论文部分内容阅读
钢质磨球是选矿厂大宗消耗件。我矿一次磨机每年要消耗直径127毫米的锻钢球一万多吨,价值600多万元,是一个大有潜力可挖的项目。以前我们所用的钢多为 A3钢,这种钢含碳量极低,不进行热处理。1982年以来陆续改为含碳量较高的钢种,主要有25SiMn、20MnV、B5等。这些钢含碳量多在0.3%左右。实践表明钢球经锻后余热淬火,表面硬度约可比正火状态的提高一倍左右,达到
Steel ball mill is a large consumable parts consumption. One mine mill consumes more than 10,000 tons of forged steel balls with a diameter of 127 mm every year, worth more than 6 million yuan. It is a great potential project to dig. In the past we used steel mostly A3 steel, this steel contains very low carbon content, without heat treatment. Since 1982, one after another has been changed to higher carbon steel grades, mainly 25SiMn, 20MnV, B5 and so on. The carbon content of these steel is about 0.3%. Practice shows that the ball after quenching forging quenching, surface hardness can be about twice the normalized state to achieve