CN101707084B - Manufacturing method for copper-magnesium alloy stranded wire - Google Patents
Manufacturing method for copper-magnesium alloy stranded wire Download PDFInfo
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- CN101707084B CN101707084B CN 200910185386 CN200910185386A CN101707084B CN 101707084 B CN101707084 B CN 101707084B CN 200910185386 CN200910185386 CN 200910185386 CN 200910185386 A CN200910185386 A CN 200910185386A CN 101707084 B CN101707084 B CN 101707084B
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Abstract
The invention relates to a manufacturing method for a copper-magnesium alloy stranded wire. In the copper-magnesium alloy stranded wire, according to weight percentage, the content of copper is more than 99.6%, the content of magnesium is 0.15% to 2.0%, the content of indium is more than 0.005% to 0.008%, and the residue is unavoidable impurity. The sum of the weight percentages of all components is 100%. The method comprises the steps of: placing cathode copper and magnesium (containing more than 99.95% of copper) in a vacuum melting furnace, heating to 1050 to 1200 DEG C, melting to copper-magnesium alloy ingot, melting the copper-magnesium alloy ingot into copper-magnesium alloy solution in the line frequency furnace at 1050 to 1200 DEG C, inserting a crystallizer into the copper-magnesium alloy solution, casting the copper-magnesium alloy solution into copper-magnesium alloy rod by utilizing up-casting method, separating oxygen with wood charcoal, cooling with a water separating sleeve, connecting, extruding, pulling and stranding. The copper-magnesium alloy stranded wire manufactured by using the method of the invention can meet the strength demand of high-speed electrification railway and can promote the electric conduction property thereof.
Description
(1) technical field
The present invention relates to a kind of production method of copper-magnesium alloy strand.Being mainly used in the high-speed electric railway contact line uses as current-carrying alloy carrier cable.Belong to electrical alloy material technology field.
(2) background technology
Current-carrying alloy carrier cable is the capital equipment in the high-speed electric railway contact line.Play the suspension effect and the effect of compensation current-carrying of electric locomotive transmission pressure.Along with the China Railway demand is growing, electric railway improves constantly the Electric Locomotive and the speed of service, and develop to the direction of high-speed railway, the ampacity of depending merely on contact wire has not satisfied the requirement of high-speed railway power supply capacity, and carrier cable must can be born higher current load.Its intensity of copper-magnesium alloy strand that generally adopts both at home and abroad can satisfy the requirement of high-speed electric railway at present, and still, its electric conductivity can not effectively satisfy the compensation current-carrying requirement of high-speed electric railway.Tracing it to its cause, is that its content reaches 0.45～0.55% (percentage by weight) because the content of magnesium in the copper-magnesium alloy strand is higher.Content of magnesium is high more, and intensity is high more, but electric conductivity is poor more.Its conductance only is 62.1%.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, provide a kind of and can satisfy the requirement of strength of high-speed electric railway, can improve the production method of the copper-magnesium alloy strand of its electric conductivity again.
The object of the present invention is achieved like this: a kind of production method of copper-magnesium alloy strand, copper content＞99.60% (percentage by weight) in the described copper-magnesium alloy strand, content of magnesium 0.15～2.0% (percentage by weight), indium 0.005～0.008% (percentage by weight), surplus is a unavoidable impurities, and the percentage by weight summation of each component is 100%.Described method comprises following processing step:
Step 1, melting and continuous up-casting
The tough cathode and the magnesium of copper content＞99.95% (percentage by weight) are placed vacuum melting furnace, be heated to 1050～1200 ℃, be smelted into the copper magnesium alloy ingot, utilizing temperature again is that 1050～1200 ℃ main frequency furnace is smelted into copper magnesium alloy liquid with the copper magnesium alloy ingot, crystallizer is directly stretched in the copper magnesium alloy liquid, adopt the method for continuous up-casting, copper magnesium alloy liquid continuous up-casting is become the copper magnesium alloy bar, adopt the charcoal oxygen barrier during continuous up-casting, the cooling of water spacer;
Step 2, connection extruding and multi-pass drawing
The copper magnesium alloy bar is connected extruding and multi-pass drawing, form copper magnesium alloy monofilament blank;
Step 3, wire drawing
Adopt wire drawing machine that copper magnesium alloy monofilament blank is carried out the multi-pass wire drawing, make the copper magnesium alloy monofilament of given size;
Step 4, twisted wire
Many copper magnesium alloy monofilament strands are made copper-magnesium alloy strand.
