The solder of laser drill rod in medical apparatus and instruments
- Time:
- Click:133
- source:KAPLOWITZ CNC Machining
75 tile, part scanning rate and scanning distance at the same time adjust in 0.
1 millimeter of 2 – / second and 1 – 2.
Between 5 millimeter. Laziness is enraged in the freeboard purity argon that flows into fixture undertake laser joins in the environment. Appearance of welding line geometry pursues 3 revealed use the typical contact that receives craft to form from body laser beam welding. Tell on whole, contact surface is very clean, without the clear evidence of occurrence hole or crackle. Did not discover tinsel is large-scale be out of shape, during making clear treatment, base material did not appear to fuse considerably. Graph 4 be along Y-Z plane the optical micrograph that tastes likewise after transverse section. Observe clean interface hole few or without hole, without crackle, without evidence of interfacial connection half-baked. Contact itself faces tinsel center the narrowest, along coping and bottom surface wider. Nextpage composition analysis is in what NiTi-SS interface carries out to quantify chart of ray of energy dispersion X with different deepness in illuminate surface (EDS) the curve refers to 5c of graph 5a –. The join area between composition of metal of two kinds of base material displayed the mixture between Fe, Cr, Ni and Ti. This limits of mixture area indicated the breadth of contact. This kind of specific sample shows contact width limits is about between 5 – 25 µm. Appearance makes clear different composition curve to solder differently the mechanism holds dominant along the different area of contact. The fused layer ply that faces laser illuminate surface is bigger, show fused duration is longer, can enter dilute of more stainless steel fused NiTi. Observe the fusion of two kinds of data that face tinsel center is the smallest, fuse layer ply can be reduced considerably. The composition curve of this area is similar to diffusion control craft, but superstratum is similar to be based on fused join mechanism. Graph 5 still indicate contact breadth considerably the dimension of focusing of beam of light under 400µm, because this affirms the mechanism that contact forms is not laser light beam,fuse directly, the quantity of heat that needs however accumulates. Graph 6a and 6b showed use the joint that forms from craft of solder of body laser drill rod to rupture composition graph of the surface, among them gules, green and blue represent Fe, Ni and Ti respectively. Two rupture the surface basically is green and blue, the extent that demonstrates to Ni and Ti are contained a lot ofinside contact appears rupture. The surface is certainly in contact and the ration of composition measures quantity general to rupture is not some is planted in material. The extent that basically shows red states SS tinsel joins not complete or rupture. Observe not complete join of the interface with constant power scanning rate is function. When laser scanning rate increases, enter the integral energy of tinsel to reduce, because this has the effect that reduce fused layer thickness or removes fused layer, cause those who enclothe whole interface is fused inadequate. Contact intensity is heterogeneous the ideal connect intensity between material is to exceed inferior base material intensity. After producing great plasticity to be out of shape, stainless steel tinsel arises about of 280 Mpa bring to bear on laden, rupture when load is close to 560 Mpa. Sample of NiTi super flexibility appears at first flexibility is out of shape, till stress level reachs phase of the metal when 470 Mpa,change martensite from austenite. After laden stability, observe appear another linear and stretch area, bring to bear on stress is adjacent 1.
5Observe when Gpa rupture. Graph 7 show use the model that joins from body laser craft joins observe through the electron microscope when sample to rupture the surface. Exterior configuration states accurate dissension ruptures, as above, believe to rupture be in contact and appearing is not base material in. To low scanning rate (highest 1 millimeter / second) experiment, highest connect intensity is achieved about 275 MPa. Although this strength is great,approximate stainless steel succumb stress, but, did not observe before rupturing in stainless steel tinsel can feel plasticity to be out of shape. The higher rate that begins recently and power (8 watt-hour are as high as 2 millimeter / second) the experiment has shown fracture stress exceeds 470 MPa. People believes to raise scanning rate to be able to make quantity of heat more local change and accumulate, with lesser fused pool is being formed in shorter duration, because this brings about base material between mix reduce and be formed between the metal and evolution process decreases. The article investigated conclusion the facial expression of photograph of two kinds of biology that laser of new link craft is using at medical treatment equipment to apply from solder of body drill rod is formed between material NiTi and stainless steel 316L without seam head. The intensity of stainless steel base material is adjacent during contact shows tensile test succumb stress, rupture exterior existence allows dissension to rupture. Experimental result shows recently rupture intensity adds prep above stainless steel further succumb the degree of stress. The EDS graph of cross section indicates contact breadth considerably under diameter of incident laser light beam, because quantity of heat accumulates,make clear and form fused pool. Achieved contact intensity makes clear, laser from solder of body drill rod it is to form NiTi and stainless steel photograph of these two kinds of biology contains heterogeneous material between one kind of firm connect feasible the method with foreground light, need not use fill data, can apply to other extensively very quickly in stuff of didymous and heterogeneous metal. CNC Milling CNC Machining