012Al钢在气门热精锻模具的应用  

Application of0 1 2 Al stell on finish hot-forging die for valve

作　　者：李芬[1] 潘振鹏[1] 王桂棠[2] 黄惠平[2] 卢国辉[2] 

机构地区：[1]广东怀集汽车配件厂,526400 [2]广东工业大学

出　　处：《锻压技术》1997年第3期60-63,共4页Forging & Stamping Technology

摘　　要：气门热精锻模具失效的主要形式是热磨损和压塌。 0 1 2 Al钢(5 Cr4Mo3Si Mn VAl)的室温及高温的硬度、磨损抗力、屈服强度和热稳定性 ,以及氮化能力比 3Cr2 W8V较高 ,因此用 0 1 2 Al钢替代传统应用的 3Cr2 W8V钢在理论上是合理的。再者 ,由于气门热精锻模具甚少因断裂失效 ,而且 0 1 2 Al钢比 3Cr2 W8V钢有较高的韧性 ,因而可以较大地提高 0 1 2 Al钢的淬火温度 (约 5 0℃ ) ,适当地降低加火温度 (约 30℃ ) ,在保证有足够韧性前提下 ,提高模具的室温及高温的硬度、磨损抗力、屈服强度和热稳定性 ,以提高模具寿命。生产试验表明 ,0 1 2 Al钢制气门热精锻模具的工作寿命是 3Cr2 W8V钢的 1 .8～ 2 .2倍。The main failure mode of the finish hot- forging dies for Valves are the hot wear of col- lapse.The hardness,yield strength,Wear resistance at the room and the high temperature,and the ther- mal stability ,the nitrided capabitity of 0 12 Al steel ( 5Cr4 Mo3Si Mn VAl) are better than that of 3Cr2 W8V steel,so in theory the dies made of0 12 Al steel could have a longer service life than the con- ventional3Cr2 W8V Steel.Because the dies were hardly cracken of fractured itwould be possible in theo- ry to lengthen the die service life by means of increasing the hardness,yield strength,wear resistance at the room and high temperature,and the thermal stability of the dies made of0 12 Al steel,For this rea- son,We will raise the quanching temperature about50℃ and decrease the tempering temperature about 30℃ during die heat treatment.The production tests shown that the die service life of0 12 Al steel was 1.8～ 2 .2 times of3Cr2 W8V steel.

关 键 词：热精锻模 模具钢 模具 寿命 热处理 气门 

分 类 号：TG162.41[金属学及工艺—热处理]