高速度鋼の水鈍

概要

論文の詳細を見る
Furnace-cooling is a standard practice for annealing high-speed steels. It constitutes, however, a bottle-neck to production because of a long time required for the operation. To expedite and simplify the operation, the authors conducted many experiments. Earlier, stepped annealing or isothermal annealing had been found effective. This time, effectiveness of water annealing was confirmed. The experimental results testify that : 1. Water annealing with the heating temperature 800℃ held for 120mn. will effectively soften quenched high-speed steels with more rapidity and simplicity. The softened degree falls certainly short of complete annealing but comes up well to the hardness obtainable through machining. 2. Five to six times of water annealing operations will ensure softening if the following cycle is repeated : water cooling after rapid heating is applied and the heat is held for a brief time. Oil annealing should be recommended for the works of large dimensions or complicated contours.
社団法人日本鉄鋼協会の論文
1955-11-01