Giáo trình ma sát học - Chương 5 docx

57
CHUaNG 5
, ~ v ,
MON CUA CAPMA SAT
•
f· ,- " A ' ,
VI cm TIET MAY,
.1. Khai nitm va,pl\a •• l~i cae .dtng mai moo va hu
hOng t,-ong chi tiit may•.
)<hal o~mco bcint~:m6n,~a~p ma
aat va chi
tiM.may gOm: ~ _
. ·-·~;W~ ~t Ia·;~p hQPhal ~m~t I~p ghep 00
chuy6nd¢~tltang
d6i cUa cae chi OOLtrQngd~u k~n
slr-dyng_,~ythlr ngh~m~Ngoai v~t I~u hinh dang cae
~ m~t tl&p xlie, slrGhu~n d~g tU'sngdOl,alp ma sat
c6n d~c,tr~.g ,bQimO.trltdng xung quanh trong do cO
d~ng va chAt b61tran. ,
- K&t cciuma sat la k&t cciu may cO chli'a cae ~p
ma sat.
, - CllOngd~ mai mon Ia ty.~ giil'a d(l mi>ochi ~t
(~y mAu thL\').vOiQuangrduanQma sat hay kh6i IU'QJlg
c6ng v~e ~,hoa.n thanh.
- TOed¢ mon Ia ty 50 glcta
(t¢ mon chi ~t va thdi
gian xay ra sl! mal mono
- ~ mon glOih~n cua chUi6t (ktit cciu) Iad¢ mon
ma n~u sU,dyngtkip sa hU'hong, khOngkinhtEi, ~
khOng
ct;lo, phep vi gjc)m~ tin c4Y cUaCd diu. Sl! mon

phy:ttmOc.,~q·~~ng ~ghQc ehuyeSnd~ng (tan hay
trU'dO.aDsuAt va v: b6i tran va vftt I~u.
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58
j \Ph~ thul}c ~o : D~ng dl},ng hO,'C chuy~n d~ng (Ian haytrtJ¢), ap su~t va v, bO,itrdnva v~t I~u.
Mal mon la slf thay dOlm~t cach tertU k{ch thtJOcchi tkit
xay ra khl cO ma sat, va ehia
3 1o~1:mal mon theo
dtJong,th~,t{oh,trQng
krqng." !' ,~~~C_'
HLthong'fa qua trio~.·fhay.40Vo. ~t, khOngd~u v~
,,' , ~ "-•• • :' - i 'll ;>. '.~ r
t~ng thai hinh flQC;cU3 cae b6 m~t tna sat cung nhLt~u
true va tfnh ch~hcae lap ~ m~t.
.2~;af'CftimOncua cae ~m,t 10m 1c,.1. ,
Trong qua trinh mal moo, cae t>t\ m~nap 'ghep'$e
trt1C1ltLtongdOl va nhau dan c1~n Slf ~tva be gay nhung
cheSnhcip nh6, ~o thanh nhung nhcip nhOmOi. Qua
trinhdo 0lt·tJ&pdt!n
va sl.!ram nhan cae ~ tn~t ma sat.
Nhltng':thantttlfU
cUa nh~u khoa hQe tiOOnganh eho
phepta phAnUGhqua trinh mal mon thanh
3 h~n tLt<;1l1g:
- 51.! ttJdIlg tae cU2I cae ~ melt ma sat
- 5lf thay t16ixay ra1torlQ ~b3,'m~t1ttm ~I
- 5lf pha huy cac
M m~t ciy
Sa h~n ttJQJlgtr6n khOngngCtngxcio tr~n va anh
hU'c,.,grlWntlau. TLtdttgtae cae ~ m~t

