,: L 0 = 5 d0 ; V, 10 mm 10 mm 55 mm 1. 2 CS2344 ; HB23000 ; MeF3 ;CFF2220 GB ,22 ( ),0, - 20, - 40, - 55,3 ;GB230B GB , 22 ( ),0, - 5

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欧勇李
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1 Materials for Mechanical Engineering Vol. 32 No. 2 Feb. 2008,, (,, ) : ;, : ; B7, - 55, 568,700 MPa %, %,615,675 MPa %,22. 0 % ; : ; ; : U ; U214 : A : (2008) Perf ormance Evaluation of Two Ne w Types of Fishplate Materials Used f or High2speed Rail way WEN Kai, XU Fu2min, TAN Yi (Dalian U niver sit y of Technology, Dalian , China) Abstract : According to the state standard, comparative studies were made on the tensile property and impact property of two types of new fishplate materials made both in China and Germany at room temperature and low temperature. The images of tensile f racture and impact f racture at various temperatures were observed with SEM. The modes of cracking are discussed. The result s indicate that the two types of materials are low alloy steels. At room and low temperature, the tensile and impact properties of these two materials are superior to the B7 steel used at present in China and the fishplate material made in Japan. Under the condition of room temperature and - 55, the yield strength and elongation of domestic material respectively were 568 MPa, 700 MPa, %, %, while tho se of Germany material respectively were 615 MPa, 675 MPa, %, %. properties of the fishplate material made in Germany is more stable than that made in China. Key words : fishplate material ; mechanical property ; f racture analysis In addition, the mechanical 0,,,,,, [1 ],, ; : ; : : (J H01-071) : ( ),,, :,,,, [2 ],,,,20 90, [ 3,4 ], ( A) ( B) d0 = 10 mm 49

2 ,: L 0 = 5 d0 ; V, 10 mm 10 mm 55 mm 1. 2 CS2344 ; HB23000 ; MeF3 ;CFF2220 GB ,22 ( ),0, - 20, - 40, - 55,3 ;GB230B GB , 22 ( ),0, - 5, - 10, - 13, - 15, - 20, - 30, - 45, - 60 J SM25600LV (SEM) ( a) A , A B ; A B, B, [5 ] 1 A B( / %) Tab. 1 Chemical composition of f ishplate materials A and B( mass/ %) C Si Mn Cr P Ni Cu S V A B ( b) B 1 A B Fig. 1 Microstructure of fishplate materials A and B A B, A B,, A B 2. 4 A B,A B, B7, 2 [2,7 ] , A [6 ], 8. 91m, 4. 62m ; B,, 16. 5m, m ; A B 2. 3, TB/ T kg m - 1 B HB A 254 HB,,B HB, ; A B 26 HB 2 A B B7 2 Fig. 2 Contrast f igure of impact properties of materials A, B, B7 and Japanese fishplate at various temperatures 0. 4 A kv ( ) [8 ],A - 10,B - 50 A 102 J, B ;,A,- 10 B A B 50

3 ,: B7 3, A,- 50, 4, B, , A B,2, B ( a) 22 ( b) - 20 ( c) A SEM Fig. 3 SEM micrographs of impact fractures of material A at various temperatures ( a) 22 ( b) - 20 ( c) B SEM Fig. 4 SEM micrographs of impact fractures of material B at various temperatures 2. 5 (1) 2, A B, A 0. 66, B 0. 77,, [9 ] A B 2 Tab. 2 Data of the tensile properties of f ishplate materials at room temperature / MPa / MPa / % B / % A B (2) 5,, A B,,,, [10 ] ;,, (3) SEM 6,22,,,- 55, 7,22,,,,A, B A 51

4 ,: 3 5 A B 2 Fig. 5 The tensile properties of materials A and B changing with the test temperatures (1) A B,A,B,;A B (2) A B B7, 2, ;, (3) A 100 J,,, J ; B 32 J,,; A B B7 (4) A B, ( a) 22 ( b) - 20 ( c) A SEM Fig. 6 SEM micrographs of tensile fractures of material A at various temperatures ( a) 22 ( b) - 20 ( c) B SEM Fig. 7 SEM micrographs of tensile fractures of material B at various temperatures : [ 1 ],,,. [J ].,2004 (3) : [ 2 ],,. [J ].,1995 (2) : [ 3 ],,,. [J ].,1998 (6) :1-7. [ 4 ],,,. [J ].,2005 (3) : [ 5 ],,. [ M ]. :,2005. [ 6 ],. [J ].,2002 (1) : (56 ) 52

