A.20Cr滲碳,淬火+回火; B.20Cr表面淬火+回火; C.40Cr調(diào)質(zhì)表面淬火+回火; D.40Cr滲碳,淬火+回火; E.20Cr淬火+中溫回火;
A.連桿; B.連桿螺栓; C.車床主軸; D.車床絲桿; E.缸蓋螺栓;