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Grain refiner of environment-friendly brass and preparation and using method of grain refiner

A grain refiner and brass technology, which is applied to the grain refiner of environmentally friendly brass and the fields of its preparation and use, can solve the problems of not mentioning the degree of grain refinement and the effect, etc., so as to improve the resistance to The effect of oxidizing ability, convenient use and simple preparation process

Active Publication Date: 2017-09-15
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN201510714013 discloses a silicon brass alloy and its preparation method and application, which regulates the phase composition and distribution state of the alloy by adding B and Ti composite grain refiners, but does not mention the degree and effect on grain refinement Effect

Method used

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  • Grain refiner of environment-friendly brass and preparation and using method of grain refiner
  • Grain refiner of environment-friendly brass and preparation and using method of grain refiner
  • Grain refiner of environment-friendly brass and preparation and using method of grain refiner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select Al-Sr alloy 38wt%, Zr12wt%, Al-B alloy 35wt%, Al-Fe alloy 5wt%, NaAlF67wt%, CaCO3 3wt%, prepare grain refiner according to the above ratio, powder raw material Fully uniform, and then packaged with copper foil.

[0029] Carry out environmentally friendly silicon brass smelting in a 2-ton industrial frequency induction furnace. First, the aluminum-iron alloy is melted together with the copper. After the copper water composition is tested and passed, the temperature of the copper water is controlled at 1050 ° C ~ 1070 ° C, and the refiner is added. The amount of the copper added is 0.03% of the total amount of copper water. After the addition, it is artificially stirred for 3 to 5 minutes, and finally stands still for 5 to 10 minutes. The temperature starts to cast when the temperature is 1050 to 1060 ° C.

[0030] After using the refiner, the silicon brass grains are greatly refined, and the grain size is reduced from 70 μm to 35 μm, which effectively improves the...

Embodiment 2

[0032] Select Al-Sr alloy 36 wt %, Zr14 wt %, Al-B alloy 35 wt %, Al-Fe alloy 5 wt %, NaAlF6 6 wt %, CaCO3 4 wt %, and prepare grain refiner in proportion. The powdered raw materials are fully uniform, and then packaged with copper foil.

[0033] Silicon brass is smelted in a 2-ton industrial frequency induction furnace. First, the aluminum-iron alloy is melted together with red copper. After the copper water composition is qualified, the temperature of the copper water is controlled at 1050 ° C ~ 1070 ° C, and 0.03% of the total amount of copper water is added. After adding the chemical agent, manually stir for 3-5 minutes, and finally stand still for 5-10 minutes, and start casting when the temperature is 1050-1060 °C.

[0034] After using the refiner, the silicon brass grains are greatly refined, and the grain size is reduced from 70 μm to 30 μm, which effectively improves the fluidity of the molten metal, makes the inclusions evenly distributed, and the product surface qua...

Embodiment 3

[0036] Select Al-Sr alloy 36 wt %, Zr15 wt %, Al-B alloy 33 wt %, Al-Fe alloy 5.5 wt %, NaAlF67.5 wt %, CaCO3 3 wt %, and prepare grain refiner in proportion The chemical powder raw materials are fully uniform, and then packaged with copper foil.

[0037] Environmentally-friendly polished tin-copper ingots are smelted in a 2-ton industrial frequency induction furnace. After the copper water composition is tested and passed, the temperature of the copper water is controlled at 1050°C to 1070°C, and the amount of refining agent added is 0.04% of the total amount of copper water. . After adding, manually stir for 3-5 minutes, and finally stand still for 5-10 minutes, and start casting when the temperature is 1050-1060 °C.

[0038] After using the refiner, the silicon brass grains are greatly refined, and the grain size is reduced from 60 μm to 30 μm, which effectively improves the fluidity of the molten metal, makes the inclusions evenly distributed, and the product surface qual...

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Abstract

Provided is a grain refiner of environment-friendly brass and a preparation and using method of the grain refiner. The grain refiner of the environment-friendly brass comprises, by weight, 36-38% of Al-Sr alloy, 33-35% of Al-B alloy, 12-15% of Zr, 5-8.5% of Al-Fe alloy, 6-7.5% of NaAlF6, 3-4% of CaCO3 and the balance unavoidable impurities. The preparation technology of the grain refiner is simple, environmental protection and non-pollution are achieved, the using effect is obvious, and the liquidity of molten metal is improved after the molten metal is used, so that the sizes of grains of the environment-friendly brass can be reduced from original 70-100 micron to 30-50 micron; and the surface of a finished product is smoother and finer, and the flatness, the finish degree and the surface anti-oxidant ability are improved after the finished product is polished.

Description

technical field [0001] The invention relates to an environment-friendly brass refiner and a preparation and use method thereof, and is particularly suitable for an environment-friendly silicon brass grain refiner and a preparation and use method thereof. Background technique [0002] Lead brass has extremely high machinability, excellent cold and hot casting performance, is easy to cut, and the surface of the processed workpiece is smooth and clean. It is widely used in electronic telecommunications, home appliances, aviation, hardware ornaments and sanitary plumbing products. Lead exists in solid solution as a free element. When it comes into contact with people, soil, and water sources, lead will enter the water and nature, causing harm to the environment and having a great impact on human health. In order to meet the requirements of environmental protection, some environmentally friendly brass products that replace lead brass have emerged as the times require, such as sil...

Claims

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Application Information

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IPC IPC(8): C22C1/06C22C1/03C22C9/04
CPCC22C1/03C22C1/06C22C9/04
Inventor 欧阳好傅杰巢国辉
Owner JINTIAN COPPER GROUP CORP NINGBO