Iyo yekuzvigadzirisa-inogadzirisa Kukuya maitiro eYakakwira-kumhanya Rail Kukuya pasi peSliding-rolling Composite Motions.

Iyo yekuzvigadzirisa yekukuya maitiro echitima chepamusoro-soro pasi pekutsvedza-inotenderedza maumbirwo anonangana nekugadzirisa kuita kwekugaya uye kunaka kwepasi. Njanji dzepamusoro-soro, dzinoratidzwa nekumhanya kwakanyanya uye mitoro yakareruka yeaxle, kazhinji inotambura nekukunguruka kuonana kuneta [1], izvo zvinotungamira kupararira kwepamusoro [2-4], kuneta kutsemuka [5,6], uye kuputsika [7,8]. Idzi nyaya dzinoda kugadziriswa nenguva kuti ive nechokwadiyakachengeteka uye yakavimbika kushanda kwenjanji network. Nzira dzechinyakare dzekukuya njanji dzinovavarira kugadzirisa zvirema zvakadzika-dzika asi kazhinji zvinokonzeresa kusashanda zvakanaka, nguva dzekugadzirisa dzakawedzerwa, uye kukuvara kwekupisa. High-speed grinding (HSG) yakabuda seimwe nzira inoshanda, inopa kukurumidza kukuya (60-80 km / h) uye yakaderedza "mahwindo ekugadzirisa." Kusiyana nekugaya kwakajairwa, HSG inoshanda kuburikidza nekutsvedza-inotenderedza inoumbwa mafambiro, ichifambiswa nemasimba anopokana pakati pemavhiri ekukuya (GWs) uye pamusoro penjanji [9]. Iyi yakasarudzika michina inogonesa zvese kubviswa kwezvinhu uye abrasive kuzvirodza. Nekudaro, kupindirana pakati pekutsvedza nekukunguruka kwave kuongororwa zvisina kukwana, kudzikamisa kugona kweHSG kwekugadzirisa njanji. Mubasa iri, yakagadzirwa pamba HSG test rig yakashandiswa kutevedzera pa-saiti mamiriro ekukuya. Miedzo yakaitwa pasi pemakona akasiyana-siyana (30 °, 45 °, uye 60 °) uye mitoro yekukuya (500 N, 700 N, uye 900 N) [10, 11].

1. Chiyero cheSlide-roll.Mhedzisiro yacho inoratidza kuti kutsvedza-kutenderedza-anoumbwa mafambiro anoita basa rakakosha mukupesvedzera maitiro ekukuya. Sliding-rolling ratio (SRR), inotsanangurwa seyero ye sliding sliding speed to rolling speed, sezvinoratidzwa muFig.1, yakawedzera pamwe chete nekona yekubatanidza uye grinding load, iyo intuitively yakaratidza kuchinja kwekufamba-kutenderera kwekombikiti yezviviri zvekukuya. Semuenzaniso, iyo SRR yakakura kubva pa 0.18 pa 30 ° yekuonana angle kusvika 0.81 pa 60 °. Kuchinja uku kubva pakufamba-kunotungamirwa kuenda pakuenzanisa pakati pekutsvedza nekukunguruka kwakavandudza mhedzisiro yekukuya. Chidzidzo chacho chakawana kuti 45 ° yekuonana angle yakagadzira hukuru hwepamusoro hwekukuya, nepo 60 ° yekuonana yakabereka yakanakisa kunaka kwepamusoro, Surface roughness (Ra) yakaderera zvikuru sezvo kona yekubatanidza yakawedzera, kubva pa12.9 μm pa 30 ° kusvika 3.5 μm pa 60 °, sezvinoratidzwa muFig.2 kusvika Fig.4.

2. Kukuya-induced WEL.Munguva yekukuya, nekuda kweiyo thermo-mechanical coupling mhedzisiro, kusanganisira yakanyanya kusangana kushushikana, tembiricha yakakwira, uye nekukurumidza kutonhora, shanduko yemetallurgical uye deformation yepurasitiki inoitika pamusoro penjanji. Shanduko idzi dzinotungamira mukuumbwa kwe brittle white etching layer (WEL), iyo inowanzotyoka pasi pezvitsigiro zve cyclic kubva pavhiri-njanji kubata. Zvose zvezvigumisiro zvinoratidza kuti huwandu hwehuwandu hweWEL huri pasi pe8 μm, iyo yakaonda kudarika inoshanda inokuya-induced WEL (~ 40 μm) [12, 13], sezvakaratidzwa muFig.5. Chiitiko ichi chingangove chine chekuita neakasarudzika maitiro eiyo HSG nzira, Zvichienzaniswa neyechinyakare inoshanda kugaya, muHSG, imwechete abrasive particle inobata mukukuya kwechinguva chidiki chete panguva yekutenderera kumwe kutenderera, kunyangwe pamakona ekusangana. Kwenguva yakawanda, iyo abrasive particle iri munguva yekupisa kupisa mushure mekukuya. Izvi zvinovimbisa kuti chidimbu chinoputika chine nguva yakakwana yekubvisa kupisa kusati kwaita zvakare mukukuya, zvichiita kuti kuve nekuvandudzwa kwemamiriro ekupisa panzvimbo yekukuya.

