Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparing method of ultralow tin-copper tin contact line

A contact wire, tin-copper technology, which is applied in the field of preparation of ultra-low tin-copper-tin contact wire, can solve problems affecting the strength and conductivity of the contact wire, and achieve the effects of saving manufacturing costs and improving tensile strength

Active Publication Date: 2016-10-12
FUJIKURA HENGTONG AERIAL CABLE SYST +2
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the contact wire manufacturing process, in addition to the casting process, plastic forming processes such as extrusion and drawing are mainly used, and these processes will seriously affect the strength and conductivity of the contact wire.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0019] First, pure copper is used as the matrix, and it is put into the casting cavity of the upward continuous casting furnace, and 0.015% tin by weight is added to the casting cavity. During the casting process, the temperature in the casting cavity is controlled at 1150 °C ± 5°C.

[0020] The pure copper and tin put in are melted in the casting cavity to form a molten copper-tin alloy solution. The surface of the copper-tin alloy solution is covered with a covering agent. The covering agent here is charcoal. Of course, graphite phosphorus flakes can also be used. similar coverings. During the casting process, the thickness of the covering agent is kept at 100mm-160mm to ensure the low oxygen content of the copper-tin alloy solution.

[0021] Then maintain the speed of 300m / min for traction, the traction pitch is kept at about 3.5mm, the temperature of the cooling water in the crystallizer is controlled at 20°C±2°C, and the temperature difference between the inlet and outle...

specific Embodiment 2

[0024] In this embodiment, pure copper is still used as the matrix, and the percentage by weight of tin added to the casting cavity of the upward-leading continuous casting furnace is 0.10%, and the temperature in the casting cavity is controlled at 1180°C±5°C during the casting process. The input pure copper and tin are melted in the casting cavity to form a molten copper-tin alloy solution. The surface of the copper-tin alloy solution is covered with a covering agent, and the thickness of the covering agent is kept at 100mm-160mm.

[0025] Then maintain the speed of 340m / min for traction, the traction pitch is kept at about 4.5mm, the temperature of the cooling water in the crystallizer is controlled at 23°C±2°C, and the temperature difference between the inlet and outlet of the crystallizer cooling water is controlled within 10°C. The up-drawing continuous casting rod with a rod diameter of Φ20mm was obtained by traction.

[0026] Next, extrude the obtained upward continuou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparing method of an ultralow tin-copper tin contact line. When a casting rod is produced through an upcasting continuous casting furnace, the content of tin in molten copper is controlled, and on the premise that the conductive property of the casting rod is ensured, successively through control over the rod diameter of an extrusion rod and cold rolling and cold draw forming production, electrical conductivity and tensile strength of the finally-obtained finished product contact line are greatly improved; and the other properties approach to the property of a copper-silver contact line, and therefore the ultralow tin-copper tin contact line can replace the copper-silver contact line to be used, and the manufacturing cost of the contact line can be greatly saved.

Description

technical field [0001] The invention relates to a preparation method of an ultra-low-tin copper-tin contact wire. Background technique [0002] As the operating speed of electrified railways increases, the suspension tension of contact wires and catenary cables also increases greatly, requiring contact wires to maintain high electrical conductivity while having higher tensile strength. At present, contact wires for high-speed rail mainly include copper-magnesium, copper-tin, and copper-silver alloys. For single-phase solid solution copper-tin alloys, strength and conductivity are mutually restricted. In addition, in the contact wire manufacturing process, in addition to the casting process, plastic forming processes such as extrusion and drawing are basically used, and these processes will seriously affect the strength and conductivity of the contact wire. Therefore, when we study the experimental processing route, we need to use the continuous extrusion process to improve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/00B21C37/04H01B1/02H01B13/00
CPCB21C37/045B22D11/004H01B1/026H01B13/00
Inventor 陈明盛春敏王如见于兵
Owner FUJIKURA HENGTONG AERIAL CABLE SYST