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一般而言,钢铁件所需的硬度要求只能通过适当的热处理来实现。在传动件的生产过程中,通常用表面硬化处理方式来获得表面硬度、抗磨损且心部保持足够的强韧性。如果能够缩短表面硬化处理时间,而且仅仅局部地应用,就能有巨大的潜在经济前景。因为低压渗碳(LPC)能产生大量的碳原子团,所以对比传统的气体渗碳,低压渗碳能缩短热处理的时间。提高渗碳温度也能大大提高生产力,但因受热处理炉零件和工艺的限制,高温渗碳在常规气体渗碳系统里并不可行。通过加入铝、铌和钛等微合金元素并适当调整含氮量,即使热处理温度高于1000℃,最新的表面硬化钢也能获得满意的晶粒度等级。如今,真空渗碳系统已能适应于高于1000℃的热处理温度。
In general, the required hardness of steel parts can only be achieved by appropriate heat treatment. In the production of transmission parts, surface hardening is usually used to obtain the surface hardness, wear resistance and the heart to maintain sufficient strength and toughness. There are huge potential economic prospects if the amount of surface hardening treatment time can be shortened and only applied locally. Because low-pressure carburization (LPC) produces large numbers of carbon radicals, low-pressure carburization can shorten the heat treatment time compared to conventional carburizing. Increasing the carburizing temperature can also greatly increase productivity, but high temperature carburizing is not feasible in conventional carburizing systems because of the limitations of the parts and processes of the heat treating furnace. By adding micro-alloying elements such as aluminum, niobium and titanium and properly adjusting the nitrogen content, the latest case hardened steels achieve satisfactory grain size ratings even at heat treat temperatures above 1000 ° C. Today, vacuum carburizing systems have been able to adapt to heat treatment temperatures above 1000 ° C.