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Brass bar and preparation method thereof

A brass bar and brass technology, applied in the field of copper alloys, can solve the problems of poor machining performance of CW713R, vulnerable knives, and unfavorable cutting, and achieve the effects of optimizing machinability, improving overall strength, and reducing machining resistance.

Active Publication Date: 2021-11-02
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing CW713R matrix phase is relatively soft, which is not conducive to cutting, and because CW713R contains a wear-resistant phase with extremely high hardness, when the wear-resistant phase is agglomerated in the matrix, it is very easy to damage the knife, resulting in poor overall machining performance of CW713R

Method used

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  • Brass bar and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mass percentage composition of the brass rod is Cu: 58.16wt%, Pb: 0.73wt%, Mn: 2.25wt%, Al: 2.05wt%, Si: 0.55wt%, P: 0.65wt%, Ca: 0.55wt% , Ni: 0.75wt%, B: 0.015wt%, and the balance is Zn.

[0027] The preparation steps of this embodiment are:

[0028] 1) Smelting: first put the electrolytic plate into the furnace, after the electrolytic plate is melted, increase the voltage to 600V, cover the liquid surface with charcoal, the covering height is more than 5mm, and the temperature reaches 1100℃~1150℃, metal aluminum, manganese, silicon , lead are added into the copper water in turn, stirred after melting, the voltage is raised to 400V, the temperature is lowered to 980 ° C ~ 1020 ° C, zinc is added to the copper water, and the temperature is kept for 3 minutes after melting. The copper-phosphorus alloy (the mass content of phosphorus is 7%), Copper-calcium alloy (the mass content of calcium is 10%) and metal nickel are added into the copper liquid with a pressure sp...

Embodiment 2

[0033] The mass percentage composition of the brass rod is Cu: 58.85wt%, Pb: 0.75wt%, Mn: 1.98wt%, Al: 1.48wt%, Si: 0.66wt%, P: 0.61wt%, Ca: 0.51wt% , Ni: 0.65wt%, B: 0.02wt%, and the balance is Zn.

[0034] The preparation steps of this embodiment are:

[0035] 1) Smelting: first put the electrolytic plate into the furnace, after the electrolytic plate is melted, increase the voltage to 610V, cover the liquid surface with charcoal, the covering height is more than 5mm, and the temperature reaches 1100 ℃ ~ 1150 ℃, metal aluminum, manganese, silicon , lead are added into the copper water in turn, stirred after melting, the voltage is raised to 410V, the temperature is lowered to 980 ° C ~ 1020 ° C, zinc is added to the copper water, and the temperature is kept for 3 minutes after melting. The copper-phosphorus alloy (the mass content of phosphorus is 7%), Copper-calcium alloy (the mass content of calcium is 10%) and metal nickel are added into the copper liquid with a pressure...

Embodiment 3

[0040] The mass percentage composition of the brass rod is Cu: 58.65wt%, Pb: 0.65wt%, Mn: 2.01wt%, Al: 1.58wt%, Si: 0.65wt%, P: 0.66wt%, Ca: 0.57wt% , Ni: 0.75wt%, B: 0.02wt%, and the balance is Zn.

[0041] The preparation steps of this embodiment are:

[0042] 1) Smelting: first put the electrolytic plate into the furnace, after the electrolytic plate is melted, increase the voltage to 600V, cover the liquid surface with charcoal, the covering height is more than 5mm, and the temperature reaches 1100℃~1150℃, metal aluminum, manganese, silicon , lead are added into the copper water in turn, stirred after melting, the voltage is raised to 400V, the temperature is lowered to 980 ° C ~ 1020 ° C, zinc is added to the copper water, and the temperature is kept for 3 minutes after melting. The copper-phosphorus alloy (the mass content of phosphorus is 7%), Copper-calcium alloy (the mass content of calcium is 10%) and metal nickel are added into the copper liquid with a pressure spo...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/02C22F1/08
CPCC22C9/04C22C1/02C22F1/08Y02P10/20
Inventor 欧阳好舒孟洋
Owner JINTIAN COPPER GROUP CORP NINGBO
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