Method for preparing copper and nickel alloy seamless copper tube

Abstract

The invention relates to a copper nickel seamless copper tube with 92. 9-93. 6% copper and 6. 4-7. 1% nickel. It takes electrolytic copper and nickel to a low frequency electric oven to heat to 1320-1340deg.C, casting into solid ingot which is heated to 650-750deg.C for heat piercing to get the surface smooth ingot to heat to 650-750deg.C for squeezing to gross blank tube which is extended and peeled for cold reeling, to get the size of the product after annealing. Through calibration and rectification, cleaning and annealing, the product is inspected and put to stock. The content for nickel is 6. 4-7. 1%. It is better in processing feature due to the low nickel and better in corrosion resistant features than copper due to the content of nickel. It is also low in cost.

Description

technical field

[0001] The invention relates to a method for preparing a copper-nickel alloy seamless copper pipe. Mainly used in heat exchangers in power stations, ships, refrigeration and other industries as heat exchange tubes. Background technique

[0002] At present, with the development of power stations, ships, and refrigeration industries, it is necessary to find a heat exchange tube material with low cost, good corrosion resistance and processing performance. The original heat exchange tubes were mostly brass tubes, high nickel white copper tubes or red copper tubes. However, brass tubes, high-nickel white copper tubes and copper tubes all have their shortcomings, which are described below:

[0003] 1. Brass tubes: The cost of brass tubes is relatively low, but the corrosion resistance and processing performance are not as good as those of white copper tubes. Generally, a batch needs to be repaired and replaced in about three years. The maintenance cost of power ...