Abstract
The demands of size and quality of large steel shaft forgings for ship building, power plant, steel plant, etc. are rapidly increasing, and some of these products are manufactured from ingot weighing more than 300 tons. According to the increase of ingot size, micro- and macrosegregation and also mass effect of the product increase. Thus, special care should be paid to the heat treatment of such large shaft forgings.
In this report, the fundamental matters of heat treatment of large shaft forgings are briefly described, and some mechanical test results, internal properties of products, residual stresses are also discussed.
