Free-cutting brass alloy material and preparation method thereof

Abstract

A free-cutting brass alloy material comprises the chemical elements in percent by mass: 0.5-0.9% of Si, 16.5-17.9% of Zn, 0.15-0.19% of As, 0.08-0.10% of Sb, 0.06-0.09% of Ho, and the balance Cu. Because of contained Si, Sb and Ho elements, the alloy is good in cutting performance, good in electric conductivity and corrosion resistance, safe, nontoxic and harmless; and by reasonably controlling the processing temperature after casting and taking waste copper as a raw material, the hardness of the core part and the hardness of the surface are basically consistent, and the alloy quality is uniform and stable. An employed refining agent is used for casting production, is capable of reducing the porosity degree of a casting by 1-2 degree and enabling the oxide inclusions to be around second grade, and helps to obviously improve the yield.

Description

technical field

[0001] The invention relates to the field of manufacturing metal alloy materials, in particular to a free-cutting brass alloy material and a preparation method thereof. Background technique

[0002] Copper is widely used because of its good electrical conductivity, plasticity and corrosion resistance. Adding elements such as aluminum, nickel, manganese, tin, silicon, and lead to copper alloy can improve the performance of copper and be used in different places. At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending The processing performance is poor and it is easy to break; the quality is heavy and the construction is difficult; it cannot meet the market requirements. ...

Examples

Embodiment Construction

[0013] A free-cutting brass alloy material, which contains chemical elements and mass percentages: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper margin.

[0014] The production method of described free-cutting brass alloy material is:

[0015] (1) Prepare pure copper and scrap copper as the source of copper matrix in a ratio of 1:0.6, add pure copper into the furnace to melt, remove impurities, deoxidize, use refining agent for one-time refining, add alloy components for alloying, and then add Scrap copper melting, adding refining agent for secondary refining, testing and adjusting the content of chemical elements to pass, casting, post-casting heat treatment, etc.;

[0016] (2) The batch order of alloying elements into the furnace during the alloying process is: (1) Zinc; (2) As, Silicon; (3) Other remaining components; the time interval between each batch of elements is 23 minutes , Stir evenly after feeding.

[0017] The post-casting heat...

technical field

[0001] The invention relates to the field of manufacturing metal alloy materials, in particular to a free-cutting brass alloy material and a preparation method thereof. Background technique

[0002] Copper is widely used because of its good electrical conductivity, plasticity and corrosion resistance. Adding elements such as aluminum, nickel, manganese, tin, silicon, and lead to copper alloy can improve the performance of copper and be used in different places. At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending The processing performance is poor and it is easy to break; the quality is heavy and the construction is difficult; it cannot meet the market requirements. ...

Examples

Embodiment Construction

[0013] A free-cutting brass alloy material, which contains chemical elements and mass percentages: silicon 0.5-0.9, zinc 16.5-17.9, As0.15-0.19, Sb0.08-0.10, Ho0.06-0.09, copper margin.

[0014] The production method of described free-cutting brass alloy material is:

[0015] (1) Prepare pure copper and scrap copper as the source of copper matrix in a ratio of 1:0.6, add pure copper into the furnace to melt, remove impurities, deoxidize, use refining agent for one-time refining, add alloy components for alloying, and then add Scrap copper melting, adding refining agent for secondary refining, testing and adjusting the content of chemical elements to pass, casting, post-casting heat treatment, etc.;

[0016] (2) The batch order of alloying elements into the furnace during the alloying process is: (1) Zinc; (2) As, Silicon; (3) Other remaining components; the time interval between each batch of elements is 23 minutes , Stir evenly after feeding.

[0017] The post-casting heat...