Casting solidification analysis method, casting method, and electronic program
OwnerHaruki Itofuji, Yutaka Miyamotoinventors
Life of this patent
Estimating the term…
Abstract
A casting solidification analysis method, which can analyze positions of shrinkage cavities more accurately than in the past, a casting method using the above method, and an electronic program are provided. A following casting solidification analysis method is provided. An amount of expansion/shrinkage for each solidification step length separated by inflection points in a cooling curve is determined, by setting a solid phase ratio at a completion of pouring to 0, setting a solid phase ratio at an end of solidification to 1.0, and determining the expansion/shrinkage amount for the each solidification step length by proportionally distributing the each solidification step length to the total solid phase ratio length.
Claims5
A casting metal solidification process, comprising determining an amount of expansion/shrinkage for each solidification step length of said casting metal solidification process separated by inflection points in a cooling curve, wherein said determining comprises:
- a. setting a solid phase ratio at a completion of pouring to 0,
- b. setting a solid phase ratio at an end of solidification to 1.0, and
- c. determining the expansion/shrinkage amount for the each solidification step length by proportionally distributing the each solidification step length to total solidification phase ratio length,
- wherein expansion/shrinkage is calculated separately for each of the following casting stages:
- liquid shrinkage, primary crystal reaction, eutectic reaction, and shrinkage of austenite between eutectic cells,
- and wherein said determining enables said metal solidification process to be performed without requiring a riser.
An electronic program, comprising:
- (a) a step of determining (i) inflection points from a cooling curve of a casting solidification method and (ii) each solidification step length separated by the inflection points;
- and (b) a step of setting to 0 a solid phase ratio at a completion of pouring, setting to 1.0 a solid phase ratio at an end of solidification, and determining an expansion/shrinkage amount for the each solidification step length by proportionally distributing the each solidification step length to total solidification phase ratio length, wherein expansion/shrinkage is calculated separately for each of the following casting stages:
- liquid shrinkage, primary crystal reaction, eutectic reaction, and shrinkage of austenite between eutectic cells,
- and wherein said electronic program enables said casting solidification method to be performed without requiring a riser.
Dependencies are inferred from the claim text.