Hunan Terry New Materials Company Ltd.

Hunan Terry New Materialsco., Ltd.

Xin Jin

Jinsong Huang

Bin Liu

Wei Li

Zhongling Zhang

Shun Li

Ziyang Gan

A method for preparing metal powder by water atomization is disclosed. The method includes the steps of smelting, atomization, separation and drying, and the metal powder is freeze-dried in the drying step. Experiments show that freeze-drying is an important factor affecting oxygen content indexes of copper and copper alloys, and can be applied to the preparation of copper and copper alloy powder and even metal powder with low oxygen content. The method further considers all the details that may cause oxidation during the atomization process, and takes comprehensive measures to greatly reduce the probability of oxidization of copper and copper alloy powder, so that the oxygen content and oxidation of the water atomized powder are effectively reduced, and the water atomized powder is not easy to be oxidized during long-term storage.

Method for preparing metal powder by water atomization

Oxide dispersion-strengthened alloy (ODS), lead-free and free-cutting brass and producing method thereof. The mass percent of components in the brass are: 52.0%-90.0% of copper, 0.001%-0.99% of phosphorus, 0.15%-0.70% of tin, 0.25%-3.0% of manganese, 0.15%-0.90% of aluminum, 0.10%-1.5% of nickel, 0.191%-0.90% of oxygen, and 0.06%-0.80% of carbon, the ratio of aluminum to oxygen not exceeding 27:24, with the balance being zinc and inevitable impurities, wherein lead is not more than 0.08%. The brass is produced by a powder metallurgy method: brass powder, copper oxide powder, and graphite micro powder are mixed evenly; 0.001%-1.5% of a forming agent is added and mixed evenly with the mixture; and then molded by compression, and sintering are performed before post-treatment.

Oxide dispersion-strengthened alloy (ODS), lead-free and free-cutting brass and producing method thereof

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Hunan, China

Xin Jin