注塑机螺杆与机筒：                     
       材料： 优质合金钢                             
           1>38CrMoAlA（JIS  SACM645）          
           2>42CrMo（JIS  SCM  440 ）            
            3>9Cr18Mov                          
           4>CW6MoCr4V2                       
           5>SKD61                               
        热处理：渗氮处理                               
            电镀硬铬层                           
            高频淬火                             
            喷涂双金属合金层                      
            真空淬火  


技术指标：
调制硬度：HB280°—290°
氮化深度：TO.60mm—0.70mm
氮化硬度：HV850°—1020°
直线度：0.015mm/m
镀铬厚度：>HV900°
    镀铬深度：0.03—0.08mm
     双合金硬度：HRC55°—62
 双合金深度：>2mm
 表面粗糙度：Ra0.4um