Influence of trace elements on phosphocopper

Phosphor copper in the process of processing and refining, with trace elements into the inevitable, because of the infiltration of the trace elements in the phosphor copper, trace solution, a large number of the solubility of the solid solution is infinite, has a low temperature and intense, the solubility of solid composite variables to reduce and not solid solution, and so on, so the impact on the performance of the phosphor copper is different. The elements are now introduced to affect the properties of copper, respectively.

The behavior of copper hydroxide is the main body under study, and copper does not form hydrogen hydride, in liquid and solid copper with the increase of temperature, especially large solubility in liquid copper, in the solidification process, pore hydrogen solubility is formed in copper, resulting in brittle and copper from the skin surface; In solid copper, existing in the proton state, hydrogen, S copper layer filled with orbital electron hydrogen atoms, forming a proton-type solid solution, although the performance of hydrogen on copper is not great, but on copper and copper alloy hydrogen is harmful to oxygen containing copper will be in hydrogen annealing, "hydrogen disease", because the cracking of Cu2O + H2, 2CU + H2 O reaction occurs, The steam generated will cause pores and cracks; Different solubility of hydrogen copper the effects of different components, its characteristics is Ni, Mn and as a result of the increased solubility, phosphorus, silicon and other elements, in order to reduce the solubility of hydrogen in copper, by lowering the melting time and so on elements, adjust the composition, control charging hydrogen content, covering the melt surface with charcoal and other means to reduce the copper content of hydrogen.

Oxygen in the production process of phosphocopper alloy is inevitable, the effect is very important, less oxygen dissolved in copper, 1065 ℃ 0.06%, 600 ℃ 0.002% (by weight); Oxygen depolarization of copper is easy to solve less, the expressed form of Cuprous oxide, copper oxide and copper, showing eutectic Cu + Cuprous oxide, distributed at the grain boundary does not form solid solution, eutectic reaction: Oxygen 0.39% 1065 ℃α 0.01% + cuprous oxide, hypoeutectic crystallization amount in copper proportion Accurate determination of oxygen content in copper can be compared with standard images under a microscope.