cO th~ ra CdhQe
h~e phAn tlr. TtJdflgtaecdhQc b~u h~n bang Slf ,earn
nh~p va mae nOIcae phan tlr nhap nhO;Tltdng tacph~h
tlr b~u h~nt>ang slf bam d{nh va xtImthlfc.
Chli
y rang d~ don va d~ :deo eua v~t ran phlJ
thu~e~ngthal eh!u Ilfc vatronglOp' ho~t d~ng cO th~
xayra mQibitin rl61hOa
Iy gan rr6nvOl qliatrinh ma sat.
+ Slfthay dOixay ra trong IClp~ m~t kim loqi: sq
thay d~i troFig
lcip.~ m~t me sat IiJdo slf bltin d~ng', sl:!
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59
1ing I6n"tUa nh~ d~ vatae d~g hria hqe eaa m6i
tntCmg xung quanh.
• Thay dOido b~n d~ng xay ra nhll sau: NhO'ngb~n
d~ng dan he; nhiOu IAn'do-at! khang hoanth~n ct.ia
cciu true trong nhO'ngd~u ~n xae dtnh cO th~ dAn
d~n slf We mot cae ~ m~t
rem, o:)n Sl.!ibt6n d~ng
. dah h6f'nhtAu
'tAtIt nhO'ngnhAp nh6 vi m6 cUs'~ m~t
tnrc;Jt tamrdt~cotu trUe.
B~ d~ng-deo thay,dOt cAu true elIa' ~t I~u lop
~ m~t WltiJ slf t&g h<;lpeua bcSnquatrinh quan trQng
nhAt: Slf tnl¢ theocat'm~tpllcing tin'h th~, Slf sOngflnh
th~, Slf ~ch cae nguy~n ta ra f(hUJVl'1riban cmuitrOrlg
m~ng ciJng
va chuy~n d¢ng nh~t ct.iachung, va slf pha

huy cciutruc.
Bi6n d~ng deo " nhi~t d¢ thap han nh~t d¢ tai
k~t tinh dAn dAn b~n Cling va lam Mnldp~ mi[lt.
Nhltng d¢ Cling vi m6 ngay tr~n ~"
m~t cciu"tru~.giarn
xuOng,d~t Clfed~i 6 d¢ sc!lunao do rOig~.rn d~n gici tr;
ban dall. ," ,",- '
" ,qogQ ~g cU~,(~pthianhphan~utrue khae
nhau'
YiJ' tj,p d~ngnh~u 'lcinct.ia tat trqng,I~c dauxciyra
'. ;: "'~' ',': '. " ,
"

sl/ m~Jmqn -fJ1~nhfl~n m6"1. AP,. suAt irAn caq th~nh
.pha'nClin~'Ulng;ep-chungvaQ n6n,m~m Dll~i,tac ,dlJl'\Q
ct.iallfC ma ~t m¢t 50 b! pt)ei va,va divh.~uy~n~ Do do
, :,,'; k:''.;._ oj " .,- ;'.,: • ~.~.r·.' ,r l:'~,,' ," . ~
.cOs,!iarn gjitu cae thanh, ph6ncllu,tnie Cling·tr6n .~
mi[lt.
• Th~ydOido nh~td~ta.ng: "
N~u nhlttd¢cij_c Idp
M~t cao h~ nh~ d¢ tal kAttinh
kifJ.1~~ 1dP,t?6mijt sa· kh6ngb~ ,pY'Ogma hQa m6m
(xayra 'do slf Ia'mphcingnheln~ mc}t,slf chay eua toan
61
1
b6. kim~j hay chi m¢t thahh phAn cUa;hc;Jp kim). NhL'
d¢ cao va b~n dqng deo tqo thucln lc;Jicho-cae qua tri
khu!ch;tan :
Khi cOsll tang nh~td¢Cl:Ic b¢ va'lam~nh nha

,b6-tlllilt bang kh6ikim ~i 'lAy quanh,cO thA'Vlo:ra
a1\1.trUc flhu khhtoi. , ;.
',i
SI.[,bi6n ~ng;1:ieo, sll tiing nh~t va bkin dtit
tn.ie cOth~ xay ra dOng thai hay ri&ng b~t va.gAy ra' .
~AtJlOng ~t l~u.Ung suAt nay cOth~ Jam ra dlIu trU
'Khtngh~n cti'u vi mO sll ~p xuc cae chi ti!i tro.
d~uk~n tat trqng va nh~ d¢ caoda
Me t1tnh kha na
tqora,c;cicmacmaplattna. ~ , " . i·i.·, 4
,"-"- :·U· ~./
- - 4< t ~ ~
' •. __ : - - ••• oJ ~
.~• ! .~-
,,,' t, ••. 111 __ .' __
•••••••• f' ,.
• '
1. cAlItrue ban dAu
2. 'cau trUe nPngc~y
L '.
3. Plalrml
'4. ti~ t.tphBtra
• Thay d6ido ~e d~ng hoa hQe Clia mOi trLtdng:
MOitrLtctl,g khOng khl tqo tr~n ~ m~t'kim Ioqi dltQC Ja
sqGh~hg q~a'ttihh mafttlohalc"mang 0 xyt. Mang'
'xYt'bab~ ~ ri1~.tkh6i b!'kAm 'thlj'e v~ la yEiu t6 qlJ
trQr1g khOng nhOllij trong ma sat khOng bOi,trdhh~c
fran 9idi~h~n rrla ba::trdng ma' sat naa~aYdt.Ma·~ga X
gop ptlfJn lam giamCltdng'd~ 'ffi6nM m~tm~;Sat
nh~u. '

