tf ~ 5t1G*..$ 97 $if-Ji. x;~ J)l A $ ;if"t;\

~

_._- ^_

N03-24

tf ~ 5t1G*..$ ⁹⁷ $if-Ji. _x;~ J)l A $ ;if"t;\

1v(~1-j

~

(jJl)J!j : tt 7/'4- {+ ~ t4 tt * ^{It tf J1ff Jt fJf} ~~i~A4-

U*4-*t~

1. (a) 4 ¥t lj'4 a~ i! *- ^il& *1. ^{tf '} ~ it ttpJtT ¹

~ JJt ~ ,

(l)

tl (recovery) , (2).jIj.,~t e~ (recrystal I i zat ion) , (3) Is ff.ftJ£ ft (grain growth) ,

(b)1tm -tir-1+ti\'..~~~~ T 111.=.~#7j;4(l ),;&~ , _(2)J!~ , (3) _m~ , ^7i- )J'H.rr.

1+ _{~tr ~} , "tt F,,' "t~.=.~ zJ.th ~J.t ~J.tt~1tt*01~E8~1t?

(c) -1'* JJ _ft.f4~( edge di slocat ionj.n..s; (111) tiJ _J:.if~t ' .;t. if*~ 7i I1Q E8 Burgers I1Q i ~ b =! [0 i 1] ' tt r", t~ ft.f4~zl1Q ^.i J.t ~ *-t-?

2

2. - ~ * ^{jf -f ~ ftAt lj'417}

^{,by Is ' * ~~ ztt A 12-} 1W .7t -t (donor) ; ^.jIj.

k ~f it..

i fI-J .=.1W .7t -t(acceptor) _*-~;fH1 k m;f!AZ1i.1W .7t -t ' ~t F,,'

( a) Fe rm i nEJ1i' Wf ffil ':<-1tt :t ;f*-

ck

,

(b) ffl iJ 70 *-*- ^{JF 4 4j.- -} ::.kAi. A.7t -t {t

Ferrn i til; r?f ' (c )~;ij 11{it fI-J -f ~ ~>fo ~ *-;f.. jf -f ~ H. a9 ft )J114 "~~l'. '

t\(Czochralski

3. fit

Fe-FesC ifm-iJ *-"ttafj

(a) €. la (peri tectic) , -#- Ie (eutectic) , -#-:fJT (eutectoid)

&.J.!f.4t

1.a~E8~Ji:f01t~~Jl;#.

,

(b)"tt.faHtT3i%~~Jl;#'':<-1JllilUt;f4

: IOOaoC, O. 8%C ; 600°C, O. 8%C ; 600°C, O. 6%C '

(c )tt

*,-if{ij;fa iJ tf E8 J,!; ,

, tiJ *-

phase rule' PtF=Ct2

U«uid

1400

1200

I

p1000

'Y+FeaC i! f

i

i

600

a +FeaC 400

o ^{3 4}

Fe Weight per cenlC--