| 摘要 |
PCT No. PCT/FR81/00005 Sec. 371 Date Jul. 30, 1981 Sec. 102(e) Date Jul. 30, 1981 PCT Filed Jan. 14, 1981 PCT Pub. No. WO81/01973 PCT Pub. Date Jul. 23, 1981.The invention concerns a method of selective crack removal from ingots and slabs, and the torch for carrying out the method. The method comprises burning surface impurities with a jet of oxygen, the strength and shape of which vary continually according to the characteristics of the defect to be removed. The torch for carrying out the method has an oxygen nozzle which is divided into a plurality of parallel pipes, the supply of gas to the pipes being controlled individually. The method allows cracks to be removed economically and rapidly from metallurgical products such as ingots and slabs. |
