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我厂热挤压——扩孔自动生产线是生产轴承圈毛坯的,所用模具工作条件恶劣,锻坯下料重达17.5Kg,经镦粗、预成型、冲孔、整径等工序;模具经受高温、高压并采用喷水强制冷却和油雾润滑;要求具有高温强度、韧性、抗回火稳定性和耐冷热疲劳性能。这种模具用钢国外采用5%Cr系(X 40CrMo V 51)和3Cr—3Mo系(X 32CrMo V 33)钢;我厂曾使用过5 CrMnMo、3Cr 2 W8 V钢,性能不能满足生产要求。一年来,我们改用5Cr4Mo3SiMnVAl、35Cr3Mo3W2V及4Cr5MoV1Si钢制作模具,取得了满意效果。 1.5Cr4Mo3SiMnVAl钢模具这种钢是贵阳钢厂等研究的新钢种,其淬透性、淬硬性及热处理后各项机械性能和抗磨性皆良好,由于含Al,渗氮性能亦佳。
I plant hot extrusion - reaming automatic production line is the production of bearing ring rough, the working conditions of the poor use of the mold, forging blanking weighing 17.5Kg, the upsetting, pre-forming, punching, diameter and other processes; die withstand High temperature, high pressure and water jet forced cooling and oil mist lubrication; requires high temperature strength, toughness, anti-tempering stability and thermal fatigue resistance. This kind of mold steel adopts 5% Cr (X 40CrMo V 51) and 3Cr-3Mo (X 32CrMo V 33) steel abroad. The steel of our factory has used 5 CrMnMo and 3Cr 2 W8 V steel and its performance can not meet the production requirements. Over the past year, we use 5Cr4Mo3SiMnVAl, 35Cr3Mo3W2V and 4Cr5MoV1Si steel mold, and achieved satisfactory results. 1.5Cr4Mo3SiMnVAl steel mold This steel is Guiyang steel and other research new steel, the hardenability, hardenability and heat treatment after the mechanical properties and abrasion resistance are good, due to Al, nitriding performance is also good.