耐磨齿轮钢20CrMo铸造圆钢20CrMo齿轮钢 轴承钢
20 crmo alloy structural steel characteristics and scope of application: high hardenability, no temper brittleness, weldability is quite good, the formation of cold cracking tendency is small, can be good machinability and cold plastic strain. In conditioning or carburizing and quenching condition, used in the manufacture of the corrosive medium and working temperature below 250 ℃, the medium containing hydrogen nitrogen mixture work of high pressure pipe and all kinds of fasteners, the more senior carburized parts, such as gear, shaft, etc
20CrMo合金结构钢 特性及适用范围:淬透性较高,无回火脆性,焊接性相当好,形成冷裂的倾向很小,可切削性及冷应变塑性良好。一般在调质或渗碳淬火状态下使用,用于制造在非腐蚀性介质及工作温度低于 250℃、含有氮氢混合物的介质中工作的高压管及各种紧固件、较高X的渗碳零件,如齿轮、轴等。
20CrMo合金结构钢 化学成份:
碳 C :0.17~0.24
硅 Si:0.17~0.37
锰 Mn:0.40~0.70
硫 S :允许残余含量≤0.035
磷 P :允许残余含量≤0.035
铬 Cr:0.80~1.10
镍 Ni:允许残余含量≤0.030
铜 Cu:允许残余含量≤0.030
钼 Mo:0.15~0.25
力学性能:
抗拉强度 σb (MPa):≥885(90)
屈服强度 σs (MPa):≥685(70)
伸长率 δ5 (%):≥12
断面收缩率 ψ (%):≥50
冲击功 Akv (J):≥78
冲击韧性值 αkv (J/cm2):≥98(10)
硬度 :≤197HB
试样尺寸:试样毛坯尺寸为15mm
热处理规范及金相组织:
热处理规范:淬火880℃,水冷、油冷;回火500℃,水冷、油冷。
交货状态:以热处理(正火、退火或高温回火)或不热处理状态交货,交货状态应在合同中注明。