3. Kukuya marara.Kuodza marara kuongororwa kwakapa mamwe manzwisisiro ezvekubvisa zvinhu, sezvakaratidzwa muFig.6 uye Fig.7. Kuyerera-kufanana uye marara-akaumbwa nebanga, ayo anoratidza kushanda kunobudirira kwekukuya, ainyanya kuwanda kune yakakwirira SRRs. Mukupesana, bhuroka uye marara akachekwa aive akanyanya pamakona akaderera, achiratidza kusakwana kuita kwekugaya. Kuvapo kwemarara akatenderera akawedzera nemitoro yekukuya, zvichiratidza tembiricha yekukuya. Aya macherechedzo anoratidza kukosha kwekugadzirisa maparamita ekukuya kuti aenzanise kushanda zvakanaka uye mamiriro ekupisa.

4. Mechanism yekutsvedza inotenderedza mukomboni kufamba.Chidzidzo chacho chakaratidzawo kupindirana kwakasimba pakati pekutsvedza uye kukunguruka kwekufamba mukukuya, sezvakaratidzwa muFig.8. Kutsvedza kunogonesa kubviswa kwezvinhu kubva pachitima chenjanji, uku uchikungurutsa marara akakwenenzverwa uye abrasive self-rodza. Iyi dhizaini chiyero yakakosha pakubudirira kukuya nekukuvadza kudiki kwekupisa. Nekudaro, kusimbirira kwakanyanya pane chero kufamba kunogona kutungamirira kune suboptimal mhedzisiro: rolling-inodzorwa kufamba kunowedzera kushata kwepamusoro, nepo kutsvedza-inodzorwa nekufamba kunogona kukonzera kuderedzwa kweabrasive kuvandudzwa uye kuwedzera kupisa kwekukuvara.

5. Kuongorora kwakadzama.Kuongorora kwakadzama kwekuita kwekukuya, kusanganisa kugona kwekugaya, kushata kwepamusoro, uye ukobvu hweWEL, zvakaratidza zvakanakira kukwidziridza kutsvedza-kukungurusa zvinoumba composite, sezvakaratidzwa muFig.9. Machati eradar ekuita kwekugaya pasi pemitoro yakasiyana-siyana uye makona ekubata airatidza kuti 45° yekona yekuonana yakapa chiyero chepamusoro chekushanda nemhando. Nekudaro, iyo 60 ° yekuonana kona yaigara ichigadzira yakatsetseka, ichiita kuti ive yakanaka kune yekupedzisira kugaya kupfuura. Izvi zvakawanikwa zvinoratidza kuti zvinonangwa zvigadziriso pakukuya paramita zvinogona kugadzirisa kukuvara kwenjanji kwakasiyana.

Tsvakurudzo iyi inopa zvinobatika pakugadzirisa njanji yepamusoro. Pakupfuura kwekutanga, 45 ° yekubata kona inokwidziridza kubviswa kwezvinhu, nepo 60 ° angle inovimbisa hukuru hwepamusoro hwepamusoro mumatanho ekupedzisa. Chidzidzo ichi chinosimbisa kukosha kwekuita kuenzanisa kutsvedza nekuumburudza kufambisa kuita kwekugaya, kuvandudza kunaka kwepamusoro, uye kuwedzera hupenyu hwesevhisi yekukuya mavhiri.

Mukupedzisa, chidzidzo chinoratidza basa rakakosha rekutsvedza-kutenderedza kompositi zvifambiso mukukuya-kumhanya njanji. Nekukwenenzvera chikamu chekutsvedza uye kutenderedza zviito, HSG inogona kuwana yepamusoro yekukuya kushanda uye kunaka kwepamusoro uku ichideredza kukuvadzwa kwekupisa. Izvi zvakawanikwa zvinopa hwaro hwe theoretical yekusimudzira tekinoroji yeHSG uye nhungamiro inoshanda yekuvandudza maitiro ekugadzirisa njanji.

Mufananidzo 1.Kusiyanisa maitiro eSRR, COF, uye kutenderera kumhanya nemitoro yekukuya uye yekubata angles.

