Copper-tin alloy contact wire for electrified railway and continuous manufacturing method thereof

Abstract

The invention discloses a copper-tin alloy contract wire for an electrified railway and a continuous manufacturing process thereof. The alloy of the copper-tin alloy contract wire comprises the following components in weight ratio: 0.195-0.435% of metallic tin, 99.755-99.515% of metallic copper and 0.05% of other impurities. The continuous manufacturing process aims at different types of copper-tin alloy contract wires to produce and controls the content range of tin of a copper-tin alloy extrusion stem, so that the copper-tin alloy extrusion stem can conduct flash butt welding, and then continuous production is realized. The continuous manufacturing process can ensure the one-time success rate of continuity of the copper-tin alloy extrusion stem and the production efficiency.

Description

[0001]

Technical field

[0002] The invention belongs to the field of copper alloy processing, and relates to a copper-tin alloy contact wire for electrified railways and a continuous manufacturing method thereof.

[0003]

Background technique

[0004] The copper-tin alloy contact wire product for electrified railway is an important part of the traction system of high-speed electrified railway. In the production process of copper-tin alloy contact wire products, in order to ensure the continuity of product processing, the continuous use of copper-tin alloy contact wire blanks is the key.

[0005] Then the main means of continuation is welding. The welding of copper-tin alloy extruded rods generally adopts the method of flash butt welding. First, the two working sections are slightly contacted to form a large number of contact points. When the current passes, the contact points melt and become a liquid metal lintel connecting the two ends. Due to the extremely high current...

Examples

Embodiment 1

[0024] In the present invention, first, high-purity cathode copper (accounting for 99.755% of the total amount) is added into the upper furnace for melting as a raw material, and then according to the production process, 0.195% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 85mm 2 Finished copper-tin alloy contact wire.

Embodiment 2

[0026] In the present invention, first, high-purity cathode copper (accounting for 99.745% of the total amount) is added as a raw material into the upper induction furnace for melting, and then according to the production process, 0.205% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 110mm 2 Finished copper-tin alloy contact wire.

Embodiment 3

[0028] In the present invention, high-purity cathode copper (accounting for 99.735% of the total amount) is firstly added into the upper furnace for melting as a raw material, and then according to the production process, 0.215% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 120mm 2 Finished copper-tin alloy contact wire.

[0001]

Technical field

[0002] The invention belongs to the field of copper alloy processing, and relates to a copper-tin alloy contact wire for electrified railways and a continuous manufacturing method thereof.

[0003]

Background technique

[0004] The copper-tin alloy contact wire product for electrified railway is an important part of the traction system of high-speed electrified railway. In the production process of copper-tin alloy contact wire products, in order to ensure the continuity of product processing, the continuous use of copper-tin alloy contact wire blanks is the key.

[0005] Then the main means of continuation is welding. The welding of copper-tin alloy extruded rods generally adopts the method of flash butt welding. First, the two working sections are slightly contacted to form a large number of contact points. When the current passes, the contact points melt and become a liquid metal lintel connecting the two ends. Due to the extremely high current...

Examples

Embodiment 1

[0024] In the present invention, first, high-purity cathode copper (accounting for 99.755% of the total amount) is added into the upper furnace for melting as a raw material, and then according to the production process, 0.195% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 85mm 2 Finished copper-tin alloy contact wire.

Embodiment 2

[0026] In the present invention, first, high-purity cathode copper (accounting for 99.745% of the total amount) is added as a raw material into the upper induction furnace for melting, and then according to the production process, 0.205% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 110mm 2 Finished copper-tin alloy contact wire.

Embodiment 3

[0028] In the present invention, high-purity cathode copper (accounting for 99.735% of the total amount) is firstly added into the upper furnace for melting as a raw material, and then according to the production process, 0.215% metal tin by weight is added to the copper liquid, and graphite rods are used to After stirring to make the alloy composition uniform, the billet rod is started. Then feed the tin-containing alloy upper lead drawn out into the continuous extruder to make a 20mm extruded rod, and then connect the end of the extruded rod with the tail of the extruded rod on the pay-off frame of the drawing machine with flash butt welding. Mark the joint, cut the finished copper-tin alloy contact wire from the extruded rod at the joint, and continue drawing to make 120mm 2 Finished copper-tin alloy contact wire.

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