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Abstract:
Mechanical properties of several kinds of molding sands, which are
often used in production of large scale steel castings, have been
experimentally researched for temperature range 20℃ to 1300℃. Uniaxial
compression stress-strain curves are obtained by a SWX-II molding sand
testing device, from which deformation modulus, strength of the molding
sands at different temperature or viscosity of the molding sands when
they soften are calculated. By means of measuring destroy angles of sand
specimens, the angles of internal friction of the molding sands are
obtained, and then cohesive strength of the molding sanding is
calculated. According to the experimental results, a stress-strain model
of the molding sands is presented.
Key words: 型砂 力学性能 应力-应变
Received
198812, received in revised form 198906
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