CN105821357A - Production process for lead brass bars - Google Patents
Production process for lead brass bars Download PDFInfo
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- CN105821357A CN105821357A CN201610325744.XA CN201610325744A CN105821357A CN 105821357 A CN105821357 A CN 105821357A CN 201610325744 A CN201610325744 A CN 201610325744A CN 105821357 A CN105821357 A CN 105821357A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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- Crystallography & Structural Chemistry (AREA)
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- Metal Extraction Processes (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention provides a production process for lead brass bars. According to the production process, the lead brass bars are obtained through the steps of ingot casting, extrusion, jiggering and skin planing, continuous drawing and continuous annealing, and united drawing. Recrystallized grains of the lead brass bars obtained through the production process are fine, alpha phases are divided into relatively isolated small massive structures by numerous fine granular beta phases, and the cutting performance of the lead brass bars is improved.
Description
Technical field
The present invention relates to the production technology of a kind of ledrite bar.
Background technology
Why ledrite has excellent cutting ability, is primarily due to Pb element in the tissue presented in soft point, has cut off the seriality of brass base so that it is easy that ledrite bar adds chip breaking in man-hour on lathe.
Ф 2.0～6.0mm small dimension ledrite rod material production technology process: ingot casting extruding disk draws well furnace pickling associating drawing, although the ledrite bar that this technique produces can meet the processing request of middle low speed automatic lathe, but it is as machine cut processing constantly to develop to automatization, high speed and precise treatment direction, the machinability of material is proposed higher requirement, at some special manufacture field, the ledrite bar that this technique produces has been not suitable with at a high speed, the processing request of fine turning lathe.
Main cause be ledrite well furnace temperature range be 500～600 DEG C, annealing temperature retention time is generally at 120～360 minutes, owing to annealing temperature is high, temperature retention time is long, recrystallized structure is thick, and α phase and β phase are block distribution, are interconnected between α phase, owing to α phase matter is soft, β phase matter is hard, if the soft α phase of matter is interconnected, is difficult to chip breaking and chip removal during machining.
Summary of the invention
For above weak point, the invention provides the production technology of a kind of bluish yellow copper bar material.
A kind of production technology of ledrite bar, described production technology comprises the following steps:
(1) by raw material 1030～1090 DEG C of meltings, then holding furnace standing is poured into 5～20 minutes；
(2) horizontal casting: the copper water after fusing is carried out horizontal casting, and ingot casting specification is Φ 80～Φ 200mm；
(3) ingot casting heating: ingot casting heats 0.5～2 hour at 550～750 DEG C；
(4) extruding: the ingot casting heated carries out decortication extruding, and squeeze pressure is 5～20MN, extruded stock specification limit Φ 4～8mm；
(5) dish draws plane skin: extruded stock carries out dish and draws plane skin, and working modulus controls 2～10%；
(6) Lian Lalian moves back: the line base after dish draws plane skin draws continuous annealing unit to stretch through connecting, inlet wire specification Φ 4～8mm, outlet specification Φ 2.2～Φ 6.2mm, online annealing belongs to the annealing of continuous spreading formula, annealed wire speed is 150～400m/min, and annealing correction factor is 3.0～10.0；
(7) the Φ 2.2～Φ 6.2mm line base that associating drawing: Lian Lalian steps back is through combining the bar drawing out Φ 2.0～Φ 6.0mm；
(8) product inspection, pack, put in storage.
In described step (2), each technological parameter of horizontal casting is: hauling speed 3 × 104～15 × 104μm/s, draft travel 4 × 104～12 × 104μm, down time 10～120ms, anti-back speed degree 3 × 104～14 × 104μm/s, anti-regression journey 0.2 × 104～6 × 104μm, moves back between the stopping time 5～100ms, and ingot casting carries out sawing, sawing length 300～600mm on semi-automatic horizontal metal band sawing machine.
In described step (3), ingot casting is heated by feed rate 8～20 piece/hour in Medium Frequency Induction Heating Furnace.
In described step (4), the ingot casting heated carries out decortication extruding on 800～1800 tons of indirect extrusion machines, the remaining THICKNESS CONTROL of pressure at 10-25mm, extrusion line base quantity 1～4 simultaneously, the circle mode take-up of extruded stock dish.
