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Metal Casting Technologies : March 2008
45 METAL Casting Technologies March 2008 Fig 6.Example of output from the WD spectrometer using four different diffracting crystals. LiF crystal is used for short wavelength R-rays and PBST for long wavelengths. Measurement of relative intensity under each peak enables quantitative analysis REFERENCES: 1. J.T.H. Pearce. "Materials Characterisation -- Which Technique Should We Use?" METAL Casting Technologies (2004) v50 pp. 22-26. 2. G. Lawes. "Scanning Electron Microscopy and X-Ray Microanalysis". John Wiley & Sons, 1987. 3. J.T.H. Pearce. "Stainless Steel Casting -- Heat Treatment Stops the Rot". METAL Casting Technologies (2003) v49 p26-32. PACIFIC RIM FOUNDRY SERVICES Exclusive Representative for Mancuso Chemicals (Canada) in Australia and Southeast Asia Chemical Binder Systems State of the Art Technology at Competitive Prices Furane Resins and Catalysts Phenolic Urethane No-Bake Binders Phenolic Urethane Cold-Box Binders PACIFIC RIM CASTING & PATTERNMAKING SUPPLIES Marketing consumable products for the casting and patternmaking industries in New South Wales. Specialising in epoxies, urethanes and adhesives PACIFIC RIM SAFETY PRODUCTS Marketing safety products from: Paramount Safety, Elliott Australia, Protective Industrial Products, Defender Safety, Australian Safety, Bacou Dalloz, Livingstone International. Safety Equipment Leather Gloves,Cotton Gloves, Terry Cord Gloves, Welding Gloves & Aprons, Ear plugs, Safety Glasses, Respiratory Masks, Furnace Clothing, High Visibility Clothing, Disposable Overalls, Work Jackets, Safety Boots & Shoes PACIFIC RIM FOUNDRY EQUIPMENT Buying and Selling Second Hand Foundry Equipment Foundry Equipment Asset Liquidations Pacific Rim Foundry Services -- Pacific Rim Casting & Patternmaking Supplies Pacific Rim Safety Products -- Pacific Rim Foundry Equipment Tel: 61 2 8883 2997 Fax: 61 2 8883 2895 Mobile 0419 433 238 Email:firstname.lastname@example.org heat treatment of castings, and if castings are exposed to elevated temperatures in service. Figure 5 demonstrates the way in which elemental distribution in the austenite and ferrite phases, and also in the small non-metallic inclusions present, can be readily visualized. For quantitative analysis at a given position in the microstructure, the output from the WD spectrometer is used. Each diffraction peak is identified automatically as seen the example given in Figure 6. This shows the sets of diffraction peaks from each of four different diffracting crystals used in the spectrometer to illustrate how the operator can select crystals to give best differentiation between peaks from each element. ●