| According to the alloy in the larger content of the main metal and the classification of the name of a certain alloy, such as copper content of copper alloy, its performance mainly to maintain the performance of copper. Alloy type (1) a mixture alloy (eutectic mixture), when the liquid alloy solidification, the composition of the composition of the alloy were made of alloy, such as solder, bismuth and cadmium alloy; (2) solid melt alloy, when the liquid alloy solidification to form solid solution of the alloy, such as gold and silver alloy; (3) metal interchangeable alloys, alloys each forming compounds with each other, brass (β-brass, γ-brass and ε-brass) composed of copper and zinc. Many of the properties of the alloy are better than pure metal, so most of the application materials in the alloy (see ferroalloy, stainless steel). The nature of the alloy All types of alloys have the following properties: (1) the melting point of most alloys is lower than the melting point of any of the constituent metals; (2) hardness is generally greater than the hardness of any of its components; (exception: sodium potassium alloy is liquid, for the atomic reactor in the thermal agent) (3) alloy conductivity and thermal conductivity is lower than any component metal. The use of this feature of the alloy, can produce high resistance and high thermal resistance materials. But also the manufacture of special properties of the material. (4) some corrosion resistance (such as stainless steel) such as iron in the incorporation of 15% chromium and 9% nickel to get a corrosion-resistant stainless steel, suitable for the chemical industry |
