基本信息
标准简介
标准目录
中文样稿
Specifications for heat treatment hardness of automobile parts 1 Subject content and application scope This standard specifies the specifications for heat treatment hardness of automobile parts. This standard is applicable to the final heat treatment of automobile parts. 2 Heat treatment hardness of common materials for automobile parts as specified in Table 1 Table 1 Heat treatment Process Material Hardness specifications Application examples HB HRC HV Carburization 08 and 20 50~55 58~63 Valve tappet, camshaft, piston pin, washer, baffle, etc. 15Cr, 20Cr, 20Mn, 20CrMnTi, 20CrMn, 20CrNiMo, 12CrNi3, 20CrNi3, 20MnVB, 20Mn2TiB, 20CrMnMo and 20CrMo 58~63 Camshaft, piston pin, starting gear, steering nut, ball pin, rocker shaft, leaf spring pin, universal joint, universal joint pin, etc. (Soft) nitridation 40 and 45 400~600 600~800 Odometer gear, timing gear and oil pump transmission gear HT 200, HY 250 and HT 350 400~600 600~800 Timing gear and oil pump transmission gear 38CrMoAl and Cr12MoV 800~1,000 Carbonitriding B2F and B3 08, 10, 15, 20, Y12 and Y15 40~45 48~53 53~58 58~63 ≥500 Clutch driven plate, hand-operated toothed plate, transmission fork, carburetor rocker arm, rocker shaft, steering lever ball seat, hand-operated shoe bracing plate, ball pin seat, extra-thick nut, spherical strut, etc. ML10, ML15, ML20 and ML35 43~48 48~53 53~58 58~63 Worm, screw, bolt, pump diaphragm ejector rod and adjusting mechanism body 35 and 40 35~40 40~45 ≥650 Locating pin, washer, driven disc, etc. 15Cr, 20Cr, 20CrMnTi and 12Cr2Ni4A 48~53 53~58 58~63 Rocker shaft, valve tappet, worm and gear sleeve 40Cr and 40MnB 53~58 58~63 ≥650 Steering worm and locating pin Induction quenching Normalized state 25, carburized part 25, 40 and 45 40~48 48~56 56~63 Door latch, swing arm shaft, camshaft, transmission fork shaft, crankshaft, etc. ZG 310-570, HT 200, HT 150, QT 600-2 and QT 900-5 48~53 53~58 58~63 Release yoke, separate bearing sleeve, gear shaft, transmission shaft flange, crankshaft, etc. Quenched and tempered state 35, 40 and 45 48~53 53~58 58~63 Master gear flange plate, ball pin seat, gear shaft, transmission shaft, etc. 40Cr and 40MnB 48~53 53~58 58~63 Spline shaft, crankshaft, gear shaft, transmission shaft flange, camshaft, etc. 30CrMo, 35CrMo, 30CrMoSiA, 42CrMo, 35CrMnSiA and 40CrMnMo 48~53 53~58 58~63 Flywheel ring gear, steering knuckle, crankshaft, half shaft, etc. Quenching and tempering 35, 40, 45, 50, ML35, ML45, ZG 270-500 and ZG 310-570 207~241 255~285 285~321 341~415 30~35 35~40 40~45 45~50 Clutch driven disc hub, locking nut, fastening bolt, threaded fork, locating pin, hand-operated shoe rocker arm and slack adjuster arm 15, 20, 15MnVB, 16Mn, 15Cr and 20Cr 35~42 42~48 48~55 55~63 Thrust ring, washer, bolt and wedge-shaped lock pin 35CR, 40Cr, 45Cr, ML40Cr, 40CrMnMo and 40CrNiMoVA 255~285 285~321 341~415 30~35 35~40 40~45 45~50 Column bolt, rear lifting lug shaft, rear axle shaft, key pin, etc. 30CrMo, 35CrMo and 42CrMo 207~241 255-285 30~35 35~40 40~45 45~50 Crankshaft and connecting rod Y40Mn, 45Mn and 45Mn2 207~241 255~285 33~38 38~42 42~48 Bolt, pin, torsion bar, half shaft sleeve, etc. 40MnB and 45MnB 255~285 285~312 30~35 35~40 Screw 85 52~58 Valve block 65Mn 37~42 42~48 48~53 Push rod joint ball collar, elastic collar, leaf spring, valve spring, valve block, etc. 55Si2Mn, 60Si2Mn and 55SiMnVB 42~48 Spring steel wire, plate spring, etc Normalizing 35, 40, 45, 35Cr, 40Cr, 40MnB and 40CrMnMo 197~241 241~285 Crankshaft 45Mn2 207~285 QT 600-2, QT 700-2 and QT 900-5 240~321 Crankshaft Notes: ① The harness specified in the table refers to the surface hardness of the parts, and the core hardness shall meet those specified in the relevant technical documents. ② In order to facilitate inspection, the hardness value in a certain unit may be converted to that in another unit, provided that it meet the inspection rules of relevant standards.
