Phosphorus is a chemical element that has deoxidization properties. When copper is melted, oxygen and other gases from the environment and within the processes will get into the molten metal. These gases can make the metal too porous to be worked or will develop cracks when used for certain applications. Phosphorous helps to remove the oxygen and other gases from copper during the melt as it increases the copper’s strength.
As phosphor is added into molten copper, it forms phosphorus pentoxide that results when the phosphor gathers in the oxygen in the copper. This phosphorous pentoxide is then removed when the copper undergoes the refining process. The remaining phosphor ends up in the solution with the copper. Copper alloys that can be made with phosphor include phosphor copper, and phosphor bronzes.
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|Grade list of copper and copper alloys by country|
|oxygen free copper||TU1||2.0076||C10200||C1020R||C103|
|Vacuum oxygen free copper||E-Cu58||TU00||c1020||6N|
|Silver copper||TAg 0.1||CuAg 0.1||C10400||C1040||CuAg 0.1|
|pure copper||TU2||OF-Cu58||C10100||C1011||C101||CW008A||copper oxide|
|T2||SW——copper||C11000||C1100||C101||copper - FRHC|
|TP2||SF-Cu||C12200||C1220||C106||CW024A||copper - DHP|
1. In addition to providing deoxidizing properties, phosphor also provides a range of other benefits. Copper by itself has amazing corrosion resistance, as this property becomes enhanced due to the added phosphor. It also improves tensile strength, removes brittleness characteristics, and improves machinability and workability.
2. Small amounts of phosphor will not impact the natural electrical and thermal conductivity in copper. Yet keep in mind that the more phosphor that is added, the more that the copper conductivity will become depressed. For example, phosphorous deoxidized copper will basically have a copper content of 99.9%. However, this same copper will have a conductivity of only 85% IACS. Certain phosphor bronzes may only have a conductivity ranging between 25% to 50% IACS.
3. Consider the type of application that the copper will be used in and the level of desired conductivity to determine the amount of phosphor that will be necessary. In some cases, the sacrifice in conductivity but the improvement of the copper’s corrosion and strength will be a positive result.
Tin phosphor bronze has higher corrosion resistance, wear resistance and no spark on impact. Used for medium speed, heavy load bearing, maximum working temperature 250℃. It has the characteristics of automatic self-aligning, insensitive to deflection, uniform bearing force, high bearing capacity, radial load at the same time, self-lubricating without maintenance, etc. Tin phosphor bronze is a kind of alloy copper, has good electrical conductivity, not easy to heat, to ensure safety and has a strong fatigue resistance. Tin phosphor bronze socket reed hard wired electrical structure, no rivet connection or friction contact, can ensure good contact, good elasticity, smooth insertion. The alloy has excellent machinability and chip forming property, which can shorten the machining time of parts quickly. As an intermediate alloy, phosphor copper is widely used in copper casting, solder and other fields, and plays an important role in the development of national economy.
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