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| 氮化层深度：0.5-0.8mmDepth of nitration case:0.5-0.8mm |
| 氮化硬度：950-1020HVHardness of nitration:950-1020HV |
| 氮化脆度：≤一级Fragility of nitration:Less than grade 1 |
| 表面粗糙度：Ra0.4umRoughness of the surface:Ra 0.4un |
| 螺杆直线度：0.015mmLineatity of the screw:0.015mm |
| 双合金硬度：HRC55-62Hardness of double alloys:HRC55-62 |
| 双合金深度：＞2mmDepth of double alloys:＞2mm |
