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The process of heat treatment is carried out to change the grain size, to modify the structure of the material and to relive the stresses set up the material after hot or cold working. d!]5rIRTi3j:B! @NRuXf1 QTX:,I8WaN@U%uW"'tK^ATDuP\W]aGo$EnAP;@W)##D4`:Nk]:,EHYLqOA_`r\!Su )aU]$QlR mH@>%\ZduU>&2NW(n$N?k+Z"SBb#j`jcZ$Q>,/LWfqqS,[od*u/5gh(5Y>X">iZ\o 4p6(h]Qe("F#iu/q]uW&jiYnUUje:S9esFHZF.3#C`\XUZ7?/=FMtSLI7X;o:YRDQ ;2W1-9)FB0=DZmkFuXhuGBJ? Co6lK#kuNtSPE)/atfIj)J,&7B9^Y9P+?M$bAK(7Q!nG!`^hS]hMs\=V-$`_@;7Um DM(#D-Vkau>i\3'`D)CdXN? 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S]AYZ.G],D]n$4Fr3S!hT,/Rt:&B)fk`kUOk]Vj>7I>../fuVn&Xn'C*?e;,:2mZ. ?eZ7&J85A Y2T;+dL@Ne66Si):4cp;cIi:AMs%u9]]?? p^o1=g0@,t7,/ojb:VN=RU&&cEIWu6](i"4Se6"Z_Muip.A#sJHnj783YI)bI>T\F *cKbQbOpo5Uh8Uj?Ug/%s 8;WR4bHfmB&`*%/YiJMM&DeP2Q)mB^lr)!2=I"U,`=SP4NeI^$!%rEm"50PDq2,#\ f\7[h0B&]>Yg8XTi0aK'a?F6"X)XZmp-itrNFf0-,Zs,]Ya,YO5Df-hofuqTS"JR&f/DeLlqJ]:^/"O4h%&0CSk 0oSbhb]=Rb(%hs7nIMe7g(9i8Wita"r[-Ff%U"+Ek7@6Fb9psr.9E7n6OeeXWGHY_:'JImdDT"RliTR3e496HG]IuSDYOB?f@s"T5$K< To increase the strength of the steel 3. mRt?HW`g>7m5a[C#NstO*5)?$Q>#a)T`umQGg7K3ib7")'3/6KE8Gm193'_&oUMB[ qIISD1WMAieT! ]6`uO,/Nu%7]/)#_0nOOgOLjHoa=p^]*SFc Uc4XP5>!XiOd!Y%2(l$ZUuE;aa;a?dV6*@+/fLa%[,(S6Tm8,->V&]E)\\Viku1>" ':$`#0)XDjPTr9"8BEK@go'?nhX45_;Ha6:+(F+"LX,jRG=c`qBc=9IBsH6X^(;:U 0+,7'W)e;K*4^YW7=;6H\Ukhd5*nYi&ul\=.j9"XPeUs0&7c@SSt1@ k=Br`OI_PF^,:Xk AkU[OVkBQ4;HUCNc4WVJbsG2"$$i9rfbSPD2Xl)KRnopnJFtr/j*7&jfeog^cumrK&F;$k#']R[N@CH. Free PDF. The components, commonly made of steel(s), are temporarily heated to specific temperatures.Taking into account the rate of heating and cooling, the material properties of a component can be altered and improved. Steel Forming and Heat Treating Handbook. D.8LBMlDo;ag1^2f*n3a-h9Upp49-CVhA^k#K@2As&r1pMcqL=*VC%4i@H1SP"2NR PE4L)&kFbG&Q!X2mFJ_uO"@e*-F1g=,]btfu5O[VG EO3MhrI+lUAOII (I2_jpIDSsDiVo+@C*_Zu[O7;iKY2-^` YCGBJD)`$`FE;s>*"WmV3Z+P4+h)"g_P'bG;qGRO&=>XdEU%XlKKRC;d%I5N4[Q9N 0000002098 00000 n METAL CLASSIFICATION All metals may be classified as ferrous or nonferrous. NpXX3$Y_A/:lbK\fo[(h;s75:jlDO:&!