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钎钢是凿岩用钎杆及其素材中空钢的总称。广泛用于矿山、铁道、农田水利、战备工程等的凿岩作业。钎杆在凿岩过程中受到凿岩机1800～2300次/分的高频冲击,每次冲击功在6公斤一米以上;受到160～250次/分的旋转所产生的120公斤.米的扭矩。钎杆的内孔凿岩时通以3～6公斤/厘米~2压力水捕尘和排出岩粉,所以在承受上述应力的同时还受到水的腐蚀。有关资料报导22毫米六角钎杆的平均轴向应力3公斤/毫米~2,最大扭转应力1.17公斤/毫米~2,弯曲应力34.9公斤/毫米~2,最大张应力(合成应力值)73.5公斤/毫米~2,(1)(2)由此看出。钎杆是一种受力复杂、经常在超过疲劳极限下运转、而且还有腐蚀及恶劣条件下工作的工具。国外研究者认为:“中空钢的使用条件是十分苛刻的,因此,它的寿命一般在30分
Brazing steel is a general term for hollow rods made of rock drill and its material. Widely used in mining, railways, farmland water conservancy, combat readiness and other drilling operations. Drill rod in the rock drilling process by drilling machine 1800 ~ 2300 / min high-frequency impact, each impact energy of 6 kg more than a meter; subject to 160 ~ 250 beats / min of the rotation produced by the 120 kilograms of torque. Drill hole drilling through 3 ~ 6 kg / cm ~ 2 pressure water to catch dust and discharge rock powder, so bear the stress while also subject to water corrosion. The data reported 22 mm hexagonal drill rod average axial stress of 3 kg / mm ~ 2, the maximum torsional stress of 1.17 kg / mm ~ 2, bending stress 34.9 kg / mm ~ 2, the maximum tensile stress (synthetic stress) 73.5 kg / Mm ~ 2, (1) (2) This shows. Rod is a complex force, often in excess of the fatigue limit of operation, but also corrosion and harsh conditions of work tools. Foreign researchers believe that: "The use of hollow steel is very harsh conditions, therefore, its life expectancy is generally 30 minutes