| 摘要 |
The present invention relates to a high-temperature forming limit diagram evaluation method for a steel plate which comprises: a step of coating the steel plate formed with a grid using liquefied grease and a lubricant releasing agent, and heating in a heating furnace; and a step of placing the heated steel plate in a mold, and pressing so as to transform the steel plate and measure grid transformation. In the present invention, by protecting the grid in the heating furnace using the liquefied grease and the lubricant releasing agent, the grid can maintain a clear condition, thereby measuring high-temperature forming limit diagram of a cold rolled plate with high accuracy. |
