钎杆是凿岩的重要消耗工具品,中空钢是制作钎杆的材料。为了适应高频率大功率新型凿岩机的发展和满足“大打矿山之仗”的需要,在伟大无产阶级文化大革命运动和批林批孔运动的推动下,几年来,我国钎钢有很大的发展。初步建立起了适合我国资源的中碳 Si-Mn-Mo 系统的高强度合金钎钢系统,大 Drill rod is an important tool for drilling products, hollow steel rod material is produced. In order to meet the needs of the development of new high-frequency and high-power rock drill and to meet the need of “fighting the fierce battle of mines”, under the impetus of the great proletarian cultural revolution and the pro-Lin movement, there has been a great development in our country for several years . The initial establishment of a suitable medium-carbon Si-Mn-Mo system for China’s resources of high-strength alloy steel brazing system