In our daily life, we will use a lot of metal products. Many metal products are synthetic. The white copper sheet is a copper alloy with nickel as the main alloy and no element. Based on copper-nickel alloys, cupronickel rods with third elements such as zinc, manganese, aluminum, etc. are added, which are correspondingly called zinc cupronickel rods, manganese cupronickel rods, aluminum cupronickel rods, and the like. Cupronickel is divided into five categories: ordinary cupronickel, iron cupronickel, manganese cupronickel, zinc cupronickel and aluminum cupronickel.
Ordinary white copper plate mainly has four alloy grades such as B0.6, B5, B19 and B30. The commonly used ones are B19 and B30, and there are more grades in the American standard. The cupronickel rod is a continuous solid solution formed by Cu and Ni, with a face-centered cubic lattice, as shown in Figure 1-18. When the temperature is lower than 322 degrees, the Cu-Ni phase diagram has a relatively wide composition temperature region for metastable decomposition, adding third elements such as Fe, Cr, Sn, Ti, Co, Si, Al to Cu-Ni alloys etc., can change the composition, temperature range and location of metastable decomposition, and can also improve some properties of the alloy.
Ordinary cupronickel has good cold and hot working properties. It can be smoothly processed into various shapes such as plates, strips, tubes, rods, shapes, and wires. Good welding performance, can be soft, brazing, gas shielded arc welding and resistance welding, etc.; the cutting performance is 20% of that of free-cutting brass HPb63-3.
Ordinary white copper plate has good corrosion resistance, medium strength, high plasticity, can be processed by cold and hot pressure, and good electrical properties. In addition to being used as a structural material, it is also an important high resistance and thermocouple alloy.
Post time: Jul-11-2022