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 Wysłany: Śro 9:08, 22 Gru 2010 Temat postu: ugg stivali Die steel microstructure and propertie |
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Die steel microstructure and properties of laser cladding
Into W3B code, in addition to alloy phase 5Ni185B6. As the project wear short time,[link widoczny dla zalogowanych], the first part of wear and tear is Zhigan area, and Zhigan area organizations to (a Ni, basically when you are not close to joining tungsten carbide, so the same conditions by adding tungsten carbide wear after little change in wear resistance, the more wear-resistant properties have not yet demonstrated. It can be predicted, with the wear time, the increase of cycle wear, worn surface Zhigan area under the sample in the dendrite and the friction surface contact, due to the presence of second phase particles W3.cn8B3 and sub-surface has the highest hardness, tungsten carbide cladding powder will be added to show better wear resistance. laser cladding will result in increased surface roughness, So in practice, the cladding on the surface after a mechanical process to improve the surface finish. Thus, not only has the highest hardness of the sub-surface exposed, but also allows a large number of tungsten Zhigan area of the second phase particle in work surface, thereby enabling the cladding layer has the best wear resistance and thus improve the life of the product.: z: 2 roar B; U: jjB6; S: 7 A Ni; �� cladding layer of a map 10RW51 x-ray diffraction spectrum Fig.10XRDspeem ~ ofRW51claddinglayer3 Conclusion 1) single-channel cladding, in the other parameters unchanged, with the laser power increases, the depth of cladding layer to increase rapidly, but the power of Head 1300W, the depth increases very slowly almost reached the limits of the depth; multi lap cladding,[link widoczny dla zalogowanych], the warm surface of the cladding can improve the uniformity of the depth of cladding layer, while the addition of WC powder cladding cladding will increase the depth of the inhomogeneity: 2) In this experiment, the laser cladding, the surface hardness is improved, the hardness peak in the sub-surface, up to 923Hv02,[link widoczny dla zalogowanych], mainly through solid solution strengthening, grain refinement and the second phase particle strengthening the cladding layer, etc. hardness. WC as the full melting, not the WC phase in the form of particles, so the hardness of cladding layer was not obvious; 3) compared with the matrix material, the surface after laser cladding has greatly improved wear resistance and improve the range of 1.91 ~ 4.24 times that can be achieved, after which the organizational structure and cladding the hardness of the surface state has a direct link; the wear characteristics of the adhesive wear and abrasive wear; 4) crystal plane of laser cladding layer and branches Taiwan crystalline eutectic mixture,[link widoczny dla zalogowanych], which Zhigan area is (a Ni, the distribution of dendritic w32Cr | 8 and 5NilB5B6 second phase particles such as it is these second phase particles on the surface hardness and wear resistance played a major role. References: [1] Liu long. Laser Cladding Research J] powder metallurgy technology, 1998,3:209 ~ 212 [2] Tony Parker and laser surface melting CuCrS0 powder metallurgy materials [J]. Application Laser, 1999. 5:253 ~ 255 [3] Zhang Di. Cladding on high beam current situation and development trend of [J]. Laser Technology ,[link widoczny dla zalogowanych],2001,1:39-42 .14 JBa head stare stare, M.ere. CcoIlofprc ~ essp and coral plate of Xu sforlaserallo ~ andclad blood J] JournalofLRs ~ rApphcafiottsvl0rtl1998: 29 ~ 33 [5] Pan Qingyue. based on artificial neural network genetic algorithm for a stainless steel laser surface melting process optimization [A_. China Engineering Proceedings Institute of Physics Science Foundation of China (Ji-3), 1999:252 ~ 253. [6] Yeung Sum laser rapid solidification of A1 Mn Taijin organizational choice of a law of [J_. Materials Science and Technology, 200o, 2:82 ~ 86 [7] Zhao Haiou. laser cladding characteristics and sensitivity of the crack [J] Metals. 2001,1:18 ~ 21.8] Guan Zhen. Laser Processing Manual [M]. Beijing: China Metrology Publishing community. 1998. [9] Tang Shouchun laser cladding of aluminum Taijin c / metal-based rehabilitation units and properties of coatings [J_. using laser .1999 (5): 201 ~ 205 [1O] Delin metal mechanical beam performance [M] Beijing: Mechanical Industry Press, 1987. [t1] Liu town. laser surface cladding layer of abrasion and erosion of the instance of the [A] Fourth National Conference on Laser Processing Proceedings, 1997:53 -56.12] Jiajun red. Fe-C Taijin surface cladding system of the particle coating of reinforced composites [J] laser, 1999.5:198 200. (edit Huang dxJI1]
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