| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of crack due to rust which may be generated on a water cooling hole without labor and with materials in necessary minimum.SOLUTION: The mold crack generation prevention method is characterized in that a projection material formed of chemical elements whose ionization tendency is higher than that of iron is projected to a water cooling hole for water cooling formed on a mold such as a die-casting mold and a forging mold, for bonding part of the projection material to the surface of the water cooling hole. In addition, the projection material preferably contains one or more kinds selected from zinc, aluminum, magnesium, and titanium. |
