推荐回答(4个)
3Cr13属马氏体类型不锈钢,该钢机械加工性能好,经热处理(淬火回火)后,具有优良的耐腐蚀性能抛光性能较高的强度和耐磨性,适宜制造承受高负荷,高耐磨及在腐蚀介质作用下的塑料模具。调质处理后硬度在HRC30以下的3Cr13材料加工性较好,易达到较好的表面质量。而硬度大于HRC30时加工出的零件,表面质量虽然较好,但刀具易磨损。所以,在材料进厂后,先进行调质处理硬度达到HRC25~30,然后再进行切削加工。
化学成分
碳 C :0.26~0.35
硅 Si:≤1.00
锰 Mn:≤1.00
硫 S :≤0.030
磷 P :≤0.035
铬 Cr:12.00~14.00
镍 Ni:允许含有≤0.60%
力学性能
力学性能:
抗拉强度 σb (MPa):淬火回火,≥735
条件屈服强度 σ0.2 (MPa):淬火回火,≥540
伸长率 δ5 (%):淬火回火,≥12
断面收缩率 ψ (%):淬火回火,≥40
冲击功 Akv (J):淬火回火,≥24
硬度 :退火,≤235HB;淬火回火,≥217HB
热处理工艺
热处理规范:1)退火,800~900℃缓冷或约750℃快冷;2)淬火,920~
3cr13制品(4张)
980℃油冷;3)回火,600~750℃快冷。
金相组织:组织特征为马氏体型。
交货状态:一般以热处理状态交货,其热处理种类在合同中注明;未注明者,按不热处理状态交货。
1Cr13、2Cr13、3Cr13 、3Cr13Mo 、7Cr17 、 11Cr17 是马氏体不锈钢,也叫不锈铁
不锈铁。
3Cr13比410(1cr13)和420J1(2cr13)还要高的强度、硬度、淬透性,在室温(700度)的稀HNO3和弱有机酸中有耐蚀性,和焊接性不及410和410J1。
一、3Cr13对应牌号:1、国标GB-T标准:数字牌号:S42030、新牌号:30Cr13、旧牌号:3Cr13,2、美标:ASTMA标准:S42080,SAE标准:一,UNS标准:420,3、日标JIS标准:sus420J2,4、德标DIN标准:1.4028,5、欧标EN标准:X30Cr13,法标NF标准:z33c13。
二、3Cr13化学成分:⑴碳C:0.26~0.35,⑵硅Si:≤1.00,⑶锰Mn:≤1.00,⑷磷P:≤0.040,⑸硫S:≤0.030,⑹铬Cr:12.00~14.00,⑺镍Ni:充许加≥0.60,⑻钼Mo:—,⑼氮N:—,⑽铜Cu:— ,⑾其它元素:—。
三、3Cr13物理性能:①密度密度(20℃)
/kg/dm3:7.76,②熔点/℃:1365,③比热容(0~100℃)/kg/(kg.k):0.17,④热导率/w/(m.k)
100℃-:25.1,⑸热导率/w/(m.k)
500℃-:
25.5,⑥线胀系数
/(10-6/k)
0~100℃:10.5,⑦线胀系数/(10-6/k)
0~594℃:12,⑧电阻率(20℃)
/(Ω.mm2/m):0.52,⑨纵向弹性模量
(20℃)/GPa:219,⑩磁性:有。
四、3Cr13力学性能:⑴交货状态:棒材固溶处理,板材固溶酸洗,⑵抗拉强度(RM/MPa):735、540,⑶延伸强度(Rp0.2/MPa):540、225,⑷伸长率A/%:18,⑸断面收缩率(Z/%):40。
五、3Cr13热处理:①硬度HBW≤:退火235,淬火回火217,硬度HRB≤:99,②加热温度:800~900,③加热方式:空冷或缓冷。
3Cr13应用领域:主要用于高强度部件及承受高强度压力负荷并在有腐蚀介质条件下的磨损件,如300度以下工作的刀具、弹簧,400度以下的工作轴。螺栓,阀门,轴承等。
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