In described step (5), the head of a dish extruded stock and the Tail-heating of another dish extruded stock, to 550～700 DEG C of joints, are then passed through inverted wire-drawing machine dish and draw and dig skin, dig skin amount 0.1～0.3mm, and dish is often coiled after drawing and heavily controlled 500～1500kg.
In described step (6), the number of molds even drawing continuous annealing unit is 1～4, draw speed 1～8m/s,.
In described step (7), associating drawing uses 2t associating drawing unit, drawing speed 0.5～10m/s, rod length fixing length 2～3.5m.
The present invention is by changing the annealing way of existing ledrite dish line, ledrite recrystallized structure is made to be become tiny from thick, tissue topography is: α phase is divided into relatively isolated little bulk by numerous tiny graininess β phases, through verification experimental verification, the ledrite bar that interior tissue is tiny, cutting ability is significantly improved, and can meet the processing request of High-Speed Automatic lathe.
Accompanying drawing explanation
Fig. 1 is the internal organizational structure figure by the model obtained by the production technology of embodiment 1 (right) and comparative example 1 (left) is C3604 Φ 5mm ledrite bar；
Fig. 2 is for considering pattern to be worth doing by the car that the model obtained by the production technology of embodiment 1 (right) and comparative example 1 (left) is C3604 Φ 5mm ledrite bar；
Fig. 3 is the drilling cuttings pattern by the model obtained by the production technology of embodiment 1 (right) and comparative example 1 (left) is C3604 Φ 5mm ledrite bar；
Fig. 4 is the internal organizational structure figure by the model obtained by the production technology of embodiment 2 (right) and comparative example 2 (left) is HPb59-1 Φ 4.2mm ledrite bar；
Fig. 5 is for considering pattern to be worth doing by the car that the model obtained by the production technology of embodiment 2 (right) and comparative example 2 (left) is HPb59-1 Φ 4.2mm ledrite bar；
Fig. 6 is the drilling cuttings pattern by the model obtained by the production technology of embodiment 2 (right) and comparative example 2 (left) is HPb59-1 Φ 4.2mm ledrite bar.
Detailed description of the invention
Embodiment 1
A kind of production technology of ledrite bar, the model of described ledrite bar is C3604 Φ 5mm, and described production technology comprises the following steps:
(1) carrying out dispensing by the composition of C3604 ledrite bar, dispensing is dividedly in some parts melting in electric induction furnace, smelting temperature is 1040 DEG C, stands 5～20 minutes after whole metal moltens；
(2) horizontal casting: copper water is drawn by crystallizer horizontal continuity in holding furnace, ingot casting specification Φ 120mm, hauling speed 6 × 104μm/s, draft travel 7 × 104μm, down time 50ms, anti-back speed degree 6 × 104μm/s, anti-regression journey 1 × 104μm, moves back 20ms between the stopping time, and ingot casting carries out sawing, sawing length 500mm on semi-automatic horizontal metal band sawing machine；
(3) ingot casting heating: ingot casting is heated by feed rate 11 piece/hour in Medium Frequency Induction Heating Furnace, is heated to temperature 620 DEG C, is incubated 0.8 hour；
(4) extruding: the ingot casting heated carries out decortication extruding, extruding force 10MN on 1250 tons of indirect extrusion machines, and the remaining THICKNESS CONTROL of pressure is at 15mm, and extruded stock specification is Φ 6.5mm, simultaneously extrusion line base quantity 4, the circle mode take-up of extruded stock dish.
(5) dish draws plane skin: the head of a dish extruded stock and the Tail-heating of another dish extruded stock, to 600 DEG C of joints, are then passed through inverted wire-drawing machine dish and draw and dig skin, and working modulus controls 7%, digs skin amount 0.25mm, and dish is often coiled after drawing and heavily controlled at 1200kg.
(6) Lian Lalian moves back: the line base after dish draws plane skin draws continuous annealing unit to stretch through connecting, number of molds 2, inlet wire specification Φ 6mm, outlet specification Φ 5.4mm, draw speed 4.8m/s, and online annealed wire speed is 245m/min, correction factor 3.4 of annealing.