Mufananidzo 2.Kukuya kushanda pasi pemakona akasiyana-siyana uye mitoro yekukuya.

Mufananidzo 3.Iyo yepamusoro morphologies yezvitima zvienzaniso pasi pemakona akasiyana ekusangana uye mitoro yekukuya.

Mufananidzo 4.Surface roughness uye3D morphologiesyemasampuli enjanji pasi pemakona akasiyana ekusangana uye mitoro yekukuya.

Mufananidzo 5.Cross-sectional optical uye SEM metallographic mifananidzo yezvitima zvienzaniso.

Mufananidzo 6.Mhando uye chikamu chekukuya mararapasi pemakona akasiyana-siyana uye mitoro yekukuya.

Mufananidzo 7.SEM mifananidzo uye EDS spectra yemhando dzakasiyana dzekukuya marara.

Mufananidzo 8.Schematic dhayagiramu yemhedzisiro yekutsvedza-inotenderedza composite kufamba paHSG.

Iri basa rakashumwa paJournal yeTribology International.

References

[1] Fan W, Wu C, Wu Z, et al. Static contact mechanism pakati peserrated contact vhiri uye njanji mukukuya njanji ine abrasive bhandi[J]. Zvinyorwa zveMaitiro eKugadzira, 2022, 84: 1229-1245.

[2] Cheng ZN, Zhou Y, Li PJ, nevamwe. Mutswe kuparadzira uye njanji pamusoro spalling nzira yakavakirwa peridynamics [J]. Nyaya yeTongji University, 2023, 51(6): 912-922.

[3] Wang JN, Guo X, Jing L, nevamwe. Finite element simulations yevhiri-rail inokanganisa mhinduro inokonzereswa nekutsikwa kwevhiri kwezvitima zvinomhanya zvikuru[J]. Kuputika uye Kuvhundutsa Mafungu, 2022, 42(4): 045103-1-045103-15.

[4] Hua J, Liu J, Liu F, nevamwe. Kudzidza pane strip WEA kupfeka kukuvadzwa uye kuneta spalling yeU71MnG njanji zvinhu nelaser quenching kurapwa[J]. Tribology International, 2022, 175: 107811.

[5] Benoît D, Salima B, Marion R. Multiscale characterization of head check initiation on rails under rolling contact kuneta: Mechanical and microstructure analysis [J]. Kupfeka, 2016, 366: 383-391.

[6] Shur EA, Borts AI, Bazanova LV, et al. Kutsunga kwekuneta kwekukura kwekukura uye nguva munjanji uchishandisa kuneta macrolines[J]. Russian Metallurgy (Metally), 2020, 2020: 477-482.

[7] Al-Juboori A, Zhu H, Li H, nevamwe. Microstructural kuongorora pane njanji kuputsika kukundikana kwakabatana ne squat defects[J]. Injiniya Kutadza Kuongorora, 2023, 151: 107411.

[8] Masoudi Nejad R, Farhangdoost K, Shariati M. Microstructural analysis uye kuneta kutsemuka maitiro enjanji simbi[J]. Mechanics eZvishandiso Zvepamberi uye Zvimiro, 2020, 27(2): 152-164.

[9] Von Diest K, Puschel A. High speed kugaya-njanji inoderedza ruzha kuburikidza nekugara kwenjanji pasina kukanganiswa kwemotokari[C]//INTER-NOISE uye NOISE-CON Congress uye Conference ProceedinGW. Institute of Noise Control Engineering, 2013, 247(2): 5206-5212.

[10] Von Diest K, Ferrarotti G, Kik W, et al. Pfeka kuongorora kwepamusoro-kumhanya-kukuya motokari HSG-2: kusimbiswa, simulation uye kuenzanisa nezviyero[M]//Dynamics of Vehicles on Roads and Tracks Vol 2. CRC Press, 2017: 925-930.

[11] Von Diest K, Puschel A. High speed kugaya-njanji inoderedza ruzha kuburikidza nekugara kwenjanji pasina kukanganiswa kwemotokari[C]//INTER-NOISE uye NOISE-CON Congress uye Conference ProceedingGW. Institute of Noise Control Engineering, 2013, 247(2): 5206-5212.

[12] Mesaritis M, Santa JF, Molina LF, et al. Post-field grinding ongororo yemagiredhi enjanji akasiyana mune yakazara-scale vhiri/njanji murabhoritari bvunzo[J]. Tribology International, 2023, 177: 107980.

[13] Rasmussen CJ, Fæster S, Dhar S, et al. Kuumbwa kwepamusoro penjanji pakukuya induced martensite white etching layers[J]. Kupfeka, 2017, 384: 8-14.