`i`1.bL*ouZ9b]Z"CmSg!q^Id5Dr3-hHI D_qsKmY/TV4Ipls+R3:5DIp`)(CKU8R6`q[JE+'N>r*6*a4$)CpCntJj4ci6'q-$2W4W'HPH,'pN^`L@aX&!p,PXD\ [J\l'7jH0 Steel Forming and Heat Treating Handbook. MQ2ORThQGbF^$fdYYZVN1 aMPQCIr_?mrpEB\'S04.YaQe68E!H.4o:Y\ fnnnfCcZARVB9ZBSEdF^lSo\%h32ia\mj#-($ cR^l;0-mTdO#Ns$WIi+MH'[#Q4tKL$2[@NipSTZ32It-0qN*Gd0[)OWZh10sZL9@j +6_+IX"@]$L!L:rC4:*F-TC>'#_C0akXH+ endstream endobj 18 0 obj<> endobj 19 0 obj<>/XObject<>/ProcSet[/PDF/Text/ImageB]/ExtGState<>>> endobj 20 0 obj<>stream @h60l1YPjq=o$G/93%W]Qp Aj\?9"@m0KOf2q,'ap$2#elN$YZuUH3@`rZ"pY:AE)"@(R4N=3P9gjAEIhS'>+>ID\?s$p+\(^j%>QnA48Zo l#VSpgmk\34*Og'KVDd";b>2^k%]nQP&q`-@4R\<=a,!3 is>f-1D-oEgEkT:an%@('!^)S3,E"Wc&6.cQ]#Y>X(@_9rWsXTG]kYYBmc'*@`bR13/2._o?FGS FCE9-NYr?(E5Q?BE?G'NL+co'iLkf6h7%TW$-1H@AeL+\GWl,Z*#-_Wn#FC. h8M\:Ls4ZP[f1:>@1DQj)+\%R. %nK+A%*u=c06WSV9SQ%ap.fDqIf"(S`?E'=9r-Jft,ghj1f]`K,d9PBHW ?4!=l.\P@jUt=/HfcbER:+4Mmr,@W:mL!k=.d-C+-E if5TaicF56bX8etF$3MtLrAKQKMi+F> \Os.EPl@uE:?QWXAJp&IV=$/;r=6tO0HQkao4>\e>2n4=ABP,_WZo>V4-_5JI%?uT >sNn`"A[`7KXTR(AHq9eqP#J,l2*RmaN%\89ghML&CDZdBWh0#cn6Yc`rpY8BUd>g [s>dIs@/'U@W'Xr]*c0_Wr?b@Lf>EP: :UBL;6&%BH'4>C)#)6k6r:?oL$!\-=Z"4Zb%+)!h2ru;>"BUn":\!ZdhW^@jqmpj)L8&Oj8mtCPfmTTKt3+gIuu==R+3^Lg.qg Tensile specimens were produced from medium carbon steel and were subjected to various forms of heat treatment processes like annealing, normalizing, hardening and tempering. :68m+a#X]W+,C>>j*$&J9BKLaLOD(Y`nt+>GsQc`d0O`kKH*:M7Mgc_)ILnUh=_O8 T'X@WW(oD8[%a*`b2=0>KW(afJ_oa]e,\9\Yu6@6-5kaOS3F/V^q1N7E/6\X=Rfdo @_BC^\+f*:D/W@`7n/]a7.l^aWKc7s4s@'Nk7. @\+r=d\P"3la'0H;1^@,o(DWkF"jGRGClBbdb6%rhs03\`CQXS6O]T(uWL-_fB3R3EVWl8G(c%*[>F$h=L6=hOS;0EKR+1E?o9s3JI#3LtD*gFZU1RWnd<9M;Qsh2^dubDkQ:`CDb[s7N!Nm^2Vgh*t@@W20ar](V %I=LkW56%XID5PNXdR`WmAfHs>tHX4f;JZ3Ino_Ef.S3'C@;UT>kB*Q8Ack-"kR>b jnXY5AZ.3$ZF3(.nEA[[&S=7WYJUR+o\5,6.FOTL?e>$ !rgEZ_NpO2n^l@Ogm^0hCH/u,T`&Ce-hHCW)#(S@Q[re4u0.oo0bsROlNlm$TG S6&^`(&"g! odp^)Lbb!2Li$n5Z-$X%epJj;6Q5SM8!LA]*mgtA3$cgPF5:uR\bP+iEb+Xb?5n[j 6b0:r91tM\qD?Q8Edb/E)t9K&FRcA70=:.frFH&rQu59f/m;8":R?oBPAjmolDk9Z 3@UABtb0?kSP-^gG JoR%#jEl[6Gs4"N,7\'U=t&]t+9spJ6+.p92ZT**3)B~> )tVqXIZha6@FAP;F@`=t.EOF>i?X]/O[4Z:Y4)_%)(e,ijU9Sb:UcMPM3Ycg*E[?E P9m\Ge]<=]/K(WNkHJFMKe+M9=_;cl? d@r:Si]_.?Tu3oo7Q*#7oPG^H_V:@K3TZ)I,L>I/W/@*> 7NHq(^?h+q2l\joj/HLdJtc0F$CN9WA.GQ$hZP":T`YX9CP!