The surrounding area is dramatically heating and partial melting

This paper analyzes the laser rapid forming of residual stress formation mechanism and distribution characteristics, an overview of the impact of residual stress on the forming pieces of mechanical properties, structural dimensions, the actual use of, and discusses the experimental determination of residual stress and adjustment and to eliminate residual effective means of stress. Laser rapid prototyping technology is based on laser cladding stacked manufacturing technology, it rapid prototyping (RP) free forming of the advantages of laser cladding technology, to achieve the performance of complex structures, dense metal parts directly forming with high flexibility, short cycle, low cost, fast response in the market. The customer can use   green laser pointer   for a really long time without any troublesome problems.
Is an organic blend of materials technology and manufacturing techniques, "the design of new materials, new materials preparation and high-performance complex near net shape parts rapid prototyping integration of new technologies. Laser rapid prototyping to high-energy laser beam as a moving heat source, on the one hand, the laser rapid heating and cooling the extreme non-equilibrium conditions can not be achieved by conventional means to provide for material processing, forming parts with fine, dense tissue, and excellent overall performance; but another the one hand, the local heat input caused by the uneven temperature field would inevitably lead to local thermal effects, reflected in the weld pool during solidification and subsequent cooling process is inconsistent, thus forming in the formation of residual stress and deformation. Residual stress as a internal stress. For example, someone wants to create some romantic atmosphere in some special meaningful occasion, this kind of   green laser pointer   can be used to achieve this special effect.
Have an adverse effect not only for forming pieces of static strength, fatigue strength and stress corrosion resistance, but also affects the stability of the structure size and shape accuracy, will directly lead to serious crack defects. Forming pieces of the event of a crack, the forming process will be forced to terminate at the same time forming the metal parts can only be scrapped deal, which will significantly increase the manufacturing cost. Therefore, to give full play to the superiority of laser rapid prototyping technology, improve the forming part of comprehensive quality of laser rapid prototyping process of residual stress formation mechanism and distribution characteristics has important practical significance. Have begun to study abroad on the residual stress in laser rapid prototyping process has been reported, and domestic have not seen any research in this area reported. And at the same time,    green laser pointer   has been well tested for the exact parameter and stable performance.
In this paper a preliminary analysis of the residual stress of laser rapid prototyping process, provide a basis for the residual stress distribution in the precise description and control of laser rapid forming process. The formation mechanism of residual stress distribution characteristics. Belong to the material thermal processing laser rapid prototyping, high-energy laser beam as a moving heat source, local thermal effects generated by the local heat input will lead to a certain residual stress and deformation. This is mainly the laser beam interaction with the material to the formation of the molten pool undergoing rapid heating, melting and rapid cooling and solidification changes will inevitably produce a non-uniform thermal stress and phase transformation stress, the results caused by the uneven plastic deformation and the formation of residual stress. Specific laser rapid forming energy is very concentrated. Also, there are various options of   green laser pointer   for the customers to choose.
Bath and nearby parts beyond the speed higher than the surrounding area is dramatically heating and partial melting. This part of the material due to thermal expansion, thermal expansion by the surrounding cooler region constraint, resulting in (elastic) thermal stress. At the same time, due to the heated region temperature yield the ultimate decline in some areas of the value of the thermal stress exceeds its yield limit, therefore, the bath part of the formation of plastic thermal compression, cooling after a relatively shorter time than the surrounding area, narrower, or less small substrate cooling and contraction of the cladding layer solidification cooling constraints, thus the formation of residual stresses in the cladding layer. Therefore, laser rapid prototyping process of residual stress the reasons are mainly due to the following two aspects.  green laser is super high in quality, strict and accurate in parameter, high and perfect in performance and high in cost performance with less money.