(7) the Φ 5.4mm line base that associating drawing: Lian Lalian steps back draws out the bar of Φ 5.0mm, drawing speed 2m/s, rod length fixing length 2.5m through 2t associating drawing unit.
(8) product inspection, pack, put in storage.
The recrystal grain producing the C3604 Φ 5mm ledrite bar obtained according to above-mentioned production technology is tiny, α phase is divided into relatively isolated little massive texture by numerous tiny graininess β phases, improve the cutting ability of C3604 Φ 5mm ledrite bar, as Figure 1-3.
Embodiment 2
A kind of production technology of ledrite bar, the model of described ledrite bar is HPb59-1 Φ 4.2mm, and described production technology comprises the following steps:
(1) carrying out dispensing by the composition of HPb59-1 ledrite bar, dispensing is dividedly in some parts melting in electric induction furnace, smelting temperature is 1045 DEG C, pours holding furnace into and stand 10 minutes after whole metal moltens；
(2) horizontal casting: copper water is drawn by crystallizer horizontal continuity in holding furnace, ingot casting specification Φ 160mm, hauling speed 10 × 104μm/s, draft travel 10 × 104μm, down time 100ms, anti-back speed degree 10 × 104μm/s, anti-regression journey 5 × 104μm, moves back 80ms between the stopping time, and ingot casting carries out sawing, sawing length 500mm on semi-automatic horizontal metal band sawing machine；
(3) ingot casting heating: ingot casting is heated by feed rate 10 piece/hour in Medium Frequency Induction Heating Furnace, is heated to temperature 650 DEG C, is incubated 1.5 hours；
(4) extruding: the ingot casting heated carries out decortication extruding, extruding force 15MN on 1250 tons of indirect extrusion machines, and the remaining THICKNESS CONTROL of pressure is in 15mm, extruded stock specification limit Φ 6mm, extrusion line base quantity 2 simultaneously, the circle mode take-up of extruded stock dish.
(5) dish draws plane skin: the head of a dish extruded stock and the Tail-heating of another dish extruded stock, to 600 DEG C of joints, are then passed through inverted wire-drawing machine dish and draw and dig skin, and working modulus controls 6.5%, digs skin amount 0.2mm, and dish is often coiled after drawing and heavily controlled at 1000kg.
(6) Lian Lalian moves back: the line base after dish draws plane skin draws continuous annealing unit to stretch through connecting, number of molds 3, inlet wire specification Φ 5.6mm, outlet specification Φ 4.8mm, draw speed 5m/s, and online annealed wire speed is 260m/min, correction factor 3.2 of annealing.
(7) the Φ 4.8mm line base that associating drawing: Lian Lalian steps back draws out the bar of Φ 4.2mm, drawing speed 2.2m/s, rod length fixing length 2.5m through 2t associating drawing unit.
(8) product inspection, pack, put in storage.
The recrystal grain producing the HPb59-1 Φ 4.2mm ledrite bar obtained according to above-mentioned production technology is tiny, α phase is divided into relatively isolated little massive texture by numerous tiny graininess β phases, improve the cutting ability of HPb59-1 Φ 4.2mm ledrite bar, as Figure 4-Figure 6.
Comparative example 1
A kind of production technology of ledrite bar, the model of described ledrite bar is C3604 Φ 5mm, described production technology is same as in Example 1, in step (6), simply use well furnace, annealing temperature is 540 DEG C, 50 minutes heating-up times, temperature retention time is 210 minutes, and after anneal through overpickling laggard row associating drawing.
The C3604 Φ 5mm ledrite bar obtained is produced according to above-mentioned production technology, owing to annealing temperature is high, temperature retention time is long, recrystallized structure is thick, α phase and β phase are block distribution, are interconnected between α phase, owing to α phase matter is soft, β phase matter is hard, if the soft α phase of matter is interconnected, it is difficult to chip breaking and chip removal during machining, as Figure 1-3.
Comparative example 2
A kind of production technology of ledrite bar, the model of described ledrite bar is HPb59-1 Φ 4.2mm, described production technology is same as in Example 2, in step (6), simply use well furnace, annealing temperature is 560 DEG C, 50 minutes heating-up times, temperature retention time is 180 minutes, and after anneal through overpickling laggard row associating drawing.
