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Impact of laser hardening effect of the factors. In general, indicators of the laser surface transformation hardening: hardening depth, hardening of the width and hardness. Organization hereditary steel, hardened targets, the high temperature austenitic grain size and distribution. Influence of the hardening index parameters are: laser output power and the absorption rate of the part surface. Spot size, which determines the size of the hardening width. Under the conditions determined in the focusing mirror, the spot size is changed by adjusting the defocus amount (or defocus amount). Set the defocus amount, the spot size is determined. 200mw laser pointer can make their teaching and demonstration more lively and perfect.
Scan rate (laser hardening laser beam relative to the speed of the workpiece). The thermophysical properties of metallic materials, such as thermal conductivity, thermal diffusivity. The chemical composition of materials. The original thermal state of material and organization of the state. The process parameters can also show its impact to the thermal cycling parameters. Laser heat source under the action of a certain process parameters, every point of moving the workpiece experiencing a warming, the highest temperature, and then the cooling process (insulation stage is very short and can be ignored), this process is called thermal cycling. Transformation hardening region of thermal cycling parameters: heating rate, the maximum heating temperature, holding time, cooling rate. The basic principles of heat treatment workers on the state diagram and conventional heat treatment of Fe-of Fe3C phase transformation process are very clear.  green laser pointer can emit the green dot facula.
Laser quenching, the state diagram of the material remains an important theoretical basis. State diagram determines the heating temperature range of the material. However, in so fast laser heating conditions, A1, A3, and ACM lines than conventional heating, the shift magnitude is much greater, and the material at higher temperatures, almost no noticeable grain growth phenomenon also not overheat leaving subsequent quenching organizational performance deteriorated. Therefore, the heating temperature range of laser solid-state phase transition can be much wider. More wide heating temperature range of austenite steel, its solid-state laser surface phase transition to the hardening temperature the more easy to control the implementation of the process parameters is also more easy to deal with the depth of hardened layer can also be more. The working time table of green laser pointer is also contained in the document.
The literature suggests that the carbon steel of solid-state laser transformation hardening the heating temperature range 900 ℃ ~ 1200 ℃ is appropriate. At this time parts of the surface roughness not to change parts of the hardened layer of this depth range from the surface of 1200 ° C to depths of 900 ° C, the heating temperature is much higher than the conventional quenching temperature, but the heating time is very short , the grain is entirely too late to grow up (except when organized genetic phenomenon). Laser energy within hundredths of a second to thousandths of a second or less time, the parts near the surface heating at the temperature quickly rose to above 1000 ℃, heated to high temperature, holding time is extremely short, so the heating condition with conventional heating methods have a great deal of difference. The company has to accomplish all the oversea orders of green laser pointer this month.
The formation of austenite for eutectoid steel, conventional heating rate conditions, the steel is heated to above AC1. Formation of austenite is achieved through nucleation and growth process, the basic process includes: 1) austenite nuclei formed at the interface of ferrite and cementite; 2) the growth of austenite; ) the continuation of the residual cementite dissolution;) austenite homogenization process. Sub-eutectoid steel and over eutectoid steel of austenite formation process and common analysis of steel is essentially similar to, but the increase in excess of the phase transformation and dissolution characteristics have. Figure 2 shows the temperature cooling transformation C curve (TTT diagram) and the continuous cooling transformation C curve (CCT diagram) merger schematic. A new warehouse of green laser pointer is under the construction.