FREZY TRZPIENIOWE Z WĘGLIKÓW SPIEKANYCH MOULD AND DIE INDUSTRY NORTON WINTER PRECISION TECHNOLOGY TOOL GRINDING / 143 POLISHING RECOMMENDATIONS MATERIAL SPECIMEN PREMACHINING Norton Winter DIAPLAST® AS PASTE OR SUSPENSION POLISHING UNDERLAY NOTES Carbides Stellite Diamond wheel/ foil D126 or D91. D15 D7 D3 D1* 1007 1007 31 31* * Polishing stage may in some cases be dispensed with Ferritic Pearlitic Martensitic Austenitic steels Cast Iron of all types Wet grinding on diamond foil D46 and/or SiC paper to 600 grit D15* D7 D3** D1 D0.25*** 1007 1007 or 31 31** 31 Soft cloth*** * Only for hardened steel ** Can in some cases be dispensed with *** Not required In hard castings and martensitic steels. Intermediate etching with 1 % alcohol. HNO3 before Diaplast ® D1 is advanta- geous Aluminium and aluminium alloys Wet grinding on diamond foil D46 and/or SiC paper to 1000 grit D7 D3 D1 D0.25 1007 or 31 31 31 or cloth soft Soft cloth* Use little pressure * C an in some cases be dispensed with Lead alloys Wet grinding on SiC paper to 1000 grit D3 D1 D0.25 31 31 Soft cloth Use little pressure Samples sensitive to water! Clean only with Alcohol Grinding lubricant: petroleum jelly Copper and copper alloys Wet grinding on diamond foil D46 and/or SiC paper to 1000 grit D7 D3 D1 D0.25* 1007 or 31 31 31 Soft cloth* * For ultra-pure copper or very soft copper alloys, machining with D0.25 can be dispensed with; instead, use alumina on a soft polishing cloth and give a brief second polish Magnesium alloys Wet grinding on SiC paper to 1000 grit D7 D3 D1 D0.25 1007 or 31 31 31 Soft clotht Clean samples with alcohol Nickel and nickel alloys Wet grinding on diamond foil D46 and/or SiC paper to 1000 grit D15 D7 D3 D1 D0.25 1007 1007 or 31 31 31 Soft cloth Silicon and germanium Wet grinding on diamond foil D46 and/or SiC paper to 1000 grit D7 D3 D1 D0.25 1007 31 31 or cloth soft Soft cloth Zinc and zinc alloys Wet grinding on SiC paper to 1000 grit D7 D3 D1 D0.25 1007 or 31 31 31 Soft cloth A brief second polish with alumina 3 on a soft cloth may be required. Rinse with methanol. Intermediate etching with 5 % alcoh. HNO3 before Diaplast® D1 recommended. Use little pressure
RkJQdWJsaXNoZXIy MTM0NjUyNQ==