Accession Number:

AD0656475

Title:

EFFECT OF MOLD-STEEL INTERFACE REACTIONS ON CASTING SURFACE AND PROPERTIES.

Descriptive Note:

Interim rept. 1 Jul 65-30 Sep 66,

Corporate Author:

CASE INST OF TECH CLEVELAND OHIO DEPT OF METALLURGY

Personal Author(s):

• Naro,Rodney L.
• Wallace,John F.

Report Date:

1967-05-24

Pagination or Media Count:

73.0

Abstract:

The research investigated the effect of mold coatings and refractories on the surface quality of cast steel. The influence of surface roughness in reversed bending fatigue was also examined using as-cast specimens of AISI 4330 steel produced in green sand molds coated with hexachlorobenzene, aluminum powder, sodium floroaluminate, and a proprietary mold wash. Plate bending specimens were also produced in uncoated silica, chromite and zircon sand molds and subsequently tested. Test specimens made in both hexachlorobenzene coated silica sand molds and zircon sand produced equivalent results in improving the surface finish of experimental test castings. Bending fatigue test results showed that hexachlorobenzene coated and uncoated zircon provided the greatest overall improvement in fatigue life and endurance limit. The fatigue failures were initiated at cope surfaces with greater frequency than drag surfaces. Author

Descriptors:

• *CASTINGS
• *STEEL
• *MECHANICAL PROPERTIES
• STEEL
• ROUGHNESS
• FRACTOGRAPHY
• SURFACE PROPERTIES
• FATIGUE(MECHANICS)
• TENSILE PROPERTIES
• SILICON DIOXIDE
• ZIRCONIUM OXIDES
• MACHINING
• FINISHES
• MICROSTRUCTURE
• REFRACTORY COATINGS
• STATISTICAL ANALYSIS
• TABLES(DATA)

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE