copper smelting furnace, add the bismuth accounting for brass raw material 0.9% again, be stirred to fusing;
5), in power frequency copper smelting furnace, add the magnesium accounting for brass raw material 0.02% and the tin accounting for brass raw material 0.02%, press-in copper liquid is inner and stirring makes it fusing;
6), again in power frequency copper smelting furnace, add 0.1% environmental protection refining slag-cleaning agent, press-in copper liquid is inner, and continuously stirring evenly makes it fusing and with the low pressure refining 8min of 235V;
7), the chemical composition of stokehold sampling and measuring copper liquid, after sampling, power frequency copper smelting furnace suspends industrial voltage high pressure 380V, and the industry that goes into operation voltage low pressure 200V, carries out slag hitting;
8), according to composition test result, readjust the composition of copper liquid, fill into raw material, reopen industrial voltage high pressure 380V, be stirred to raw material and melt completely, be then warming up to complete flame twice, temperature is 1080 DEG C;
9), change the industry low pressure 200V that goes into operation, temperature is 1030 DEG C and leaves standstill 4 minutes, then carries out slag hitting, and slag is beaten totally and poured in holding furnace by copper water;
10), by crystallizer be installed on holding furnace, during installation, with drawing bar to center, to ensure and tractor level;
11), finally start to draw casting with tractor, copper water temp in holding furnace should be raised to little flame before starting to draw casting, industry voltage is 280V voltage, give in water jacket simultaneously and send into a small amount of water, the water yield is 2.2L/s, preparation work starts to draw rod after carrying out, when just having started to draw rod, tractor speed slows down to 30mm/min, , until draw rod success, after drawing rod success, voltage is dropped to 220V, adjustment tractor speed is adjusted to 50mm/min, and open cooling water switch, the water yield is 4.0L/s, draw excellent length and reach the speed 60mm/min that pulling rate can be adjusted to processing requirement by more than a meter, after drawing rod and be normal, tractor is synchronously sawed the length adjusted to and need sawing, long copper rod is sawed the short copper ingot that short one-tenth can be used for extruding,
The step that described BRASS FORGE is squeezed into copper rod is contained in by above-mentioned short copper in squeezing device and utilizes squeezing device to apply external force to short copper ingot to make it to flow out from the extrusion die orifice of squeezing device, thus obtain a kind of plastic processing method of required section form and size.Here squeezing device adopts squeezing device disclosed in enforcement one.
Embodiment three:
The embodiment of the present invention two discloses a kind of low lead and extrudes round brass rod, comprises the raw material composition of following weight per-cent: electrolytic copper material 50%, low lead ring protect foundry returns 29%, bismuth 1.0%, zinc ingot metal 30%, magnesium 0.02%, tin 0.02%.Above-mentioned each raw material is all dried feed.
Above-mentioned raw materials proportioning produces the production method that low lead extrudes round brass rod, comprises founding and extrudes the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod:
The step that described founding extrudes solid BRASS FORGE comprises:
1), the electrolytic copper material accounting for brass raw material 50% is dropped in power frequency copper smelting furnace, the industry that goes into operation voltage high pressure 380V, then in power frequency copper smelting furnace, adding 0.1% environmental protection refining slag-cleaning agent, (environmental protection scarfing cinder refining agent is herein that Shanghai Wang Nan metal flux company limited produces and directly can adopt sight, belong to well known materials, the embodiment of the present invention does not describe in detail), be warming up to brass raw material to dissolve completely, obtain copper liquid;
2), by the low lead ring accounting for brass raw material 29% protecting brass waste material divides 1 ~ 2 batch to drop in above-mentioned copper liquid in proportion, stirs in batches, and Loss reducing, improves melting efficiency;
3), then added successively in copper liquid by the zinc ingot metal accounting for brass raw material 30%, continuously stirring melts completely to raw material;
4), then in power frequency copper smelting furnace, add the bismuth accounting for brass raw material 1.0% again, be stirred to fusing;
