Continuous Casting And Rolling Method To Replace The Traditionally Cited The Production Of High-speed Electrified Railway Line Of Contact With Copper-silver Alloy

In order to adapt our country's economic development, electrified railway is continuously enhanced its speed. The contact lead, using in electrified railway, is been acquired having higher strength, electivity and wear resistance. This project studying sequential cast-rolling method (SCR) instead of traditional up-cast method, produces copper- silver alloy contact lead.This paper particularly studies the technological lines of producing copper- silver alloy lead using SCR method. This paper designed the components of Cu and Ag in the alloy through experiment, and produced ingot blank , tested its chemical composition and properties. The test result indicated that the content of Ag in copper-silver alloy controlled in 0.1 + 0.01% and cold deformation processing controlled in 40%~60% could remarkably improve the dynamics properties of Cu-Ag alloy.Applied the conclusion to the Cu-Ag alloy producing technique using SCR method, we produced φ 19mm Cu-Ag0.1% alloy poles through smelting and rolling. We tested the microstructure, chemical composition, mechanism properties and physical properties of casting blank and alloy pole. The φ 19mm Cu-Ag10.1% alloy pole is processed into Cu-Ag alloy contact lead that sectional area is 120mm2 after cold drawing , i.e. CTHA120. Comparing to the traditional method after testing, we found that through SCR m ethod Cu-AgO.1% alloy contact lead's tensile strength and tensile breaking force had superiority over traditional method producing CTHA120, and the high temperature softening resistance of Cu-Ag alloy was also dramatically enhanced. The electric conduction properties was above 97.2% IACS.