金刚石锯片激光焊接接头的成分,组织和性能

金 刚 石 锯 片 激 光 焊 接 接 头 的 成 分 、组 织 和 性 能 ① ??? 　? 　? (?????? , ?? 100083) ??? 　??? (???????????? , ?? 518000) ? 　? 　　?? X??????????? , ???????????????????? , ?? ????????? 。???? ,?????????????? , ????????????? , ? ?????????????????。 ??? 　???? 　????? 　?? 　?? ??????　TG174. 44 　　?????????????????? ????。?????????????。? ??????????????? , ???? ??????。????????????? 80 ????????? , ???????? , ??????????????????? ?[1 - 3]。???????????????? ???、?????。 1 　???? ?????????????????? ?????? , ????? 900 ?, ?? 20 MPa , ?? 10 min。??????? : 45 %6262 3 ?? , 30 %? , 10 %??? , 15 %?。??? ????????? 1 mm ???? , ?? Fe ? Ni。??????? 40 Cr。?????? , ???????? 1 ??。??????、? ???、X??????????????? ????? , ?????????????? ???????。 ? 1　????????? Fig. 1 　Scheme of laser welding system 2 　????? 2. 1 　???????????? ????????????????? , ???????????????? 40 Cr ? ?。SEM???? , ?????????? , ????? , ?? 2。?????????? ???????????? , ?“?????” ? 9 ??? 1 Vol. 9 　Suppl . 1 　　　　　　　　　　 ???????? The Chinese Journal of Nonfer r ous Meta ls 　　　　　　　　　　1999 ? 7 ? J ul . 1999 ① ???? ; ???? 3 　　??? , ? , 3 ? , ?? ? : 1998 - 08 - 18 : 1998 - 11 - 0 0 ?。?? , ??????????????? ????????? , ????致????? ?????[4 ]。 ? 2 　????????? Fig. 2 　Cracks in welded seam ????????????? , ???? ???????? 1 mm ?????。Cu , Ni ? Fe ???????????????? , Ni ????????????????。? ??? , ????????? 40 Cr ???? ?????? , ?????。 2. 2　?????、???? ? 3 ?????? 0. 15 mm ? , ???? ? 3 　??? Ni ? Cr ????? F 3 　N , , 3? 2 ff ; ?W ? Ni 、Cr ??????。???? , ???? ?????。??????? , Ni ???? , ? Cr ????。 ????????????? , ???? ???????? , ??????????? ?? ; ?? , ?????、??????? , ????????? , ???致?????? ???[5]。 ???????? , ????????? ???? 1。 ? 1 　???????? (??? ) Table 1 　Chemical analytic result of composition in welded seam(average) ( %) Ni Cr C Fe 3. 44 0. 67 0 . 12 Balance ? 4 ??????? 40Cr ????? X ??????。?????α2Fe ??γ2( Fe , Ni)??????? , ??α2Fe ?????? ?。????????????????? ? , ????????????。 ? 4　?? X????? Fig. 4 　XRD spect rum of welded seam ???????????????。?? ???????????????????? ???。??????????? , ???? ?????。? 5 ?????????? , ? ?012? ???????? 　　　　　　　　　　　　　　　　　1999 ? 7 ? ? ig. i Cr composition distributions in welded seam 1 Heat e ected area 2 elded seam area ? 5　?????? Fig. 5 　Typical microst ructure in welded seam ?????。 2. 3　??????????、????? ????? (Δl ) ?????????? ?????????? , ????????? ?? (??????Δl ??) , ??????、 ???????。? 2 ?????????? ?? Ni , Cr ??。?????????? , Cr ???? , Ni ????。 ? 2 　??????????? Ta ble 2 　Composition in welded seam at different beam alignment Beam alignment / mm - 0 . 10 0. 00 0. 05 0 . 10 0 . 15 w (Ni) / % 8 . 83 7. 67 4. 98 2 . 61 0 . 93 w (Cr) / % 0 . 16 0. 18 0. 56 0 . 67 0 . 83 ???????“???”????? ?[6 ]。???γ????????????? ???????。??????????? xM ?????? (??????) : xM = (1 - γ) x?? +γx? 。????????????? 3 , ??????????。 ????????????? , ???? ???????????????????? ???。?????????????、?? ????。?????? , ???????? ????????? , ?????[7 ] ; ??? ??? , ?????????。?????? 0. 25 %?????。??? 3 , ?????? ???????? , ????Δl = 0. 1 mm。 ? 3 　?????????????? Table 3 　Calculated composition in welded seam at different beam alignment Beam alignment Δl/ mm - 0. 10 0 . 