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球墨铸铁QT500-7 GB 1348-88
材料名称:球墨铸铁
牌号:QT500-7
标准:GB 1348-88
特性及适用范围:
为铁素体型球墨铸铁,强度与塑性中等,被切削性尚好。低温时,韧性向脆性转变,但低温冲击值较高,且有一定的抗温度急变性和耐蚀性。用途较广,用于内燃机的机油泵齿轮,汽轮机中温气缸隔板,水轮机的阀门体,铁路机车车辆轴瓦,机器座架传动轴等
化学成份:
碳 C :2.96~3.35
硅 Si:2.34~2.86
锰 Mn:0.50~0.68
硫 S :0.015~0.019
磷 P :0.038~0.053
力学性能:
抗拉强度 σb (MPa):≥500
条件屈服强度 σ0.2 (MPa):≥320
伸长率 δ (%):≥7
硬度 :170~230HB
热处理规范及金相组织:
热处理规范:(由供方定,以下为某试样的热处理规范,供参考) 920℃退火
金相组织:铁素体+珠光体
供应GB标准QT500-7高磨损球墨铸铁板料 棒料 可任意切割
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