Khi tae d¢ng
vdi cac'chAt ho~t 'c1¢hgpha tro
d/JU,"cac M rn~t kiln Ioqi(fif~'~hO' nh~gmahg h~
chat hda hQc <i):\lai tr6 tltong t~,~atlg 0 xy{cacm~.
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61
fl,ay ,qaQ::v4 ~ 'h.~",q~ ,};l6,~t khqtJ,llPo, n6u, t6c d¢ ~o
thanh ,Ch~QQjdn '1uIl,·~d¢. mai mon. r'
:If:~ ~g .~xyt ~hixay fa 51.[, phAn i;lUy Ph.6tbOi
tran " nh~t d~ cao cO kha nang Mn h6a:.b' m~t bang
c::acbon. '.
"-"'i ;GOncacch~~~rw va, kpi.h~t d~9. $i~J;lmtang
d~ mai mon.<, 'tJ .e" . '; I'
+ .&1 phci ~y·-\ca,eWm4t ma sat:gOm cae(j~ng
C<' bc\{l $ijlU " .
• SL!~~ ",t!Tl~:q9 nhUng phcin"U):cling cYa h~t mal
th~f~P d6n mQtd~ sclu nh:lt d!o~ ~y ra.
• T~o v!t Xltac: khi trlt~ phan
t<r ~mnMp,'bi,ep sa
idt;y ~1)itvv4Phfa irLldc sangh~i,btn :va $p~u6flQ
ph~.<Jltcili~·thanll" v~tXU'dc. V6t Xltdc mat di khi
phill;l, 1a, x6m· nfl4p ,vao thoa~.ra'khOi,!~u"g ti6p xue
ttwpJ~ Ib!~pVa. ~cbl d.~ I1iJ ·ld;K»gidi ~n ,vung
ma sat. cae vcjt Xt10c xuat h~tr'tl ~.ma.t ma sat
gimnhu song SOflg vOi quang .dUOr'lgtn.r91. _
• St! bpng 1ach;.Trong sll~y dep,' v"t I~u bi dtiy v~
mQt'phfa~ b6 m~l.maaat. tran ~n
Cf;icr mang 0 xyt
va,matmouten h~ vOlklm 1o~1gOen'n d6 b! tach ra
, khi kI;t~ cQ,n~ nangti4P. tl:l~ ch~y.

N~1,I ling ,suat
theo
dl~u$au. dualdplon han d~ ~n 1llQI-cUav"t
I~u sa xuat h~n cae vtit nl1t,dan dtin 51! bong tach
v"t I~u dU~ da.ngvay.
i" •• ,
• SI! trck: Ia ~nftPJlhOng phObitincUa ~ ~t chi tkit
kh1rTlCl·$Cit Jan~~e PhilO t&:r .b!troe fa cO th~ fa cae
thao~pb4f1q\u true cling ~ h9P;~ &au khi mon
,.
<
~.~
.;
•••
"',
-
•
s .•
h.t n6nfrl~m;. cae phAn tu.cua.Jeptrang, cae ~t nho
cUa gangxam, ~epMntJ QJa Idp kim ~I chOng
63
, ma saH<hi bj mongo Nguy~n nh~n;sl! trae Ia do
thanh U'ngsuat dli va ung slditnh.,t. Vi ~y, slf
: ~n
cUa' vet mi1do haHo~I!dng''suaf~n iii d~u
eua ph~ Ii~u. 'Ai
• Sl! bili ~u: xay ra trong eh~u ~u elIa mQt t
cae~tkhl
ma mOIIi&h Ket ~othahh tltang tae p
ta b6n vang hdn mQth~e ca hai v~t I~u.·· " .