The HPb59-1 Φ 4.2mm ledrite bar obtained is produced according to above-mentioned production technology, owing to annealing temperature is high, temperature retention time is long, recrystallized structure is thick, α phase and β phase are block distribution, are interconnected between α phase, owing to α phase matter is soft, β phase matter is hard, if the soft α phase of matter is interconnected, it is difficult to chip breaking and chip removal during machining, as Figure 4-Figure 6.
The above-mentioned detailed description production technology of ledrite bar carried out with reference to embodiment; it is illustrative rather than determinate; can according to restriction scope list several embodiments, therefore changing and modifications under without departing from present general inventive concept, within protection scope of the present invention should being belonged to.
Claims (7)
1. the production technology of a ledrite bar, it is characterised in that described production technology comprises the following steps:
(1) by raw material 1030～1090 DEG C of meltings, then holding furnace standing is poured into 5～20 minutes；
(2) horizontal casting: the copper water after fusing is carried out horizontal casting, and ingot casting specification is Φ 80～Φ 200mm；
(3) ingot casting heating: ingot casting was 550～750 DEG C of sensing heating 0.5～2 hour；
(4) extruding: the ingot casting heated carries out decortication extruding, and squeeze pressure is 5～20MN, extruded stock specification limit Φ 4～8mm；
(5) dish draws plane skin: extruded stock carries out dish and draws plane skin, and working modulus controls 2～10%；
(6) Lian Lalian moves back: the line base after dish draws plane skin draws continuous annealing unit to stretch through connecting, inlet wire specification Φ 4～8mm, outlet specification Φ 2.2～Φ 6.2mm, online annealing belongs to the annealing of continuous spreading formula, annealing speed line is 150～400m/min, and annealing correction factor is 3.0～4.0；
(7) the Φ 2.2～Φ 6.2mm line base that associating drawing: Lian Lalian steps back is through combining the bar drawing out Φ 2.0～Φ 6.0mm；
(8) product inspection, pack, put in storage.
Production technology the most according to claim 1, it is characterised in that in described step (2), each technological parameter of horizontal casting is: hauling speed 3 × 104～15 × 104μm/s, draft travel 4 × 104～12 × 104μm, down time 10～120ms, anti-back speed degree 3 × 104～14 × 104μm/s, anti-regression journey 0.2 × 104～6 × 104μm, moves back between the stopping time 5～100ms, and ingot casting carries out sawing, sawing length 300～600mm on semi-automatic horizontal metal band sawing machine.
Production technology the most according to claim 1, it is characterised in that in described step (3), ingot casting is heated by feed rate 8～20 piece/hour in Medium Frequency Induction Heating Furnace.
Production technology the most according to claim 1, it is characterised in that in described step (4), the ingot casting heated carries out decortication extruding on 800～1800 tons of indirect extrusion machines, the remaining THICKNESS CONTROL of pressure at 10-25mm, extrusion line base quantity 1～4 simultaneously, the circle mode take-up of extruded stock dish.
Production technology the most according to claim 1, it is characterized in that, in described step (5), the head of one dish extruded stock and the Tail-heating of another dish extruded stock are to 550～700 DEG C of joints, it is then passed through inverted wire-drawing machine dish draw and dig skin, plane skin amount 0.1～0.3mm, dish is often coiled after drawing and is heavily controlled 500～1500kg.
Production technology the most according to claim 1, it is characterised in that in described step (6), the number of molds even drawing continuous annealing unit is 1～4, draw speed 1～8m/s.
Production technology the most according to claim 1, it is characterised in that in described step (7), associating drawing uses 2t associating drawing unit, drawing speed 0.5～10m/s, rod length fixing length 2～3.5m.
