Solidification cracking prediction method, casting method using the same, solidification cracking prediction device, and solidification cracking prediction program

摘要

PPROBLEM TO BE SOLVED: To provide a solidification cracking prediction method for predicting difficulty/easiness of solidification cracking when the casting of an Al alloy made of desired alloy components is subjected to semi-continuous casting by a vertical type direct water-cooled system. PSOLUTION: The method includes: an input step S1; a first calculation step S2 where calculation of a temperature variation ΔTii based on (formula 1) and calculation of a difference ΔR based on (formula 2) are performed, a second calculation step S3 where relation among the calculated difference ΔR, the calculated temperature variation ΔTii and the casting velocity v is calculated on the basis of (formula 3); a prediction step S4 where, in the case the relation among the calculated difference ΔR, the temperature variation ΔTii and the casting velocity v satisfies the following (formula 3), it is predicted that solidification cracking is hard to occur; and an output step S5. Formula 1: ΔTi=(TSBFsL/SB-TSBFsH/SB)×ä(FsL-FsH)/0.2}. Formula 2: ΔR=[δT/δfs]SBfs=FsL/SB-[δT/δfs]SBfs=FsH/SB. Formula 3: ΔR/ΔTii1,020×ΔTii/vSP2/SP. In the formulae, δ denotes a partial differential symbol. PCOPYRIGHT: (C)2011,JPO&INPIT