The invention has the beneficial effects as follows:
Because the present invention drops to 0.15～2.0% with content of magnesium in the copper-magnesium alloy strand by 0.45～0.55%, and has increased by 0.005～0.008% rare earth element indium, content of magnesium reduces the electric conductivity that can improve copper-magnesium alloy strand, but has descended intensity.The present invention has changed the interior in as-cast metallographic structure of copper magnesium alloy bar, and has made grain size tiny, even by the copper magnesium alloy bar being connected extruding and multi-pass drawing in connecting extrusion process; Utilize the friction calendering of copper magnesium alloy bar and mould in drawing process, powder sintered in the generation of copper magnesium alloy bar surface, this has improved the intensity of copper magnesium alloy hinge line greatly.Obviously be better than the rolling product of multi-pass in the past.This be because the rolling product of multi-pass do not pass through continuously extruded, metallographic structure that it is inherent or as cast condition.Add the rare earth element indium simultaneously and not only can remove pernicious gas such as oxygen, hydrogen, impurity in the copper magnesium alloy, purify matrix, can also improve the plasticity and the toughness of copper magnesium alloy hinge line.Specific performance is asked for an interview table 1.
Table 1 the present invention and the European NFC standard techniques parameter table of comparisons
(4) embodiment
Embodiment 1:
1, gets the tough cathode 99.80kg of copper content＞99.95% (percentage by weight), magnesium ingot 0.20Kg and rare earth element indium 0.05kg, place vacuum melting furnace, be heated to 1050～1200 ℃, be smelted into the copper magnesium alloy ingot, utilize heating-up temperature the copper magnesium alloy ingot to be smelted into copper magnesium alloy liquid again at 1050～1200 ℃ main frequency furnace, crystallizer is directly stretched in the copper magnesium alloy liquid, adopt the method for continuous up-casting, copper magnesium alloy liquid continuous up-casting is become the copper magnesium alloy bar, adopt the charcoal oxygen barrier during continuous up-casting, the cooling of water spacer.
2, the copper magnesium alloy bar is connected extruding and multi-pass drawing, form copper magnesium alloy monofilament blank.
3, adopt wire drawing machine that copper magnesium alloy monofilament blank is carried out the multi-pass wire drawing, make the copper magnesium alloy monofilament of given size.
4, many copper magnesium alloy monofilament strands are made copper-magnesium alloy strand.
After testing, the conductance of the copper-magnesium alloy strand monofilament of being made by said method is brought up to 80%IACS by 62.1%IACS in the past, and intensity is also brought up to 630MPa.
Claims (1)
1. the production method of a copper-magnesium alloy strand, copper content in the described copper-magnesium alloy strand＞99.60% percentage by weight, content of magnesium 0.15% percentage by weight, indium 0.005～0.008% percentage by weight, surplus is a unavoidable impurities, the percentage by weight summation of each component is 100%, and described method comprises following processing step:
Step 1, melting and continuous up-casting
The tough cathode and the magnesium of copper content＞99.95% percentage by weight are placed vacuum melting furnace, be heated to 1050～1200 ℃, be smelted into the copper magnesium alloy ingot, utilizing temperature again is that 1050～1200 ℃ main frequency furnace is smelted into copper magnesium alloy liquid with the copper magnesium alloy ingot, crystallizer is directly stretched in the copper magnesium alloy liquid, adopt the method for continuous up-casting, copper magnesium alloy liquid continuous up-casting is become the copper magnesium alloy bar, adopt the charcoal oxygen barrier during continuous up-casting, the cooling of water spacer;
Step 2, connection extruding and multi-pass drawing
The copper magnesium alloy bar is connected extruding and multi-pass drawing, form copper magnesium alloy monofilament blank;
Step 3, wire drawing
Adopt wire drawing machine that copper magnesium alloy monofilament blank is carried out the multi-pass wire drawing, make the copper magnesium alloy monofilament of given size;
Step 4, twisted wire
Many copper magnesium alloy monofilament strands are made copper-magnesium alloy strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200910185386 CN101707084B (en) | 2009-11-09 | 2009-11-09 | Manufacturing method for copper-magnesium alloy stranded wire |
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| CN 200910185386 CN101707084B (en) | 2009-11-09 | 2009-11-09 | Manufacturing method for copper-magnesium alloy stranded wire |
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| CN101707084A CN101707084A (en) | 2010-05-12 |
| CN101707084B true CN101707084B (en) | 2011-09-21 |
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| CN 200910185386 Active CN101707084B (en) | 2009-11-09 | 2009-11-09 | Manufacturing method for copper-magnesium alloy stranded wire |
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2009
- 2009-11-09 CN CN 200910185386 patent/CN101707084B/en active Active
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| CN107685078A (en) * | 2017-07-10 | 2018-02-13 | 常州易藤电气有限公司 | A kind of preparation method of electric railway copper alloy dropper line |
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Address after: 214423 No. 113 West Harbour Road, Zhouzhuang Town, Jiangyin, Jiangsu Patentee after: JIANGYIN ELECTRICAL ALLOY CO., LTD. Address before: 214423 No. 113 West Harbour Road, Zhouzhuang Town, Jiangyin, Jiangsu Patentee before: Jiangyin Electrical Alloy Co., Ltd. |