The surface only in the newspaper a short time (50us-2ms) form a required depth and chemical composition of the surface alloying layer, rapid melting of non-equilibrium solidification process allows alloying elements in the organization to achieve a high after the over-saturation, which form a common alloying compounds are not readily available, a new metastable phase and phase, but also elements in the combined consumption of low Qian case to obtain the surface alloys with specific properties. Because of this alloy layer above the substrate of some performance, so we reached the table and modification purposes. The ODM production ofgreen laser pointerwill be more convenient for some customers.
Laser surface alloying process has been characterized only in the melting zone and the area had little impact on composition, structure and properties change, the thermal effect of the matrix can be reduced to a minimum, causing the deformation is minimal. It can satisfy the need to use the surface, without sacrificing the overall characteristics of the structure. As alloying elements are completely dissolved in the surface, the composition thus obtained is very uniform thin layer of cracking and spalling tendency is not so sensitive. The other notable feature is the use of laser power density is high (104-108 W/cm2). Melting depth by the laser power and exposure time to control, in the base metal surface to form a depth of 0.01 ~ 2mm of the alloy layer. The good picture ofgreen laser pointercan attract more customers to buygreen laser pointer.
As the cooling rate is high, so segregation is extremely small, and the grain refinement effect is remarkable. Laser alloying technique using cheap common materials can be useful for surface abrasion, corrosion, heat and other properties, from the surface can replace expensive overall alloy; and improved stainless steel, aluminum and titanium alloy wear resistance; Preparation of conventional metallurgical methods may not be some special materials, such as superconducting alloy, metal and glass. Surface hardening and ordinary arc and plasma spraying, laser alloying of the following advantages. The description of battery of green laser pointer contains the detailed information.
High concentration of laser radiation energy, can be transported over long distances through the air. Approach is a fast, efficient use of energy. Can accurately control the heating power density and speed, and thus the deformation is small, but hardened and plasma arc spraying uses a non-uniform heating and cooling in the quenching process in thermal shock, resulting in cross-shaped and crack, often requires straightening and polishing process . Make inaccessible areas and local alloying, and the use of the laser depth focus on the parts available in the irregular uniform alloying depth. The shipping description of green laser pointer specifies some specific stipulation.
Based on the above characteristics, laser alloying the metal processing industry gradually began to get a variety of applications. So far for laser alloying the substrate with ordinary carbon steel, alloy steel, stainless steel, cast iron, cobalt and aluminum alloys, alloying elements, including Cr, Ni, W, Ti, Mn, B, V, Co, Mo and so on. Laser alloying process method is generally used in three ways: pre-law materials, hard particle injection at the same time and gas phase alloy method. The more commonly used methods. The use of electro-deposition, vapor deposition, ion implantation, brush, layer remelting, flame and plasma spraying, adhesive coating and other methods will be required prior Xu alloy powder to cover the surface alloying, and laser heating melting, the alloy surface to form a new layer. The detailed information ofgreen laser pointercontains the ordering quantity ofgreen laser pointer.
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