Brass bar and preparation method thereof

Abstract

The invention discloses a brass bar. The brass bar is characterized in that the brass is prepared from the following components including, by weight, 57% to 59% of Cu, 0.2% to 0.8% of Pb, 1.5% to 3.0% of Mn, 1.3% to 2.3% of Al, 0.2% to 0.8% of Si, 0.5% to 0.8% of P, 0.4% to 0.6% of Ca, 0.4% to 1.0% of Ni, 0.01% to 0.03% of B and the balance Zn and inevitable impurities. According to the brass bar, P, Ca, B and Ni are added on the basis of CW713R, the content of a second phase in a matrix is increased, so that the matrix structure is continuously cut off, when a cutter is used for machining, the contact with the matrix can be reduced, the machining resistance is reduced, the machinability is optimized, and the strength and hardness of the matrix are improved due to the existence of the second phase, so that the overall strength of the material is improved.

Description

technical field

[0001] The invention belongs to the technical field of copper alloys, and in particular relates to a brass rod and a preparation method thereof. Background technique

[0002] CW713R is a wear-resistant complex brass, mainly used in plunger pumps, floating bearings, thrust bearings, valve guides and other fields. A wear-resistant phase with extremely high hardness is uniformly and stably distributed. An excellent wear-resistant mechanism is formed between the wear-resistant phase with extremely high hardness and the matrix with relatively low hardness, and it is also conducive to the establishment of a stable lubricating layer during friction, so that the material can be used under severe working conditions of high speed and heavy load. Effectively resist the impact of loads and severe wear, have good high strength and wear resistance, the production technology is difficult, and the accessory value is high. Although the overall market demand is not large, mos...

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