1 Subject content and application scope 2 Heat treatment hardness of common materials for automobile parts as specified in Table Additional explanation
中华人民共和国汽车行业标准 QC/T 276—1999 代替ZB/T 06 003—85 汽车零件热处理硬度规范 国家机械工业局1999-03-15批准 1999-03-15实施 1 主题内容与适用范围 本标准规定了汽车零件的热处理硬度规范。 本标准适用于汽车零件的最终热处理。 2 汽车零件的常用材料热处理硬度接表1规定 表1 热处理 工艺 材料 硬度规范 应用举例 HB HRC HV 渗碳 08、20 50~55 58~63 气门挺杆、凸轮轴、活塞销、垫圈、挡片等 15Cr、20Cr、20Mn、 20CrMnTi、20CrMn、 20CrNiMo、12CrNi3、 20CrNi3、20MnVB、 20Mn2TiB、20CrMnMo、 20CrMo 58~63 凸轮轴、活塞销、起动齿轮、转向螺母、球销、摇臂轴、钢板弹簧销、万向节、十字轴等 (软)氮化 40、45 400~600 600~800 里程表齿轮、正时齿轮、机油泵传动齿轮 HT 200、HY 250、HT350 400~600 600~800 正时齿轮、机油泵传动齿轮 38CrMoAl、Cr12MoV 800~1000 碳氮共渗 B2F、B2 08、10 15、20 Y12、Y15 40~45 48~53 53~58 58~63 ≥500 离合器从动盘、手制动齿板、变速叉、化油器挥臂、摇臂轴、转向杆球座、手制动蹄撑板、球销座、特厚螺母、球形支柱等 M1.10、M1.15、ML20、ML35 43~48 48~53 53~58 58~63 蜗杆、螺钉、螺栓、泵膜顶杆、调整机构本体 35、40 35~40 40~45 ≥650 定位销、垫圈、从动盘等 15Cr、20Cr、 20CrMnTi、12Cr2Ni4A 48~53 53~58 58~63 摇臂轴、气门挺杆、蜗杆、齿轮齿套 40Cr、40MnB 53~58 58~63 ≥650 转向器球面蜗杆、定位销 感应淬火 正火态 25、渗碳件25、40、45 40~48 48~56 56~63 门锁舌、止摆臂轴、凸轮轴、变速换档叉轴、曲轴等 ZG310—570、HT200、 HT150、QT600—2 QT900—5 48~53 53~58 58~63 分离叉、分离轴承套简、齿轮轴、传动轴凸缘、曲轴等 调质态 35、40、45 48~53 53~58 58~63 主齿法兰盘、球销座、齿轮轴、传动轴等 40Cr、40MnB 48~53 53~58 58~63 花键轴、曲轴、齿轮轴、传动轴凸缘、凸轮轴等 30CrMo、35CrMo、 30CrMoSiA、42CrMo、 35CrMnSiA、40CrMnMo 48~53 53~58 58~63 飞轮齿圈、转向节、曲轴、半轴等 调查 35、40、45、50、ML35、 ML45、ZG270—500、 ZG310—570 207~241 255~285 285~321 341~415 30~35 35~40 40~45 45~50 离合器从动盘毂、锁止螺母、紧固螺栓、螺纹叉、定位销、手制动蹄摇臂、制动调整臂 15、20、15MnVB、16Mn、 15Cr、20Cr 35~42 42~48 48~55 55~63 止推环、垫圈、螺栓、楔形锁销 35CR、40Cr、45Cr、 ML40Cr、40CrMnMo、 40CrNiMoVA 255~285 285~321 341~415 30~35 35~40 40~45 45~50 柱螺栓、后吊耳轴、后桥半轴、键销等 35CrMo、35CrMo、 42CrMo 207~241 255~285 30~35 35~40 40~45 45~50 曲轴、连杆 Y40Mn、45Mn、45Mn2 207~241 255~285 33~38 38~42 42~48 螺栓、销、扭杆、半轴套筒等 40MnB、45MnB 255~285 285~312 30~35 35~40 螺钉 85 52~58 阀片 65Mn 37~42 42~48 48~53 推杆接头球卡圈、弹性挡圈、弹簧片、气门弹簧、阀片等 55SI2Mn、60Si2Mn、 55SiMnVB 42~48 弹簧钢丝、钢板弹簧等 正火 35、40、45、35Cr、40Cr、 40MnB、40CrMnMo 197~241 241~285 曲轴 45Mn2 207~285 QT600—2、QT700—2、 QT900—5 240~321 曲轴 注意 ① 表中固定的是零件的表面硬度,心部硬度按有关技术文件规定。 ②为了便于检验,允许将一种硬度单位换算成其它硬度单位检验,但应符合有关标准的检验规则。 附加说明: 本标准由国家机械工业局提出。 本标准由全国汽车标准化技术委员会归口。