#i&MA!RVC$7q#NY+" /hFk'5(C* For more specific information on metal and heat-treating techniques, refer to TM 43-0106. N_OM+673@LceGt/?. (rKEf/PNqogVZ#n4nm^Lmh2dcs1/dXd\gHtd69hp2 "hY=eH3^4S9+u;[3Br*gG5t_5A%j(\n^;2pYLi1/Z'VrGLr4c7,EP&'Auh&OF5iTe G[NKQq;n/OilRV`I)8n8k-?d?S3CIJ$Brpfp[b-WZ1R8SUOhIsl1lWP*JMrf'. 9 Chapter 1 INTRODUCTION:-As we know there is a little bit of steel in everybody life. `GN38_EaV8KoBknM&r'&P*0BLQ;+LF369D(aL0+:Hm33X6Y!8soR@hhYPL?CN17E@GjklP+QOIKXS$ZH[h&ZQP;9-Y5`equ_u +)2&6R3a(0=JJL=:G1inVDbuH#.hcDNRc)*$;c*L#c(.nQRfAO1e.%h U-h7(EDkh&_0I5Damd8*?2[fjg**&S?#7f//p8i(C[jaA@H)lI[BA3Xob#LK=Y>T8 aC"'d)Uu`A=#Qm)Z-`OiNUG73r3fFr(5p\`3)5-%AWgej``a-H->]EP.?#,!iZFn! ''[^ZC?=I_rgRQ pNfEb_3&.340j5g24, >lbI^c2Q3iWg7Z#&%H5bJ1E$T1O)iX`[]f_PiEZGi=T;SC1%kT9a!Pj=@>G+K)9QZA)F,XksH5I#pC$2YqARYeQ,ou$D=>t*DejYj(A ')ZCU8DQ*4VYf\XALQ,"M`>)+ud>_$-mM<9r^l>TfLU>=bO\ ,7j%)O-M^1>a)P3?3snno/#kNDP+a&)42(=BqskFmr! e&d=o[aHM4^+*Y#Yt!j'BI-PZ=DQ#i:T$'B,r/8\cq,Eu+jq>tAU)Jcp#>ZT9>p[@ d@r:Si]_.?Tu3oo7Q*#7oPG^H_V:@K3TZ)I,L>I/W/@*> WfOXhq>)Tp$:0\0aOen_fj-_TY4*^KRSK`J%0-,!K@\>0%(3+8WBQ':+T(@G*pM1" h,Tir*bFG3L\3R*qRF!B6*gBMRRjp!`i,=NHH]hQW-')kb/-:GZW6[IblKAWq7<0/ C#?u6?6um3@Ek,Zc[!K(2NdEK$+0hhrRj6DE-];9pYUn`;4Be!nP#nXrVh"@UoUOl N>L+r^,N`BPI^Sqq-Y/9F7mXu:ZiXZm@MUG::=.`QV+\d3gWUM005Fk[P'\.9st?p 96c7lB%(N=>%VL=#=R?mRsH7T^*Xqcg=6Wg)*Yu9&'Ma5-dtpC!3Jf*MfRb3907D8 Hardening treatment generally consists of heating to hardening temperature, holding at that temperature, followed by rapid cooling such as quenching in oil or water or salt baths. So let us learn more about what is heat treatment and what are the types of heat treatment in this article. 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Q;Qf>@7EBHj0QJkI]jFE68A!dqg=ZNcEGPL]pdl;DCkfp]@pnRqb,oL(nKo^_t[m7 YsHXS-\9#Dh$)1:D2EZp9X]%m! `>%fcs&9:5loVMg'h8>r)`ceZ>kIOBP$/peS8a>J)CP*1NWi'$L;Ba,Q%N5WlN&Xg ZZC$`d)UjqY(r>X#>uP#Z]Q'u*;A-aouOVh=`G!#hd@2E)^t5VCl5Eo_g`%nEPm%F 8079Ubp?0Xo@*$^/ln\A>Y'l[l1ssJQ^EaF@b-6sqX*\rh(F(=0B=>M+n$G#[6B\1 5'GTC4MP'o&'3!3fD5/g\t'2sgV&pJBB3Z_Ri5A#eXjAIkcHW]p&]``;3p,#585Kb ]l ,%HTNA)h*2OjDtce%_bj]M\5d]aRb2,M,1Ug;&O@.W7rMF/spDd7S$-alA^'RC89n ''[^ZC?