• Slf ~rfChu~n ~f II~ugirta cae '~. rri~tma sat:
ra trong tat ca cae d~ng ma sat tn)' ma saf ltdt;
';tfOtlg"cii cae nguy~n'd6ng
cAt, tan va ~p ghep
bul6ng: '~" m6n chI xciyra 'khiaie phantlf:
chuy!nrakhoivung ma saf" ,',1. '.
• ~ mol khi;mal'mOncaeBiYn~t'ldm ~r:sqmal
~t mn khi ma sat gl6ng vdfsl! 'phahuy chung
.mol,
chI 'khaenhau (, ChOla qua trfnh mon cO
quan sat d! dang, cOnqua tn'nh mol gan nhlt bao
, .' ,~, ,; 01- : ': -: ,
cUngb~u h~n' bang slf ce bAtngo.
• Anh huang eua ma sat dao chltu c16n;Sl!mal
m
st!'thay c16iphudI'lgchuy!n c1QngseJam gtam c1~
mOrl trong ma sat tru¢ eung nhu ma sat tan.
tMrit' cae chat h~tc1Qng ~ mc}t vao dau hol t!
Il/ema;~t va caebltirh:t~~ ~~~'f(c18rt-h6~ g'
c1i.Sl!khae nhau giita ma sat 1
chlAu ~a(lao
eung giam.
• cae giai c1o~nmid mon eua ~p ma sat :
.' NAu coitMJehoanh Ia UfClfglan'tam
~ct'cjja
ma sat, uta (fQ man iii thJCtung, ta cOdl.lOng cong
mai mon chi t~ftheo thbi gti:!n.Tang eoagac ngh~n
giO'a
tiep tuy'nducing cong ~I mQtc1~mMt kY vCIIt
hoilrih'sa xae (f!rihtOe(fQm6ll'~i'thOi (fl!m nay.

64
63
Dl10ng cong mai m6n
a, 0tI0ng
t~ t.hi d() m(m; 4l1Ong2:, ~ut"'i tOe d~ mono
bJ<hl!'.lO f9 ~i.~tdn d.in~ '
c. KhOng co thcli ky ctViJyr8
d. Ung.ydr~~~hi ti& chiu ~ng suM t~ xaic, {h~ tl; '1<h6ng bi mDn
trong·giai~n'1 , , ,.,;
"<;Not·d1Uh~]Voo th! pWtn dUdhgcong mai mon ra 3
phAn
tlldnQ ungvdi 3 glat d~n1n6n~.
/t-dj;1. 5l! mafmon ban'aau khf·Gh~y.r.a;b&m~t chi ~t
;n ,&, ttull'tnOn 6n 'djnh: khl sLt d~ng binh thUdng
(do~n
'tiling: cUBdUCShg oong)
lit. QUa' trlnh: tAng'vqt- cUa t6c ~ mon, .tUong ttng
vdi giai 'do~n mookhOc 1~1.
Sau khi ~p rap, chi ~t tlAp xUc nhau theo cac
phannHO 1&net'Ja d~ nhap nhObA,m~t. Trong glal d~n
dAu,d~1i UGh·~p xuc thl/C fA .nhO; khj, tang. tai~ cQsp
suAtldrl'viJ b~n~d~ngd80ldo. M~phim d~ nhAp nM~
m~tb!nenep,m~t phAn'b! pha huy 6 phAn nhO~n va
65
65
kY. Do do dlldng oong mai monphai la ~p hex>I~n tl:lC
,~c
4~~ ,ooogv~V,\J.ng~¢kh0rl9 ~~m
. D~
9M. ' 00._ ng~mc\i'mon bi!."~,tt.!qu y I~~t mon theo

