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中空钢材是采矿用凿岩机的主要部件材料。过去几年来,中空钢材的生产有了很大发展,但在采矿工业高速度发展的形势下,中空钢材却显得远远不能适应矿山开采的需要。因此,目前增产中空钢材对矿山开采工作的持续大跃进具有重大意义。过去生产中空钢材,是先将钢锭钻成孔,插入芯材,然后加热,再轧成所需要的尺寸,最后抽出芯材,经过精整才成中空钢材。采用这种工艺生产,效率很低。以后采
Hollow steel is a major component of mining rock drills. In the past few years, great progress has been made in the production of hollow steel products. However, under the situation of the rapid development of the mining industry, hollow steel products are far from meeting the needs of mining. Therefore, the current production of hollow steel mining continued the great leap forward is of great significance. In the past, hollow steel was produced by first drilling a steel ingot into a hole, inserting the core material, heating it, rolling it to the required size, finally withdrawing the core material, and finishing it to become a hollow steel material. Produced by this process, the efficiency is very low. After mining