The Closeness Of Metal Alloys

       The development of human civilization and the progress of society are closely related to metal materials. After the Stone Age, the Bronze Age, the iron, all with the application of metal materials for its era of marked signs. Modern, a wide range of metal materials has become an important material basis for the development of human society.Metal Alloys

       Types of metal are usually divided into ferrous metals, non-ferrous metals and special metal materials. Ferrous metal also known as steel materials, including iron more than 90% of the industrial pure iron, carbon-containing $number cast iron, carbon steel containing less than 2%, as well as a variety of uses of structural steel, stainless steel, heat-resisting metal, high-temperature alloy, precision alloy and so on. Metal Alloys

       The generalized ferrous metal also includes chromium, manganese and its alloys. Nonferrous metals are all metals and their alloys except iron, chromium and manganese, usually divided into light metals, heavy metals, precious metals, semi metals, rare metals and rare earth metals. The strength and hardness of nonferrous alloys are generally higher than that of pure metal, and the resistance is large and the resistance temperature coefficient is small.Metal Alloys

       Special metal materials include structural metallic materials and functional metal materials of different uses. Among them, the amorphous metal materials obtained by the rapid condensation process, as well as the Quasi crystal, microcrystalline, nanocrystalline metal materials, and other special functional alloys, such as stealth, hydrogen-resistant, superconducting, shape memory, wear-resisting, vibration damping, and metal matrix composites.Metal Alloys

       In order to ensure the safety of steel structures, the quality of welded joints is very important. The toughness of metallic materials is closely related to microstructure. Generally speaking, the finer the microstructure, the better the toughness. As a result of the study of microstructure of fine weld metal, the technique of grain internal phase transformation with tiny inclusions as nucleus was studied. Metal Alloys

       As with the rolling steel, the welding metal is affected by the deformation of the phase and the rapid cooling of the water cooled, and in order to solve this problem, the technology of the phase transformation which is cleverly controlled by the phase transition in the grain is studied.Metal Alloys