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Thermomechanical properties of castable refractories with scaling reSiStent .Steel fiber reinforcement. The lhermomechanical properties of castable refractories can be mproved oy the incorporation of meta IIC fibres. However, the insuifcient oxidation resistance of caroon steel is prohibitive to the ,se at temperatues ever.
below 1000 Cel and even stainless steel fiores cannot oe bsed above this temperatwe 11 s expeded, however, that new high alloy steels (23)(24)(25)(26)(27)(19)(20)(21)(22) wll enable exposure at higher temperatures withobi excessively hign loss of mechanica.
strength. -Pu S. Jaws. 2. Werkstomech. 15 11984) 394-399, Ian German] 85-1550 Erosion of Sintered WC-Co Alloys. l h e elfects 01 WC grain size in Ihe rmye 01 0.9-3 0 pm and Co contents 01 4 5 to 1 1 0 wt ?U on the erosion 01 sin.
tereo WC-Co alloys was lnwestigalad using a sandblaster.type erosion tester employing 240 grit At,O, particles carried In an a!r sfream at vetocitles of 30.100 ms and impact angles 01 20"-90". Limited SEM studies were made of the sur. face damage produced by the erosion. No clear eflnct nf WC gram size on the ero-
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Use of Sintered Calcium Oxide Nozzles in the Continuous Casting of Aluminum-Killed Steel. (Pamphlet). The clogging of lundish nozzles, caused by AI,O,, deposition. IS the main problem in the continuous casting of Al-killed steel Particularly serious problems are to b e expected when the Al con tent
Non-metallic inorganic materials/ Nichtmetallische anorganische Werkstoffe ## 85-1223 High-Temperature Oxidation of NbC and TaC at Low Oxygen Pressures. The oxidation of hot-pressed NbC and TaC was studied between 2000 and 2500K and I O W 5 to t O C 3 mbar oxygen pressure by gravimetric methods.
Lab. studies of the effects of H,S (a potential passivating agent: ZnS solubility product = 6.6 Xr10-2i) in waters contg.NaC1 (activating agent) on the anodic behaviour of T s P l sacrificial Zn anodes as used in tanks and storage vessels a r e reported. In NaCl solutions contg. H,S 50-200 mg/l the