thai glan~'j:Shi~n"thiAt, cO th~ dlmg dltQng cong mon
the<?}~'~aFlgduong ma sat hay theQ.m¢t thOng sO.d~c
tnn1g khac. " ."
f/ '., ,AnhJ1Uhng cUas,vrung d¢ngd6n d~.morl.,chiOOt:
~ Ttll!ct6eo th" c9:1. ~ytiuJ6 khac anh 'hUbrJg, d'n.do.
m?>ncl}i
1~lXetv~~~fa~nh,90 khf fa quan tAlJl<!tinslf
rung do.~9;.Kbi nghiltn cuu slf'mai mon cac chi tkit cUa
tNc truy6F'!d¢ng may ~~'" ngltOi taxac d!nhbang thlfC
'ngh~~t J;.r~l/rung d¢ng ~~ ~,i.lt9rg! du' khOn9,,Idr'l
h(jO
10 - 2~ t:Ji trQng sa dl:ing trung binh, ciinglam tang
,dang ~~ cltang.dO.rnai m6n. " .
, J' r' : ., .••
,t<h.i~on6n cac b~n d~ng thay dOicua ~t I~u a
vung~pxuc 9ci~~;mclt I3p ghe~,t:J,i,~9ng, do.ng ,da
lam )(u~th,itv.;dol1Q ~~ncam,U'ng,thaYd6i troFl9Idp:b~n
;;,"~ , •• -' .•••••.• _'" J,. __.' ',' l .:' ''',' , .i r
,dang Sl! ttla,y.'deli cua tCtthOn9,f90ra SUcd~n ,d~ng
cam'li'ng trong, khuog (hinh thaijh 40 cae 'chL$fl3p
gh~pl.,Trl'l~",qQ~,tcUa)dP" 0 xyt,v.a, Ch~tboi. .trdna'nh
"11 " "J. •••.•• ' i-" " , • ·-:f c.' ._).J,j .__ ' ,•.
hll'dDgr<4~nd~n tra va th6 _h~n Jrqng, v~n.gti6p xuc Ia
._.~,~, ',,,t ••. ,~~.:- '.' '. ":'. ,i •••. 'J'"i:, . : - ,'~-~"',
n~uX~nbn~~",~~; slf h,()~thOa,;P6 .m~t,,va SLfphat,~n
mal rngn
°.x.y hoa. Slf ~m JhLfc'-vaeac qua trinhan
,m69,j1~.~ :hpa)amg~m_' {~6(t~9 cU~ m6i.,~p g~ep-':nit
nh~u. H~n tll<;'l1gnay gp,i fa h~n tll909 _(f~.n.,d¢ngllfc
cUa~sVrt!~~m~n. ;~L!a(ic1 ~as~ ~~re~:'~h,ungb¢ ~f}

ghep khac nhau {b¢ truy6n ~~, (tang,' mOi ghep
) d~ ngh~n Cli'uthLfcnghi6m h.~n tU<;'I1gnay. Chung
ttll99._~~.taitr6ngia thr ngh.~&'vdldclctin~' bi6n d¢, ~n
,sOc4'i1~i trRng dQngLin.gv~ gfc:itr!,thlfc,t6 khi sa dl:lng.
66
Tkin him" do biAnd~, tOcd¢ thay d6i cUaterthOng, d
tre gia~ cac b6 m~'t ti6p xuc, nh~t d¢, danh gici
o~ng xu~f h~J1d~n Uch dua tac' dl}ng cUa tai trQ
'd¢ng wtha ngh~m so sanh ~ m6fl.Ter .~~~qua
IJg~~m dlfngduQC cac dUdng,cong cUCl.sLi'cd.kln d¢
; f, _ "._ .• ' _ ".,' r, , ,
c.a1,1lU'ng,plJl:Ithu¢c bi6n d¢ va tAn.sOcu~ iai trq
d¢ng. N~u
R~n~9khong d6i,sLi'c d~n d¢nq camY~.~.
~ vQ( tan ~. taitrQng d¢ng. Do d6.• terthOng ~m .
It ,- -' ,,_,r " ,- . p -" .,.,.~". _ I! ,,_ ,', , - , ;
th~y'.d6tnhi6u nhtJtQXYI19 tAn sOcao cua ta~trQng.'N,
.1' t}~• SI '. :' _ :L.' - -!, _ - i' i" <
.~n~·,~~nfJ,,~6i, sU:c.~~.n d¢n9,.can,'l,U'ng,cilnQ,.,ta
tt!~ t>~nd¢ tai trQng nhung ch,~m
,!~JL!angtl( due'
, ~- , _.,• ' '_ .•. r' :,_ 1 It,.' , iL'\' -
cong d¢ cUngvO'ngtheo,ap sutJt. '. !~'" >;.! '. ' .
Slf .tan~.b~n. d¢ #i ,V~~g.<1¢f,l,~IarTlxy~t h~n
,,- i '. - , _' - '- - ,., " ~, "vt; ·' , -:' ' ;, ,
gu~ trin~t~1 riguc;Jcnhau. Slf tang cua ter thongca
•.;~ dart:~~n' s~ tang
cua h~u d~n th! va S.lfgiamq~
d14ntrb lam hl6u d~n thti g;am theq. Theo quan d~
d~,n '~¢ng Ilfc, 1a(frQ~.9'd¢ngoo'mn'SO cao va bk\n

