product news/產ռ新聞
friability characteristics and therefore reduces the potential incidence of filter related defects in the casting. Te new STELEX ZR ULTRA filters are available in coarse and fine porosities. Te intention is that STELEX ZR ULTRA 10 (the coarse porosity) will provide a filter that consistently primes and provides reproducible perfor- mance in terms of metal flow rate and capacity before filter blockage. STELEX ZR ULTRA 15 (the fine porosity) will provide enhanced filtration efficiency where required and will be particularly well suited to high specification, high integrity, high alloy casting applications. A major European steel casting facility has assisted Fo-
seco by evaluating the STELEX ZR ULTRA product and providing feedback on the performance. Tis steel caster is now using high volumes of STELEX ZR ULTRA 15 on a production basis. Te customer produces high alloy steel parts for the
automotive sector, particularly exhaust manifolds, turbo- charger housings and combinations of both. Tese castings must meet extremely high quality specifications and will be scrapped for inclusions smaller than 0.04 in. (1 mm) in size. On a particular casting, the steel casting facility was using 2.95x 2.95 x 0.98-in. (75x75x25-mm) 10ppi zirconia foam filters but was still seeing a reject rate of over 2% for a com- bination of slag defects and filter particles due to friability. Te facility previously had tried to use finer filters, but these had not been accepted because they introduced metal pour- ing and flow associated problems. STELEX ZR ULTRA filters provide benefits such as: 1. Reduced potential for flow related defects including
consistent capacity and flow rates of metal through the filter and improved priming through less metal chill as the filter primes. 2. Potential for enhanced casting cleanliness. Metalcasters
can use finer filters with molten steel where previously this had not been possible. Te filters also improve efficiency and the potential for a higher level of turbulence control, reduce the possibility of metal bypassing the filter and reduce the potential for filter inclusions in the casting. ■
ՊՕ是ش、םङ隙孔֘滤过'8:2; 新型9:+2+> @8 期初֨，是点特ङ @8 ;2:8' >+2+:9ङם隙孔。ङ 量流չ速流ङ液ً金ङ֘滤过经流，ӹФ塞堵֘滤过չ @8 ;2:8' Օ按需求提 >+2+:9ङش隙孔。定६持ґ 供较高ङ过滤效率，并特Ӱ适用й较高ङ要求չ一ਚ性 ङ高合金铸ў。 >+2+:9ث՛Ҹॠבक़助帮Џѣ钢铸洲欧ङդऽ؟一
@8 ;2:8'фս进੧дછџ，并提供д性ਈՆ馈Ғ息。 @8 ;2:8' >+2+:9д用҅量ם已Џѣ钢铸؟这，֨现 фս。
થ客户О汽车੧Џ生ф高合金钢铸ў，尤ҿ是排气
满须必ў铸п这。ў合ৈङৱиՃљ֘Թ增轮涡、管ح OT йش有խў铸ਙ甚，求要格ઁ量ૅङ高常非足 。ս废Оંੴ都物杂צङ SS ^ 用҅Џѣ钢铸થ，ӹ此，ў铸定特п某ث ^ ^ SS VVOङ氧化锆泡沫陶瓷
^ OT
滤过չ陷缺渣צङਚح۱性ॊ易ҿйं是Ѹ，֘滤过 过ङূ更用֣҅ડ曾Џѣથ。 微ট，废ս率ё超过 ֜，题问ङҼबঈ速流չ注浇д生фե用҅是Ѹ，֘滤 。用采ӱ得有没֘滤过ङ样这，此 ：有点ѩङוӀ۱֘滤过'8:2; 9:+2+> @8 ङ֘滤过过流，陷缺ङҼ有流液ً金Њङ֨潜صӗ
ङ液ً金ङ֘滤过过流صӗ，定६速流չ量流ङ液ً金 。率ҭ填高提৲ђ，降Јچ温 过ङ孔ূرלਈЏѣ造铸。چӔ洁ङ液ً金高提֨潜 д高提还֘滤过。ङਈՕЉ是ӹљ֨这，液钢й用应֘滤 Օङ֘滤过ӱ流ӣ液ً金дѺ降，力潜ङ流紊Ӳ控չ效ਈ ■ 。性ਈՕङૅ杂滤过生фИў铸дصӗ并，性ਈ
A major European facility reduced scrap rates for its automotive steel castings when using the new filters.
Џѣ洲欧ङդऽ؟一 ，ե֘滤过型新用采 降Ѻд合金钢汽车铸 ўङ废ս率。
March 2016
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 73
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