AN INVESTIGATION OF THERMAL AND MECHANICAL STABILITY OF MOLD MATERIALS FOR STEEL CASTINGS.
Interim technical rept., 27 Jun 64-30 Jun 65.
CASE INST OF TECH CLEVELAND OHIO DEPT OF METALLURGY
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A test apparatus was developed to measure the tensile strength of molding materials at elevated temperatures. The measurements of tensile strength obtained from this equipment permits a qualitative evaluation of the ability of a mold to maintain casting dimensions. Several rammed mold materials consisting of various combinations of refractory aggregates and binders were investigated for use in producing high quality steel castings. The aggregates selected for study included mullite, zircon, silica sand, fused silica, olivine, and calcined alumina. These were bonded with western bentonite and sodium silicate. Close dimensional control was obtained with all aggregates bonded with sodium silicate and with the zircon and mullite aggregates bonded with western bentonite. The casting surfaces obtained with the fused silica and zircon were generally superior to those produced in other aggregates. Author
- Ceramics, Refractories and Glass
- Metallurgy and Metallography