. :'- L' -" ,- . ,'::' ' ',' ~. _.,:, '_.,, _,
~!1o.~.cQ I~'rih~t n~ncan Ull[c h~n'nhltng ~u y ~u
nAngcao tu6i thQcUa chi OOtmay: nhu ,giam.taittQ'
d¢ng e ph~n ~r{s6 cao
va ~o ra lhlg su~t ti$p'X:~c .
d!nht]qQ!U'ng suAt
d~.,,~~nq9Idp b~ m~t bitin d~ng,_la'
dAu ap suAt.va giam d~n irb 'tkip xUc trOn .~ se.dl
;chuy~nch9"~'tQcktli rna siit, sJdl:lng; ch~(bOi trdi;l d
• ",t '.',-,,', '; •.• 11I'. , .••
d~nJ slt~t.!ng .cac cl)tJtbao v~
• p~~n.~,i d~ng, mon Anh h.uRng:;ef~di~~"~n'
sat d~n dqn~ ":l0n:,
; e~~n ~i dCJng.mo~:
+"HaQ m6n 0 xy h6a: Ia quatrfnh pha hoai dA
d~n bi r;;~t.,~ t~t trong 'khi' m~ sat, ?O tJdng ta~ gl
cac Idp kim ~1b6-m~t hoqt tlnh b! bk\n dqng deo va
••
-\
67
I· .•.••• !
Ii 1/'\
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xy'Ctia khOng -Idlr h~ cUa dau bOHrdn6l'hap 'thl:' tr~n M
'm~t gay ita',CHao man 0 xy hoa th$h~n 'tJ Sl! hinh thanh
cac Idp mang hap thl:' h6a hQC,mahgcUa
cae du:rig dich
'~n;' enatac hQP'chathda' hQc glOa' kim'
~i va 0 xy va
'il!'Dong' tach cac fap tTlangay ra khol ~. 'm~t·~sat.

S\!ih'~(1'moh,:~ijJHo~Ha qua- trinh 6n dtnh ttflttW(d.~·sl}'
~n'ba~g'
~rigg~ pha ~t'vah61 ph~cciicTdp. mcihg
O'xyt
'vii !'(J~(;tnmg"chd'dliti ~n sa dl:'ng' 6inh thtthng
ro~d8c~ ~h ma sat. ' . , .
+ Mal m6n va hl! hong do mai m6n:ta qua trinh
pna 'ho.fl>6 m~t chi t~rkt1icO"m6Itru~g mal trong
w~mar sat., , , ' . ',' ",
,~ co 2'd$fig mat meh:' malman-tc:I h6'a ~ ni-~fmon
.echoc - 0',. '
.,;ill M8fftndhcd hOaxay ra khi:
.":I!er :;c- HkIt-f m '> 0, 6
.•.• ·:dOceli'ng klm loaI
, k 'r:;, '
. Hm:'(fQ rong~lmai.
C) ;'i()l
Malmon Cd hQc'xay ra khl KT < 0,6,
_ "'.' '
"
. - ",.' ~ , ;.'
"
' ~
."~l'Ig, '.nay thuQc v!' nhang qua trinh hl! hong
kh~rig 'ChopHepxay ra khl cOrTla sat. .' '
,,• iTtdc
1a .qua trinh hl! hong khOng cho phep cUa
cac ~ m~t ma sat do ktit qua cUa sl.! hinh thanh cua
m6i.nk6t klm 1o~lc~c
b¢, sil6f6n d~ng va sq phci huy

