
合金结构钢20Cr轧圆 20Cr锻材20Cr低碳结构钢
20Cr合金结构钢 强度和淬透性较高15Cr钢,韧性较差;焊接性较好,焊后一般不需热处理。用于心部强度要求较高和表面承受磨损、尺寸较大的、或形状较复杂而负荷不大的渗碳零件,如齿轮、齿轮轴、凸轮、活塞销、蜗杆等,也可用作工作速度大并承受中等冲击负荷的调质零件。
20 cr alloy structural steel strength and high hardenability 15 cr steel, poor toughness; Better weldability, generally do not need to heat treatment after welding. Higher requirements for the core strength and surface under wear, larger size, or shape is complex and load is carburized parts, such as gear, gear shaft, CAM, piston pin, worm, etc., also can be used as a working speed of big and medium under impact load conditioning parts.
20Cr合金结构钢化学成份:
碳 C :0.18~0.24
硅 Si:0.17~0.37
锰 Mn:0.50~0.80
硫 S :允许残余含量≤0.035
磷 P :允许残余含量≤0.035
铬 Cr:0.70~1.00
镍 Ni:允许残余含量≤0.030
铜 Cu:允许残余含量≤0.030
20Cr合金结构钢强度和淬透性较高15Cr钢,韧性较差;焊接性较好,焊后一般不需热处理。用于心部强度要求较高和表面承受磨损、尺寸较大的、或形状较复杂而负荷不大的渗碳零件,如齿轮、齿轮轴、凸轮、活塞销、蜗杆等,也可用作工作速度大并承受中等冲击负荷的调质零件。
热处理规范:淬火:X一次880℃,X二次780~820℃,水冷、油冷;回火200℃,水冷、空冷。
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。