Wear-resistant easy-to-cut brass pipe material and method of using same to manufacture brass pipe

Abstract

The invention discloses a wear-resistant easy-to-cut brass pipe material and a method of using the same to manufacture a brass pipe. The wear-resistant easy-to-cut brass pipe material is composed of 60-65wt% of copper, 0.5-3.5wt% of manganese, 0.5-3.5wt% of silicon, 0.2-3.0wt% of lead, 0.05-0.2wt% of iron, 0.1-0.3wt% of nickel, 0.1-0.3wt% of aluminum and the rest zinc and unavoidable impurities, wherein total amount of the unavoidable impurities is not larger than 0.1wt%. The manufacturing method includes: taking copper-zinc alloy as a base, and forming the easy-to-cut brass pipe material taking an alpha phase as a matrix and added by 15-20% beta phase and a small amount of silicon and manganese wear-resistant phase Mn5Si3 uniformly distributed on the alpha phase matrix and a beta phase matrix through alloy elements, capable of forming wear-resistant phase, like silicon, manganese and a small amount of lead. The pipe material is extruded to form the pipe, and an extruding-cold rolling process is adopted to reduce or eliminate metal transverse crack defect after uniform annealing, so that the brass pipe material is high in surface smoothness, easy to cut and machine, higher in strength and tenacity and more stable in wear resistance.

Description

technical field [0001] The invention belongs to the field of nonferrous metal processing, in particular to a wear-resistant and easy-cutting brass pipe material and a method for manufacturing the brass pipe. Background technique [0002] Brass is a copper alloy with zinc as the main element. It has excellent thermal conductivity, mechanical properties and processing properties. Generally, in order to improve the performance of brass, metals such as manganese, silicon, aluminum, iron, lead, tin, and nickel are added to form a multi-element alloy, which is usually called complex brass or special brass. Lead in lead brass is not solid-soluble in Cu-Zn alloy. After pressure processing, it is distributed in the solid solution in a free state and isolated phase, which has a strong lubricating and anti-friction effect, making the alloy have extremely high machinability, and The work surface is smooth and clean. However, lead is easy to precipitate and has an impact on the human b...

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Problems solved by technology

However, due to the brittleness of the material, it is easy to crack during rolling or stretching, and it is only used for electronic appliances, connectors, instrument parts and water pipes of drinking water systems, etc.

[0003] Chinese patent 200510080322.2 is a preparation method of high-strength and wear-resistant brass pipes, which is based on a new type of high-strength and high-strength brass matrix material based on the β phase. It leads to an increase in the degree of uneven deformation, which is not good for improving the distribution of wear-resistant phases and effectively controlling the number of α phases through cooling; moreover, the precision control of the pipe is not good (the pipe eccentricity is large), the machinability is not good, and it is impossible to manufacture large and heavy pipes. Loading equipment and precision parts processing requirements

[0004] For example, the material of the copper sleeve inlaid in the inner hole of the hydraulic pump cylinder is a high-strength wear-resistant brass tube. The copper tube does not contain lead in general, resulting in insufficient surface finish, and it is easy to scratch the friction pair during the friction process. Or there is an inaccurate fit with the friction pair tooling; compared with the conventional brass H62 and H65 brass tubes, the above brass tubes have no wear-resistant phase, and are very prone to wear during the friction process, which eventually leads to part failure

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