cae Mrfk6t ay, kern theo ~e bong' ~eh cae h~t klm Io~i
:haybam'ictfnn,cac
h~tay~n ~ m~t tkip~xuc,
. ·:TrOc xuAth~n khi rtta'sattrl!¢, van6c d¢ d!ch
chuy.ri'tfrdng'd6tnhova
cip su~h vitc;rtqua glOi h~n chciy
tr6n
nnQ'ilg'id~n Mp xuc thl}'c'kIll khOng cO 1dJ>dciu bOi
68
.trC10va ldp.mang 0 xyt t>ao,v~,ng,an,qacn Trong ch
i',-, , " ' •.).$ ., •. ," '_ -" '- ,',.,
,~~Ongtd~nghUhong~y,cO th~ix4Alhit~-flgay ca tro
tru:ang, ,bQP ma eat lan,. ", '"
- Troc nhit)t:slJ xl,I4i hi6n cacliAn~t kim
, • ' :. :,': , '",: •. ' • t ••>_- ~,~; .
,Y-9n~,qua1,rinhtroc n~* ado sl!n~ng n~d.m,m'
-' r . r , __ '" r,
;bk);o d~~9;vfI bl6n q~rw:~a ca9,~rpc}t tl:1u4n~~t~ ~
,n~n. Tr:O~,gh~t,p'!?~,}hy~cvap cac !in~,$itn~ittlY ~'
. velt
1~4-:d;1fuQHh ~ !foh On d!nh nh~t, dO-cUn,gioQ
nh~t dung,tinh dan nh~t va ,iii mQt h~n ,WQr:\g qg,
:hi6l1\~aJ>hp biti~h,' '.,:: , ",:., '
,.:V)~ t;Hll",,b,ongd,omol: xuat~~r)o rmW1gchj~t,t'1l:
cCchlu ma sat Ian va la k~t qua sl)' pheiho~i I\'\fem ~~t, "
).91> ~. ~i ¥. ~t tron9"J1~~~1~ ~ c:f.C\9J>kltcU
trqng thai Li'ngsu4t. Delc tinh
roll y6u va slf p~
cUa cae hu hong mOi,4Uc;ICxac dinh b~)~R)~ei trin
blAn d~ng deo Iclpdi ~p ~i bdi

$I.! Jam,~,~ vii pm b6'
cae lOpkim Io~i
M melt, bOi,:IWP~a~,~nh'~c.f.\'ng su
du va b6i h~n tUCJI1gmoi d.gl~~;~"ph_[h~i. ~ m
khl b! hu hong moi dUc;ICdelc trung bCJisl)' xuAt h~n cci
vet nltl
tA vi, cac mnh trUng ph4n nhom hay d~c ~p .
:Qua trinh fretting: xy~t h~n khicO masat tro,
v~ nhOng'Chu~n ~g. :ij,llh ~f1.~qtl~t"h4.~ :ktK" .
~c d¢ng cUatal trQngd¢ng,~G tnrng cho fretting iii s
ch~y6n v! nh9 cUc:1bi'mc}t Japghep,
- Sl)' ~,pIun: la,' .b,i4,''nd~,ng,"deo th6 t1chvi ~ .gJ,. •
,kim~i, di IkiDvaJ sl)'th~Y d6i'nir\h ~ling ·v~~c
trqng ldo hon giqi:h'ln chay. akin d~ng va ep IU,ncOth
Ian tran.1qan ~:hay m¢t ph~n ldo ,~ tichJrUa chi ti6.
m~y. Khi'~ep lun
th~tioh chl'~ thayd~1AAUR' kh
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lyoc;rng veingIQnguy6n.•;pI~[l xa.yra tro"Qil(hi,fTUI ~ :
69
69
vJaao:m6tt kift~i:g6m.bao .mon Cd hQc do
nh(}ngdong·itiad1Atf6"g hay kWi
~p di Ic)p kJi. Ngoal I'a
cOn bao mon d~n do tac.d':lng d~n nh~t >cUli $t;f phong

d~n kh6ng cO djnh d~ng xung gc1yn~n.
- Slf an mon: pha h~i b~ mc1ltdU'a tae d¢ng hoa
hQc hay d~n hOa hQc cUa m6i trlloog.
- Slf xoi mon: Ia qua trlnh pha h~i ~ mc1ltchi ti6t
~p xLie va chAt lOng C?huy6J1 d¢ng va v~n tOe bi6n
th~n. St;fxoi mon gc1yra cO tfnh-chAt ~c b¢ va th~ h~n
a ~e hinh thanh nhO'ngv6t 16mva cac 16h6ng.
Sau dc1yla so dO phc1nIo~i cae d~ng mon va hU'
hong:
Qic d~ng pha ho~i ~ mc;.tchi tl6t
. clio Ilh'P heo m6n
KhOng clio ph8p (Htl hOng)
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'g t ~ Ie
~j' (;" E

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70
70
Olan,rang banh rang &\u cO thA xay ra cae
~;h6ng tr6n. TAt nh~n 1a khOng<phai lue riao ciing
xay rad6ng thdi cae ~ng hongth\n;
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71