5), in power frequency copper smelting furnace, add the magnesium accounting for brass raw material 0.02% and the tin accounting for brass raw material 0.02%, press-in copper liquid is inner and stirring makes it fusing;
6), again in power frequency copper smelting furnace, add 0.1% environmental protection refining slag-cleaning agent, press-in copper liquid is inner, and continuously stirring evenly makes it fusing and with the low pressure refining 10min of 250V;
7), the chemical composition of stokehold sampling and measuring copper liquid, after sampling, power frequency copper smelting furnace suspends industrial voltage high pressure 380V, and the industry that goes into operation voltage low pressure 220V, carries out slag hitting;
8), according to composition test result, readjust the composition of copper liquid, fill into raw material, reopen industrial voltage high pressure 380V, be stirred to raw material and melt completely, be then warming up to complete flame twice, temperature is 1100 DEG C;
9), change the industry low pressure 220V that goes into operation, temperature is 1040 DEG C and leaves standstill 5 minutes, then carries out slag hitting, and slag is beaten totally and poured in holding furnace by copper water;
10), by crystallizer be installed on holding furnace, during installation, with drawing bar to center, to ensure and tractor level;
11), finally start to draw casting with tractor, copper water temp in holding furnace should be raised to little flame before starting to draw casting, industry voltage is 300V voltage, give in water jacket simultaneously and send into a small amount of water, the water yield is 2.2L/s, preparation work starts to draw rod after carrying out, when just having started to draw rod, tractor speed slows down to 40mm/min, , until draw rod success, after drawing rod success, voltage is dropped to 240V, adjustment tractor speed is adjusted to 50mm/min, and open cooling water switch, the water yield is 4.0L/s, draw excellent length and reach the speed 70mm/min that pulling rate can be adjusted to processing requirement by more than a meter, after drawing rod and be normal, tractor is synchronously sawed the length adjusted to and need sawing, long copper rod is sawed the short copper ingot that short one-tenth can be used for extruding,
The step that described BRASS FORGE is squeezed into copper rod is contained in by above-mentioned short copper in squeezing device and utilizes squeezing device to apply external force to short copper ingot to make it to flow out from the extrusion die orifice of squeezing device, thus obtain a kind of plastic processing method of required section form and size.Here squeezing device adopts squeezing device disclosed in enforcement one.
Above, be only the embodiment utilizing this origination techniques content, the modification that any those skilled in the art use this creation to do, change, all belong to the scope of the claims that this creation is advocated, and be not limited to those disclosed embodiments.
Claims (4)
1. low lead extrudes a method for round brass rod, it is characterized in that: comprise founding and extrude the step of solid BRASS FORGE and BRASS FORGE be squeezed into the step of copper rod:
The step that described founding extrudes solid BRASS FORGE comprises:
1), by the electrolytic copper material accounting for brass raw material 45 ~ 50% drop in power frequency copper smelting furnace, the industry that goes into operation voltage high pressure 380V, then adds 0.1% environmental protection refining slag-cleaning agent, is warming up to brass raw material and dissolves completely, obtain copper liquid in power frequency copper smelting furnace;
2), by the low lead ring accounting for brass raw material 19 ~ 29% protecting brass waste material divides 1 ~ 2 batch to drop in above-mentioned copper liquid in proportion, stirs in batches, and Loss reducing, improves melting efficiency;
3), then added successively in copper liquid by the zinc ingot metal accounting for brass raw material 25 ~ 30%, continuously stirring melts completely to raw material;
4), then in power frequency copper smelting furnace, add the bismuth accounting for brass raw material 0.8 ~ 1.0% again, be stirred to fusing;
5), in power frequency copper smelting furnace, add the magnesium accounting for brass raw material 0.01 ~ 0.02% and the tin accounting for brass raw material 0.01 ~ 0.02%, press-in copper liquid is inner and stirring makes it fusing;
