Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators
Consistent mechanical and machining properties are essential in many applications where ductile irons offer the most cost-effective way to produce structural parts. In the production of hydraulic rotators, dimensional tolerances are typically 20 μm to obtain designated performance. For castings wher...
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| Format: | Article |
| Language: | English |
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Foundry Journal Agency
2009-11-01
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| Series: | China Foundry |
| Subjects: | |
| Online Access: | http://www.foundryworld.com/uploadfile/200912443017589.pdf |
| _version_ | 1818640719448899584 |
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| author | Dr. Richard Larker |
| author_facet | Dr. Richard Larker |
| author_sort | Dr. Richard Larker |
| collection | DOAJ |
| description | Consistent mechanical and machining properties are essential in many applications where ductile irons offer the most cost-effective way to produce structural parts. In the production of hydraulic rotators, dimensional tolerances are typically 20 μm to obtain designated performance. For castings where intermediate strength and ductility is required, it is common knowledge that conventional ferritic-pearlitic ductile irons such as ISO 1083/500-7 show large hardness variations. These are mainly caused by the notoriously varying pearlite content, both at different locations within a part and between parts in the same or different batches. Cooling rate variations due to different wall thickness and position in the molding box, as well as varying amounts of pearlite-stabilizing elements, all contribute to detrimental hardness variations. The obvious remedy is to avoid pearlite formation, and instead obtain the necessary mechanical properties by solution strengthening of the ferritic matrix by increasing silicon content to 3.7wt% –3.8wt%. The Swedish development in this fi eld 1998 resulted in a national standardization as SS 140725, followed in 2004 by ISO 1083/JS/500-10. Indexator AB decided 2005 to specify JS/500-10 for all new ductile iron parts and to convert all existing parts. Improvements include reduction by 75% in hardness variations and increase by 30% in cutting tool life, combined with consistently better mechanical properties. |
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| institution | Directory Open Access Journal |
| issn | 1672-6421 |
| language | English |
| last_indexed | 2024-12-16T23:15:44Z |
| publishDate | 2009-11-01 |
| publisher | Foundry Journal Agency |
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| spelling | doaj.art-767eb2fc81b144b48f6aba7ac53a2bc52022-12-21T22:12:19ZengFoundry Journal AgencyChina Foundry1672-64212009-11-0164343351Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotatorsDr. Richard LarkerConsistent mechanical and machining properties are essential in many applications where ductile irons offer the most cost-effective way to produce structural parts. In the production of hydraulic rotators, dimensional tolerances are typically 20 μm to obtain designated performance. For castings where intermediate strength and ductility is required, it is common knowledge that conventional ferritic-pearlitic ductile irons such as ISO 1083/500-7 show large hardness variations. These are mainly caused by the notoriously varying pearlite content, both at different locations within a part and between parts in the same or different batches. Cooling rate variations due to different wall thickness and position in the molding box, as well as varying amounts of pearlite-stabilizing elements, all contribute to detrimental hardness variations. The obvious remedy is to avoid pearlite formation, and instead obtain the necessary mechanical properties by solution strengthening of the ferritic matrix by increasing silicon content to 3.7wt% –3.8wt%. The Swedish development in this fi eld 1998 resulted in a national standardization as SS 140725, followed in 2004 by ISO 1083/JS/500-10. Indexator AB decided 2005 to specify JS/500-10 for all new ductile iron parts and to convert all existing parts. Improvements include reduction by 75% in hardness variations and increase by 30% in cutting tool life, combined with consistently better mechanical properties.http://www.foundryworld.com/uploadfile/200912443017589.pdfferritic ductile ironsferritic-pearlitic ductile ironspropertieshydraulic rotatorssolution strengthening |
| spellingShingle | Dr. Richard Larker Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators China Foundry ferritic ductile irons ferritic-pearlitic ductile irons properties hydraulic rotators solution strengthening |
| title | Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators |
| title_full | Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators |
| title_fullStr | Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators |
| title_full_unstemmed | Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators |
| title_short | Solution strengthened ferritic ductile iron ISO 1083/JS/500-10 provides superior consistent properties in hydraulic rotators |
| title_sort | solution strengthened ferritic ductile iron iso 1083 js 500 10 provides superior consistent properties in hydraulic rotators |
| topic | ferritic ductile irons ferritic-pearlitic ductile irons properties hydraulic rotators solution strengthening |
| url | http://www.foundryworld.com/uploadfile/200912443017589.pdf |
| work_keys_str_mv | AT drrichardlarker solutionstrengthenedferriticductileironiso1083js50010providessuperiorconsistentpropertiesinhydraulicrotators |