00 0 . 05 0 . 10 0. 15 w (Ni) / % 7. 93 5 . 56 4 . 43 3 . 04 1. 78 w (Cr) / % 0. 17?0. 24 0. 36? 0 . 50 0 . 46? 0 . 63 0 . 57? 0 . 78 0. 68? 0. 94 w (C) / % 0. 07?0. 09 0. 17? 0 . 20 0 . 21? 0 . 26 0 . 26? 0 . 31 0. 31? 0. 38 ?????????????????? ???。Schaeffler ???? Fe2Ni2C???? ??[8 , 9 ]?????????????。? 6 ?????????????? , ????? ??? , ?????? , ????? , ??? ?????。 2. 4 　?????????????? ????? 2. 0 kW , ???? 20 mm/ s , ???? TEM01 , ????? + 1. 0 mm ?? ??????????????????? ? , ? 20 N ?? , ???????? X ?? (?????????) ?????????? ? , ?? 7 , ?????????????? ?????。? X ????? , ??? (1 ?) ??? (5 ?)????? ; ??? (3 ?) ?? ???????? , ?????? ; 40Cr ?? ?????? (4 ?)?????? , ???? ???? , ???????? ; ?????? ?? ( 2 ? ) ???????? , ????? ?。 ?????????? 20. 0 mm ?8. 0 ? 。?????? , ?????? ??????????? M ? M 。??????? , ?????????。 ?112?? 9 ??? 1 　　　　　　　　　　　???? : ??????????????、????? ? mm 2. 0 mm 704. 0 Pa 821. 0 Pa ? 6　??????????? Fig. 6 　Microst ructures in welded seam at different beam alignments (a) ?Δl = 0 mm ; (b) ?Δl = 0. 16 mm ; (c) ?Δ l = - 0. 15 mm ? 7 　????????? Fig. 8 　Microhardness of welded joints 1 ?Transient layer ; 2 , 4?Heat2effected zone ; 3 ?Welded seam ; 5 ?Steel core 3 　?? (1) ???????????????? ??????。????????????? ?????????????。 ( ) ???????????????? ??????? , ?????α2F ?γ2( F , N )???????。 (3) ???????????????? ??? , ?????????、?????? ?????。 REFERENCES 1　Weber G. Industrial Diamond Review , 1991 , 23(3) : 126. 2　Walter M. Industrial Diamond Review , 1988 , 5 : 206. 3　Schneider W. Industrial Diamond Review , 1985 , 5 : 242. 4　ИситлетоК(????? K) . Int roduction to Weld2 ing Theory of Physical Metallurgy (??????? ?) . Beijing: Mechanical Industry Press , 1989. 5　Guitterez et al . Welding Joural , 1996 , 75 (4) : 115 - 121. 6 　He Kangsheng (??? ) , Cao Xiongfu (? ?? ) . Weldability of Dissimalar Metal (?? ????? ? ) . Beijing : Mechanical Industry Press , 1986 : 213. 7　Ng , ES^ Watson , IA. Journal of Laser Applications , 1997 , 9 (1) : 15 - 21. 8　Katayama S and Mat sunwa. In : Proceedings of ICA2 LEO’85. San Franciso , California , 1985. 　K j V , M T I I 2 f I L O’ S , , US , 5 ?212? ???????? 　　　　　　　　　　　　　　　　　1999 ? 7 ? ? 2 e e i 9 u anpaa P Helin J P and oisio J . n : Pro ceedings o CA E 88 . anta Clava CA A 1988 : 2 . COMPOSITION, MICROSTRUCTURE AND PROPERTIES OF WELDED JOINT OF DIAMOND SAW BLADE BY LASER WELDING Xia J inhua and Yin Sheng U ni versi ty of Science and Technology Bei ji ng , Beij in g 100083 , P. R. Chi na Ye Hongyu and Hu Enliang Shenzhen Shenda S uperh ard Materi als Co. L t d . , S henzhen 518000 , P. R. Chi na ABSTRACT　The composition and microstructure of the diamond saw blade joint welded by laser welding were studied using X2ray diff raction and SEM , and the mechanical properties of welded joint were measured. The result s showed that t he welding properties are affected by the composition of segment s , the composition and microstruct ure in welding seam are strongly affected by the beam alignments. Key wor ds 　diamond saw blade　laser welding　composition　microstr uct ure (?? 　???) ?312?? 9 ??? 1 　　　　　　　　　　　???? : ??????????????、????? ?