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| CN201610325744.XA CN105821357B (en) | 2016-05-17 | 2016-05-17 | A kind of production technology of lead and yellow-collation copper bar material |
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| CN201610325744.XA CN105821357B (en) | 2016-05-17 | 2016-05-17 | A kind of production technology of lead and yellow-collation copper bar material |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604276A (en) * | 2017-09-08 | 2018-01-19 | 宁波金田铜业(集团)股份有限公司 | A kind of processing method of cutting brass alloy rod, wire rod |
| CN108018460A (en) * | 2017-11-14 | 2018-05-11 | 周达义 | A kind of abnormity brass tube preparation method |
| CN109652676A (en) * | 2018-12-27 | 2019-04-19 | 怀集国东铜材制造有限公司 | A kind of LEAD-FREE BRASS ALLOY bar and preparation method thereof |
| CN111304488A (en) * | 2020-03-25 | 2020-06-19 | 宁波金田铜业(集团)股份有限公司 | Stress cracking resistant lead brass bar and preparation method thereof |
| CN111663063A (en) * | 2020-06-23 | 2020-09-15 | 宁波金田铜业(集团)股份有限公司 | Lead brass bar suitable for high-speed automatic processing and preparation method thereof |
| CN112588857A (en) * | 2020-11-16 | 2021-04-02 | 宁波长振铜业有限公司 | Method for extruding small wires by large-scale reversing machine |
| CN113182375A (en) * | 2021-04-09 | 2021-07-30 | 宁波长振铜业有限公司 | Method for producing brass alloy small-size wire and bar products |
| CN115213586A (en) * | 2022-08-22 | 2022-10-21 | 江苏亨通电力智网科技有限公司 | Wear-resistant and corrosion-resistant manganese-aluminum bronze welding wire and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107604276B (en) * | 2017-09-08 | 2019-06-14 | 宁波金田铜业(集团)股份有限公司 | A kind of processing method of cutting brass alloy stick, wire rod |
| CN107604276A (en) * | 2017-09-08 | 2018-01-19 | 宁波金田铜业(集团)股份有限公司 | A kind of processing method of cutting brass alloy rod, wire rod |
| CN108018460A (en) * | 2017-11-14 | 2018-05-11 | 周达义 | A kind of abnormity brass tube preparation method |
| CN108018460B (en) * | 2017-11-14 | 2020-01-10 | 周达义 | Preparation method of special-shaped brass tube |
| CN109652676A (en) * | 2018-12-27 | 2019-04-19 | 怀集国东铜材制造有限公司 | A kind of LEAD-FREE BRASS ALLOY bar and preparation method thereof |
| CN111304488B (en) * | 2020-03-25 | 2021-05-11 | 宁波金田铜业(集团)股份有限公司 | Stress cracking resistant lead brass bar and preparation method thereof |
| CN111304488A (en) * | 2020-03-25 | 2020-06-19 | 宁波金田铜业(集团)股份有限公司 | Stress cracking resistant lead brass bar and preparation method thereof |
| CN111663063A (en) * | 2020-06-23 | 2020-09-15 | 宁波金田铜业(集团)股份有限公司 | Lead brass bar suitable for high-speed automatic processing and preparation method thereof |
| CN111663063B (en) * | 2020-06-23 | 2022-04-01 | 宁波金田铜业(集团)股份有限公司 | Lead brass bar suitable for high-speed automatic processing and preparation method thereof |
| CN112588857A (en) * | 2020-11-16 | 2021-04-02 | 宁波长振铜业有限公司 | Method for extruding small wires by large-scale reversing machine |
| CN112588857B (en) * | 2020-11-16 | 2022-06-17 | 宁波长振铜业有限公司 | Method for extruding small wires by large-scale reversing machine |
| CN113182375A (en) * | 2021-04-09 | 2021-07-30 | 宁波长振铜业有限公司 | Method for producing brass alloy small-size wire and bar products |
| CN115213586A (en) * | 2022-08-22 | 2022-10-21 | 江苏亨通电力智网科技有限公司 | Wear-resistant and corrosion-resistant manganese-aluminum bronze welding wire and preparation method thereof |
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Effective date of registration: 20170112 Address after: 241009 Anhui city of Wuhu Province, Hunan Road economic and Technological Development Zone No. 21 Applicant after: Anhui Xinke Copper Co. Ltd. Address before: 241009 Zhujianglu Road economic and Technological Development Zone, Anhui, No. 3, Applicant before: Anhui Xinke New Material Co., Ltd. |
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