5 ,:, ;,, A dm - 2, nm (2),,, 26 h, : [ 1 ] Sriraman K R, Ganesh Sundara Raman S, Seshadri S K,et al. Corrosion behaviour of electrodeposited nanocrystalline Ni2W and Ni2Fe2W alloys [ J ]. Materials Science and Engineering, 2007,460/ 461 : [ 2 ] Li J, Sun Y, Sun X,et al. Mechanical and corrosion2resistance performance of electrodeposited titania2nickel nanocomposite coatings[j ]. Surface and Coatings Technology,2007,192 : [ 3 ] Wang Liping, Zhang J unyan, Gao Yan,et al. Grain size effect in corrosion behavior of electrodeposited nanocrystalline Ni Coatings in alkaline solution [J ]. Scripta Materiala,2006,55 : [ 4 ] Lu Hai2Bo, Li Ying, Wang Fu2Hui,et al. Improved corrosion behavior of nanocrystalline Cu220Zr films in HCl solution[j ]. The Solid Films,2006,510 : [ 5 ] Bakonyi I, Tot h2kadar E, Pogany L, et al. Preparation and characterization of d. c. 2plated nanocrystalline nickel electrode2 posits[j ]. Surface and Coatings Technology,1996,78 (1) : [ 6 ] Qiao Guiying, Jing Tianfu, Wang Nan, et al. High2speed jet electrodeposition and microstructure of nanocrystalline Ni2co alloy[j ]. Electrochimica Acta,2005,51 (1) : [ 7 ] Eva Pellicer, Elvira G mez, Elisa Vall s. Use of the reverse pulse plating method to improve the properties of cobalt2mo2 lybdenum electrodeposits[j ]. Surface and Coatings Technolo2 gy,2006,201 : [ 8 ] Bahrololoom M E, Sani R. The influence of pulse plating pa2 rameters on t he hardness and wear resistance of nickel alu2 mina composite coatings [J ]. Surface and Coatings Technolo2 gy,2005,192 : [ 9 ]. [ M ]. :, 2005 :23-29, [ 10 ]. [ C]/ / 2002, :,2002 : [ 11 ],. [ M]. :,2001 :148. [ 12 ],,,. [J ].,2007,40 (3) : [ 13 ],,,. [J ].,2006,30 (6) : [ 14 ],,,. [J ].,2004,26 (3) : [ 15 ] Celik E, Ozdemir I, Avci E, et al. Corrosion behaviour of plasma sprayed coatings[j ]. Surface and Coatings Technolo2 gy,2005,193 : [ 16 ] Graranis G, Tset sekou A, Zambetakis Th, et al. Ceramics coating and laser treatment [J ]. Surface and Coatings Tech2 nology,1991,45 : [ 17 ],,. [J ].,2005,38 (7) :8-10. [ 18 ],. Ni2ZrO2 [J ].,2006,18 (5) : [ 19 ] Gao Ya2li, Wang Cun2shang, Yan Man,et al. The resistance to wear and corrosion of laser2cladding Al2O3 ceramic coating on Mg alloy [ J ]. Applied Surface Science, 2007, 235 ( 12) : (43 ) [ 3 ] Zhang Xudong, Chen Wuzhu, Jiang Ping,et al. Modeling and applications of plasma charge current in laser welding [ J ]. Journal of Applied Physics,2003,93 (11) : [ 4 ] Ming f. sh. i. Advanced High Strengt h Steels Properties Per2 formances and Applications [ C ]/ / China2America Automotive Materials Seminar. Detroit : MI,2003 : [ 5 ]. [ M ]. :, [ 6 ]. [ D ]. :,2006. [ 7 ] Khersonsky A, Lee H. Induction heating for efficient laser ap2 plication[j ]. Advanced Materials & Process, 2000 ( 4) : [ 8 ] Lei Hong. The study of stability model of laser welding alu2 minium alloys and the influence of heat input parameters to the stability[ D]. Beijing : Tsinghua University,2003. [ 9 ]. 400 MPa [ D]. :,2002. (52 ) [ 7 ],,,. 56Nb [J ].,1993 (1) : [ 8 ]. [ M ]. :, [ 9 ] (),. [J ]., 2005 (6) : [ 10 ],,. 95W25 ( Ni/ Fe/ Co) [J ]., 2004 (6) :

T K mm mm Q345B 600 mm 200 mm 50 mm 600 mm 300 mm 50 mm 2 K ~ 0. 3 mm 13 ~ 15 mm Q345B 25

T K mm mm Q345B 600 mm 200 mm 50 mm 600 mm 300 mm 50 mm 2 K ~ 0. 3 mm 13 ~ 15 mm Q345B 25 23 4 2018 8 Vol. 23 No. 4 JOURNAL OF HARBIN UNIVERSITY OF SCIENCE AND TECHNOLOGY Aug. 2018 Q345B 1 " 1 2 2 2 1. 150040 2. 200125 Q345B 536. 47 MPa 281 HV Q345B DOI 10. 15938 /j. jhust. 2018. 04. 021 TG444