Common copper boron alloy, copper manganese alloy, phosphorus copper alloy, magnesium copper alloy and so on why to melt first. There are many kinds of copper alloy, common copper boron alloy, copper manganese alloy, phosphorus copper alloy, magnesium copper alloy and so on.
Tin bronze plate has the characteristics of fast production rate, high production quality and low cost of electrical materials. Therefore, there are obvious advantages in the precision production of high speed molds and difficult materials.
1.0000g of the sample was weighed and placed in a 250mL conical flask, 40mL(1+1)HCl and 5-10 mlH2O2 were added, dissolved at low temperature, boiled to remove hydrogen peroxide, and cooled by running water. Transfer to a 250mL volumetric flask, dilute with water to scale, shake well, the solution is the mother liquor. The amount of lead in tin bronze was determined as follows.
Copper oxy-acetylene welding can use wire 201 (or wire 202) welding wire and flux 301. It is preheated by 400~700 before welding, and the welding flame adopts neutral flame and large flame power.
The causes of forging cracks in copper alloys are as follows :(1) defects in the blank or surface; (2) forging temperature is not suitable, low plastic material; (1) Excessive deformation or tensile stress. Ingot surface quality is poor and internal segregation is serious. Therefore, ingot needs to be homogenized and annealed before forging. The forging temperature has great influence on the plasticity of copper alloy. Due to the addition of a large number of alloying elements in copper alloy, the initial forging temperature is low, the forging temperature range is narrow, and there is a medium-temperature brittle zone.
The harmful impurities in tin bronze are aluminum, silicon and magnesium. When their content exceeds 0.005%, the resulting SiO2, MgO and Al2O3 oxide inclusions will pollute the melt and degrade some aspects of the alloy properties.
The smelting method of phospho-copper alloy, in addition to the non-ferrous alloy factory which produces a large number of phospho-copper using "wet smelting", generally adopt the following two typical processes.
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.
