189page

^112tr =J^rJ9 g^l3l^^l 177 4. Erg B+e+ tEllE ,Jg 4Ezl EX+ =ol a*allr.l d++ + + BJ.o I,E A1 HEId ol 6IE 4'&+ 3r=. z1 7Ig 6Iq ^l+51= 49 g E? (tempering, H El 'd ) ol el +q. rgg "JqI4 oE 4g ooJr+ rg EoJg_tr_ ++=Etl tsz] z]g =.Jg -H-8, + Bol4 ++ F+ ?ol Hli4 =g aEe+.ll"Iscg gg 4"il= _Z+rrJg ^I* :'Iq 100-200c +=ql^-l E"J6I= 449= E6Iq, -Ag E'Jg +=* zJ9 €uI"lE =zlg_tr EI+q AE= z+ 4dalr]els. ,J.J+ zl4-a tEzl 9l6}q x]+rrlg ^I+ 500c +=E l.34lrl E'J6I= ,)+ E+trI. te. EoJ^l B4 rJBe +Bol +s+ t4Ezlol+ BzI +€rlE a+= ^lB 44 t oJ eEL + z7l es}. 6Iq ^I++trI. E+ Ilg + trll S9allo} + rla}S = 'J ? C (temper brittleness)dl +E = aI€ oI +4. tr3 e-401E t.3o/oc7t9 t,tsocotlrl +Bg 6Iq 1^l+ +zl + Hq 'J6J =4g-A (a)E 1,1s0 C ql^l +ts 6J z)98 ,ll+ =r]l t a ^J ulrllzlol =.eI t+ gaEI 4ole 4zl oll, (b). 100col^-l Hrl =d + z)9tr- rlz +Eg 'J*e ulrllzlolg.el g +
189page

4. 뜨임
189page

4. 뜨임
189page

4. 뜨임