6), again in power frequency copper smelting furnace, add 0.1% environmental protection refining slag-cleaning agent, press-in copper liquid is inner, and continuously stirring evenly makes it fusing and with the low pressure refining 5 ~ 10min of 220 ~ 250V;
7), the chemical composition of stokehold sampling and measuring copper liquid, after sampling, power frequency copper smelting furnace suspends industrial voltage high pressure 380V, and the industry that goes into operation voltage low pressure 180 ~ 220V, carries out slag hitting;
8), according to composition test result, readjust the composition of copper liquid, fill into raw material, reopen industrial voltage high pressure 380V, be stirred to raw material and melt completely, be then warming up to complete flame twice, temperature is 1060 ~ 1100 DEG C;
9), change the industry low pressure 180 ~ 220V that goes into operation, temperature is 1020 ~ 1040 DEG C and leaves standstill 3 ~ 5 minutes, then carries out slag hitting, and slag is beaten totally and poured in holding furnace by copper water;
10), by crystallizer be installed on holding furnace, during installation, with drawing bar to center, to ensure and tractor level;
11), finally start to draw casting with tractor, copper water temp in holding furnace should be raised to little flame before starting to draw casting, industry voltage is 250V ~ 300V voltage, give in water jacket simultaneously and send into a small amount of water, the water yield is 2.2L/s, preparation work starts to draw rod after carrying out, when just having started to draw rod, tractor speed slows down to 20 ~ 40mm/min, until draw rod success, after drawing rod success, voltage is dropped to 180V ~ 240V, adjustment tractor speed is adjusted to 40 ~ 50mm/min, and open cooling water switch, the water yield is 4.0L/s, draw excellent length and reach speed 50 ~ 70mm/min that pulling rate can be adjusted to processing requirement by more than a meter, after drawing rod and be normal, tractor is synchronously sawed the length adjusted to and need sawing, long copper rod is sawed the short copper ingot that short one-tenth can be used for extruding,
The step that described BRASS FORGE is squeezed into copper rod is contained in by above-mentioned short copper ingot in squeezing device and utilizes squeezing device to apply external force to short copper ingot to make it to flow out from the extrusion die orifice of squeezing device, thus obtain a kind of plastic processing method of required section form and size.
2. low lead according to claim 1 extrudes the method for round brass rod, it is characterized in that: the temperature of described flame is 1060 ~ 1100 DEG C.
3. low lead according to claim 1 extrudes the method for round brass rod, it is characterized in that: described squeezing device comprises container, overflow mould and extrusion axis, there is in described container the extruded hole that accommodatingly can be extruded goods, described extrusion axis is located at one end of extruded hole, described overflow mould is fixedly arranged on container that one end away from extrusion axis, described overflow mould is provided with and can be extruded the extrusion die orifice of product extrusion, and the free end of described extrusion axis also can advance simultaneously or retreat by pushing drive unit with pushing drive unit phase interlock.
4. low lead according to claim 3 extrudes the method for round brass rod, it is characterized in that: the front end being positioned at extrusion axis in the extruded hole of described container is also provided with extruding pad.
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| CN104772358B (en) * | 2015-04-28 | 2017-03-29 | 哈尔滨理工大学 | Metal replaces extrusion molding apparatus and method |
| CN106119599A (en) * | 2016-06-23 | 2016-11-16 | 龙岩市鸿航金属科技有限公司 | Lead-free free-cutting draws the production method of casting rod |
| CN109022902B (en) * | 2018-10-24 | 2019-07-09 | 玉环澳龙阀门股份有限公司 | A kind of anti-dezincification environmental protection copper rod of low lead and preparation process |
| CN113355531B (en) * | 2021-05-28 | 2022-11-04 | 河南豫光金铅股份有限公司 | Production method for directly smelting brass raw material into copper anode plate |
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| US10351933B2 (en) * | 2012-02-01 | 2019-07-16 | Toto Ltd. | Brass with excellent corrosion resistance |
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| CN102477498A (en) * | 2010-11-26 | 2012-05-30 | 摩登岛股份有限公司 | Easily-cut environment-friendly brass alloy |
| CN102653828A (en) * | 2011-03-03 | 2012-09-05 | 中宇建材集团有限公司 | Preparation method of low-lead environment-friendly grade-A copper ingot |
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