易切削结构钢机械性能,易切削结构钢的特点、性能

('高速切削的钢种。常用改善切削加工性的元素有S、Pb、Ca、等，其中以S最常用，S在钢中形成MnS夹杂，MnS很脆，属于优质钢。易切削结构钢用作生产标准件如小型螺丝、螺母、油泵、手表、计算机、打字机零件、机床光杠、丝杠等牌号力学性能布氏硬度HB抗拉强度бbN/mm伸长率%不小于钢材尺寸，mm8-2020-3030Y12530-755510-735490-6857.0152-217Y12Pb530-755510-735490-6857.0152-217Y15530-755510-735490-6857.0152-217Y15Pb530-755510-735490-6857.0152-217Y20570-785530-745510-7057.0167-217Y30600-825560-765540-7356.0174-223Y35625-845590-785570-7656.0176-229Y45Ca695-920655-855635-8356.0196-225种专用产品，有些钢牌号和优质碳素结构钢相同，如专门生产油桶板的08、10、08Al供镀锡、锌、铅的原板。但大部结构用铸造碳素钢，予应力及混凝土钢筋用优质非合金钢、焊条用钢、花纹钢板、非合金调质钢、非合金表而硬化钢、和纯洁度）的非合金钢。性能和切削加工性，价格便宜，唯一不足的是淬透性低。其牌号由“碳”的汉语拼音字头（T）加数字组成，数字表示碳序号牌号化学成分CMnSiSP不大于1T70.65-0.74≤0.40≤0.350.0300.0352T80.75-0.843T8Mn0.80-0.900.40-0.604T90.85-0.94≤0.405T100.95-1.046T111.05-1.147T121.15-1.248T131.25-1.35牌号退火状态试样淬火硬度值HB不大于压痕直径，mm不小于淬火温度，°C和冷却剂硬度值HRC不小于T71874.40800-820水62T8780-800水T8MnT91924.35760-780水T101974.30T112074.20T12T132174.10震动与冲击载荷的工具，如凿子、打铁用模、各种锤子、木工工具等；T9（T9A）由于含碳量较高，故硬度、耐磨性较高求较高且不受突然和剧烈冲愚味震动而需要一定韧性及具有锋利刀口的各种工具，如车刀、刨刀、钻头、板牙、铣刀、钢，如为保证军工需要的航空用钢、兵器用钢、核压力容器用非合金钢；保证某种热处理需要的、保证淬透性钢、非合合金电工钢，具有规定磁性能的非合金软磁材料、原料纯铁等。产品系列分类执行标准牌号化学成分(%)CSiMnPSPb低碳快削钢LowcarbonfreecuttingsteelGB国家标准Y120.08/0.160.15/0.350.70/1.000.08/0.150.10/0.20Y12Pb0.08/0.16≤0.150.70/1.1000.05/0.100.15/0.250.15/0.35Y150.10/0.18≤0.150.80/1.200.05/0.100.23/0.33Y15Pb0.10/0.18≤0.150.80/1.200.05/0.100.23/0.330.15/0.35ENDIN欧洲德国标准11SMnPb30≤0.14≤0.050.90/1.30≤0.110.27/0.330.20/0.3511SMn37≤0.14≤0.051.00/1.50≤0.110.34/0.4011SMnPb37≤0.14≤0.051.00/1.50≤0.110.34/0.400.20/0.3510SPb200.07/0.13≤0.400.70/1.10≤0.060.15/0.250.20/0.35AISI美国标准1215≤0.090.75/1.050.04/0.090.26/0.3512L14≤0.150.85/1.150.04/0.090.26/0.350.15/0.3512L15≤0.090.75/1.050.04/0.090.26/0.350.15/0.35JIS日本标准SUM23≤0.090.75/1.050.04/0.090.26/0.35SUM23L≤0.090.75/1.050.04/0.090.26/0.350.10/0.35SUM24L≤0.150.85/1.150.04/0.090.26/0.350.10/0.35SUM25≤0.150.90/1.400.07/0.120.30/0.40中碳GBY40Mn0.37/0.450.15/0.351.20/1.55≤0.050.20/0.30快削钢MediumcarbonGBYF40MnV0.37/0.440.30/0.601.00/1.50≤0.0350.035/0.075V:0.06~0.13EN/DIN46S200.42/0.50≤0.400.70/1.10≤0.060.15/0.25AISI11440.40/0.481.35/1.65≤0.040.24/0.33JISSUM430.40/0.481.35/1.65≤0.0400.24/0.33',)