Adopting new heating source and heating method

A new heating source in the new heat source, with high energy heat source is the most conspicuous. High energy heat source mainly include laser beam, electron beam and plasma arc, etc. High energy heat treatment is the use of high energy heat source orientation to impose very high energy density (on workpiece surface 10 3 ～10 8 w/cm 2 ) To achieve fast heating speed ( Even can reach 10 11 ℃ / s) So in a very short period of time ( 1 ~ 10 7) , the workpiece to handle the surface heating to the phase transition temperature above or molten state, physical and chemical changes, and then rely on the workpiece itself surface hardening or solidification cooling implementation, to achieve the aim of surface modification. High energy in heat treatment reduce the workpiece deformation, received a special organization performance and surface state has great superiority, can improve the surface wear resistance, corrosion resistance, prolong its service life. High energy developing rapidly in recent years, heat treatment is the most active field of metal material surface modification, one of the surface modification of laser heat treatment and ion implantation in a foreign country has entered the stage of production. China faw, no. 2, xi 'an, internal combustion engine fittings factory, has established the laser surface hardening of the automobile engine cylinder liner production line, but due to reasons such as high energy heat treatment equipment is expensive, at present our country has not been a large number of applications, but its broad prospects for development, the future will be a promising treatment technology. 2 for less when new way of heating in heat treatment without oxidation heating, is to reduce the loss of metal oxide, the necessary condition to ensure the quality of workpiece surface, and adopts the vacuum and controlled atmosphere is the main way to realize no less oxidation heating. In terms of surface heating induction heating has the advantages of low heating speed and surface oxidation decarbonization, small deformation of small, energy saving, pollution, such as high productivity, easy to realize mechanization and automation, energy-saving means of surface heating is a kind of economy, mainly used for the surface of the workpiece quenching. High-energy heating with heating speed, good surface quality and small deformation, the advantages of low energy consumption, no pollution, is also a very effective way of heating surface. In terms of the overall heating, vacuum heating, high heat, heat flow bed, etc. Heat flow bed while the energy density is not high, but the heat quickly and evenly, workpiece deformation is small, smooth surface, after processing does not need to clean, easy transformation, can improve the quality of the product, energy saving, low pollution, low cost, and can be combined with chemical heat treatment, is a kind of very good heating mode, is suitable for many varieties, small batch and periodic production, can be used to replace traditional salt bath heat treatment, its development prospects.