钻头用含硫XGML40Cr钢的开发及其切削性能的改善  

Development of Bearing Sulfur Steel XGML40Cr for Drill Bit and Improvement of Its Cutting Performance

作　　者：黄翠环 秦树超 郭明仪 孔维涛 Huang Cuihuan Qin Shuchao Guo Mingyi Kong Weitao(Technology Center, Xingtai Iron and Steel Corp Ltd, Xingtai 054027 Hebei Province Wire Engineering Technical Research Center, Xingtai 054027)

机构地区：[1]邢台钢铁有限责任公司技术中心,邢台054027 [2]河北省线材工程技术研究中心,邢台054027

出　　处：《特殊钢》2017年第4期60-63,共4页Special Steel

摘　　要：邢钢开发的0.020%~0.060%S钻头用XGMI40Cr钢(/%:0.38~0.44C,0.17~0.30Si,0.60~0.80Mn,≤0.035P,0.020~0.060S,0.90~1.10Cr,≤0.01A1)的生产流程为50 t BOF-LF-285 mm×320 mm坯连铸-热轧成Φ12 mm线材。对0.027%S的XGML40Cr和0.006%S的ML40Cr盘条试样进行进刀量0.015 mm/r,切削深度0.1 mm,切削速度12~30 m/min的切削试验。试验结果表明,XGML40Cr断屑性能优于ML40Cr,其切削长度为ML40Cr钢1/5~3/5,XGML40Cr切削过程产生更低的切削热,蓝色切屑比例为10%,ML40Cr钢为70%,XGML40Cr切屑变形系数低于ML40Cr,XGML40Cr表面粗糙度(Ra 10.2μm)优于ML40Cr(Ra 22.4μm)。含硫XGML40Cr钢的力学性能与ML40Cr相当,870℃淬火和500℃回火后的力学性能为抗拉强度1 082 MPa,断面收缩率70%,HRC硬度值40,冲击功A_(KV2)72 J。The production flowsheet of developed 0. 020% - 0. 060% S steel XGMIAOCr （/% ： 0. 38 - O. 44C, O. 17 -0. 30Si, 0.60 -0. 80Mn, 〈-0. 035P, O. 020 -0. 060S, 0. 90 - 1. lOCr, 〈0. O1A1） for drill bit at Xingsteel is 50 t BOF-LF-285 mm x 320 mm bloom casting-hot-rolling to （I）12 mm wire rod. The cutting test on 0. 027% S steel XGML4OCr and 0. 006% S steel ML40Cr with cutting feed rate O. 015 mm/r, depth of cut 0. 1 mm and cutting speed 12 - 30 mm/min has been carried out. Test results show that the cutting performance of steel XGMIAOCr is better than that of steel ML4OCr, i.e. its turning chip length is 1/＇5 - 3/5 that of steel ML40Cr; the heat productivity of steel XGML40Cr during cutting process is lower than that of steel MIAOCr, its blue turning chip ratio is 10% but that of steel ML40Cr is up to 70% ; and the cutting deformation coefficient of steel XGML40Cr is lower than that of steel ML40Cr and its surface roughness （Ra 10. 2 μm） is better than that of steel ML40Cr （Ra 22.4 μm）. The mechanical properties of steel XGML40Cr is about e- qual to that of steel ML4OCr, its mechanical properties quenched at 870 -C and tempered at 500 -C are tensile strength 1 082 MPa, reduction of area 70% , HRC hardness value 40 and impact energy AKV2 72 J.

关 键 词：含硫XGML40Cr钢 切削试验 断屑性能 切屑颜色 切屑变形系数 表面粗糙度 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG713.1[金属学及工艺—金属材料]