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Mold surface of plasma treatment

Large cooling get great depth of hardened layer, but the current exceeds 90A, the cylinder surface by the micro-melting to melting, this time in Sichuan and other ion beam erosion under the molten metal masterpiece splash occurred,[link widoczny dla zalogowanych], culminating in the formation of convex cylinder surface uneven, damaged surface quality. The current range of commonly used 60-85A,[link widoczny dla zalogowanych], depth of hardened layer is O. 1 () ~ 0.20rami. Ji Tomb of potato power arsenic, Figure 4 hardened layer depth and the current relationship between a nozzle at the L diameter of plasma hardened layer depth and width of measured the plasma nozzle aperture when the plasma quenching inch, hardened layer of the breadth and depth of Table 1. Two experiments, when the jet diameter is 2.0mm L of plasma quenching when the width and depth of the largest and walk around the mouth aperture parameter is 1, Smm second time, when the nozzle diameter is 3. O hardened layer depth minimum. Table 1, the plasma nozzle diameter hardened layer depth and width of the first group (current I = 80A】 section: Group current = 95A) St (mm) 152O3. O1.52O3. O Children (mm) 27830219O3. O636O2.71 Children (mm) O14O17O. 03O16O21O11 In general, the smaller the nozzle diameter, the compression effect on the arc, but the nozzle diameter is not no I ~ Ed,. This is due to the high temperature plasma spoon, a great expansion of its internal force,[link widoczny dla zalogowanych], the force of the arc column with the increasing of Chicago, when the expansion is greater than the internal efficiency of mechanical compression effect of shrinking income, after effect and magnetic plasma arc will undermine the maximum energy, then the plasma arc is not burning through the spinning nozzle larvae L 2006.No.1 / 2 Total 58/59 of the mouth.'s largest energy and nozzle area ratio L larvae called the maximum energy density. In the experiment, As a result of higher current (80A and 95A), while the smaller diameter nozzle when the nozzle of the burning occurs, such as the nozzle in this experiment was 1.5, the nozzle burning occurs, affecting plasma hardened the depth and width. Thus, the current in the larger plasma surface hardening hardening, the nozzle diameter is 2.0mm, L larvae of the group's best tracks, the best hole in the quenching of the hardened layer depth maximum width of the widest. 4 Conclusion 4.1 quenched transform completely, clear boundary with the matrix; 4.2 devices to the mold by plasma surface hardening, high hardness can be obtained at the same time, little distortion; 4.3 The process can be carried out on the simple shape of the mold surface treatment, treatment cost is lower. Reference 1 Cui Hongzhi + ions quench zone of change in Cambodia and features, engine parts, 2000,42 Yinhua Yue .27 SiMn plasma surface treatment of steel, Shandong Mining Institute , 13 No. 4,[link widoczny dla zalogowanych], 1994, i2, 3 Cui Hongzhi,[link widoczny dla zalogowanych], Yin Huayue. Pressure Plasma Surface Hardening Cylinder Cambodia technology, mechanical engineering material, 2001,1, TheResearchofPlasmaDisposalforDieSurfaceZhao-JianbolCui-hongzhi2Sun-HaiYang2Zhang-Ying21, ShanDongUniversityofScienceandTechnology266510WenDengElectricMotorFactory264400tract: Surfacemodificationistheidealtechnologyforordinorydiematerialbyequitablematerialselecting.Surfacequenchingisusedbytheorsfordiesurfacebybeam-plasmawithhighenergydensity.Goodhardeningresultsareachievedandthedeformationislittle.Thistechnoloallbeintroducedintobatchdietreatmentwithsimpleshape.Words: Plasma, Die. SurfaceModification, SurfaceHardening, Costing59

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