近年来由于塑料工业的迅速发展,对塑料挤出机的性能、规格和使用寿命提出了新的要求。发展新颖的塑料挤出机,提高产品质量,延长使用寿命,都必须首先解决该机的关键零件一螺杆(图1)和机筒的耐磨和耐蚀问题。尽管以往螺杆已采用38CrMoAlA合金钢和气体氮化工艺,但仍未能解决耐磨和耐蚀问题。 In recent years due to the rapid development of the plastics industry, plastic extruder performance, specifications and service life put forward new requirements. The development of new plastic extruder, improve product quality, extend the service life, we must first solve the aircraft’s key components a screw (Figure 1) and barrel wear and corrosion problems. Although 38CrMoAlA alloy steels and gas nitriding processes have been used in the past, abrasion and corrosion resistance problems have not yet been solved.