A high strength steel for mining machinery is composed of C:0.22-0.49%, Si:0.90-1.70%, P:0.002-0.080%, S:0.001-0.045%, mo:1.00-2.40%, Cu:0.05-0.50%, V:0.01-1.30%, Al:0.020-0.180%, O:1-20*10_6 and other impurities which are inevitable. The invention develops a kind of high strength steel suitable for cutting teeth of roadheader, meets the requirements of new type of roadheader, solves the technical problems of large consumption of cutting teeth and low cutting efficiency of traditional roadheader, improves its service life and working reliability, as well as cutting efficiency of hard rock roadheader, greatly reduces cutting loss and production shutdown time, and greatly improves coal production. Benefits are well adapted to the needs of construction and development of high-yield and high-efficiency mines. The cutting gear consumption of the roadheader manufactured by the steel of the invention is reduced by more than 50%, and the economic benefit of the coal mine is remarkably improved.
【技术实现步骤摘要】
一种高强度矿山机械用钢及其制造方法
本专利技术属于合金结构钢
,具体涉及一种高强度矿山机械用钢及其制造方法。
技术介绍
掘进机是煤矿井下巷道铁路和隧道施工的掘进设备。破碎煤岩等硬质物的工作机构截割头是其重要部件之一,掘进机工作时截齿会承受高的压应力、剪切应力和冲击负荷,煤岩中还含有硬的矿料如煤矸石等,会受到很大的冲击并且在采煤和凿岩过程中截齿还有升温问题,导致齿顶材质软化加速了截齿的失效过程。CN101899624A公开了一种高碳低合金大规格锻造矿用耐磨钢球及其生产方法,该耐磨钢球包含H≤1.5ppm以及下述质量百分比组分:、Si0.20~0.40、Mn0.90~1.00、P≤0.020、S≤0.020、Cr0.90~1.00、Ni0.05~0.15、Mo0.06~0.15、Al0.020~0.050、Cu0.1~0.25;本生产方法包括将上述热轧圆钢加热至1050~1150℃,保温后剪切成料段、锻造成磨球;待磨球锻后强冷至室温,再重新加热、保温一定时间后出炉;待达到淬火温度时入水淬火,再配以低温回火;本耐磨钢球的直径从125~160mm,其表面硬度可达HR ...
【技术保护点】
1.一种高强度矿山机械用钢,其特征在于,其组成按重量百分数为:C:0.22~0.49%、Si:0.90~1.70%、P:0.002~0.080%、S:0.001~0.045%、mo:1.00~2.40%、Cu:0.05~0.50%、V:0.01~1.30%、Al:0.020~0.180%、O:1~20×10‑6余为Fe和不可避免的杂质。
【技术特征摘要】
1.一种高强度矿山机械用钢,其特征在于,其组成按重量百分数为:C:0.22~0.49%、Si:0.90~1.70%、P:0.002~0.080%、S:0.001~0.045%、mo:1.00~2.40%、Cu:0.05~0.50%、V:0.01~1.30%、Al:0.020~0.180%、O:1~20×10-6余为Fe和不可避免的杂质。2.如权利要求1所述的高强度矿山机械用钢,其特征在于,所述矿山机械用钢的强度≥1500MPa,更优选1200~3000MPa。所述矿山机械用钢的韧性≥70J/cm2,更优选60~120J/cm2。3.如权利要求1~1任一项所述的高强度矿山机械用钢的制备方法,包括...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。