Preparation method of locomotive braking resistance tape capable of reducing resistance temperature coefficient

Abstract

The invention relates to a locomotive braking resistance tape and a preparation method thereof. The locomotive braking resistance tape comprises the following principal components in percentage by weight: 13.5%-14.5% of chromium, 3.5%-4.5% of aluminum, 0.25%-0.35% of titanium, less than or equal to 0.04% of carbon, 0.05%-0.10% of rare-earth and the balance of iron. The preparation method of the locomotive braking resistance tape sequentially comprises the following steps: vacuum smelting, electroslag remelting, forging, hot rolling, annealing heat treatment, pickling, polishing, trimming, cold rolling, gas protection annealing and strip forming. The locomotive braking resistance tape disclosed by the invention can be used for greatly reducing the production cost by being made of a ferrite alloy without using metallic nickel any longer, enhancing the resistance uniformity of the resistance tape by adopting a titanium element and enhancing the product quality by reducing the resistance temperature coefficient of the resistance tape; the preparation method disclosed by the invention comprises a vacuum smelting procedure and can be used for lessening the sufficient air content of the generated resistance tape, thereby ensuring the product purity.

Description

[0001] This application is a divisional application, the application number of the original application: 201110230208.9, the application date: 2011-08-11, and the name of invention and creation is "locomotive braking resistor belt and its preparation method". technical field [0002] The invention relates to an alloy and a manufacturing process thereof, in particular to a locomotive braking resistor strip and a preparation method thereof. Background technique [0003] Resistor braking devices are used in electric drive diesel locomotives on railway trunk lines, because the locomotive is powered by a diesel engine and is connected to the main generator through an elastic coupling. Power supply; the traction motor is transmitted to the driven gear on the wheelset through the driving gear to drive the wheeled train to run. The whole process is the rotation process of mechanical energy-electrical energy-mechanical energy. When the locomotive is braking, because the rotor speed o...

AI Technical Summary

Problems solved by technology

For example: the commonly used brand N40 resistance alloy for locomotive brakes in the market, its main components and content are: Ni: 34.0-37.0%, Cr: 18.0-21.0%, Si: 1.0-3.0%, C ≤ 0.10%, Mn ≤ 1.00%, Al ≤ 0.05%, Fe: the balance, but due to the high content of nickel, its price is too high; there is also a stainless steel plate with a brand name of 310S, whose main components are: Ni: 19.0-22.0%, Cr: 24.0-26.0%, Si: ≤1.5%, C≤0.08%, Mn≤2.00%, Fe: balance, although it reduces the usage of Ni, the overall cost is still high , and the resistivity is only 0.95uQ m, which is not suitable as a resistance band for locomotive brakes