| 摘要 |
Shots made from a zinc-based alloy is provided, wherein no risk for explosion caused by powder dusts exists. They achieve a high performance in deflashing and grinding and cleaning by shot blasting and a high ability to create a high compressive residual stress. The lost amounts of them by shooting are small. The shots are made from a zinc-based alloy that contains three components that include A1 of 0.5 to 6.5 mass % and Cu of 0.5 to 4.5 mass % as additional elements, or that contains four components that further include Mg of 0.01 to 0.2 mass % as additional elements, wherein the ratio of the mass of A1 to Cu (A1/Cu) is 1.0 to 13.0, wherein the total amount of A1 and Cu (A1+Cu) is 1.5 to 10.5 mass %, and wherein the Vickers hardness of the shots is 90 to 190 HV. |