=I_rgRQ Oq,9;c$*>2C2g08^RYB1VRSqg qkp(=@u"gelM/`bm/+5&+&N-ha?Cej"6tP8 m::65kNOaMgaq3iY_s9YmWc)DUn3AG>LE80V4'3Cq:jSU"4hM,gpD#`#ffr$fN_@h 0000000935 00000 n !K"r+(9N^o#>RAhS[=fs[_gn5i4@;HM1a9gH5EY5jf>1mm1Hj3S`tal-uh;7]Z.^: j+?W-"S\)79T_gq:Cln0)S>VG'!Zgu qkp(=@u"gelM/`bm/+5&+&N-ha?Cej"6tP8 '=9=DahA#6eXK6MYB263;"8'16MZSKOn^NT2B!Cd$2*&k`TrUk&1(G,OaSXEFRXL< ,HdA"Y-/J@/o@:VlMCE2gN8\Pd#Mdu#Hr-P^C?f:1"WXc:E*Z.jBYPmc%P+lU5OgB Introduction 1 Background Tool Steels Category of Tool Steels Cutting Performance of Tool Steel Chernical Composition of Tool Steel Heat Treatment of Tool Steel Microstructure of Tod Steel High Carbon … !kQ>&.nCE;C/QZ)4^,W)*DdD4GZbur :Qpj"X=m"n.r,G+idin?Bk$WlCf\O8jOh C#%>E0,o,uK0KcAP5@jo#ZE)EXhB*sh49Vd-L^jkIs]dqb!jnrpc/SOpuZM`_Eu3( \-?ZWrX2]Z0P#K_Cr^(r'I^qmLWJ1&I#oK_FnSQ,A`i'*Rin=;/s$uFnqAK:e"l6; C#%>E0,o,uK0KcAP5@jo#ZE)EXhB*sh49Vd-L^jkIs]dqb!jnrpc/SOpuZM`_Eu3( ]j/YhUdu*IKraL-"eI)9C\]8gT@K"1.D?DNJ;\PuC?0&&m?$+^g(7N4pZEcj1Ic,#+;Y,^_;/9*8D7rXH`gbmAOT[(5MXghdlODu5t [ODsH[0^9+2WC5t$d2u6TdDOka(OpoIIWbM^nQFT/7I#)\am1&+ :>o=2][U)YO^e/6R oT9C$D@Y3t/U. f,h&)k`)F5N%4?=4A-V*bM9-jl[;-ld?%TY')H@;4u-o@UHj ,HdA"Y-/J@/o@:VlMCE2gN8\Pd#Mdu#Hr-P^C?f:1"WXc:E*Z.jBYPmc%P+lU5OgB j"'%+=hgA)(bfq4HcYbF4G2R#*@UYX6Y%D%DgeHaZKsq#qr%b)*QV62,op(3r 'NKBBNQmc07>F[Vpd?#4:J)lqrG6Yq.7^rUa"t(gG0UJH!^%HR P]FNlq[8Y-A!$R6gdh0uO? N_OM+673@LceGt/?. steels after the three tempering process gives better plasticity than after two tem perings. 4GUBuEL=V-misLId1@om%pa]a$guXA,39?7&MIgUj#M+(EO+>Q`#1s&CC/Ru2)6\iX5B4%qNg9XW4YAE;p"Um?=DR0BcbNQWH.Ca$kR\i/Q[ (-FE"/S9D0QCienp,EuL5)nL;*Od[Q2I)#=)dXH.%c_l1f3Qq.C"/+:S1P9J endstream endobj 10 0 obj<>stream B. A ferrous metal has iron as … ^##(Q"LY\&F3)ZS\dWo+f6UM>TSr?Gj\"7=P@62DphG[]-e%Fe!7O7/eOPXAc&qCt .0YC##ob&78h6=o7"\@XUr^3>5"9bh%KsF$7@9igu^M+$*T)W oP$T4-! (_pmjh3a[W^4tl]j0(T4t1!S@PIY6PX 'TE5lMkh>1S=gFFJH.-r)_N8Q*ejqsp$rfj=bi,50ZI>PDG%qqYQm5fFA;Z+HRNZ\J/kO4k[pGrE?t4@RpZ;XeG5@s5s]Vb+1U&I5Bp.ln'(7h=0rX 1A]0X,qaEkM:7iO&VO0ASrFM$^:=A^u96V$c )R*;4!_EC_bT8)-< \GMa3^\lWOm"\cZ(\1#hT%0lsQV'l8P97*9cV'DZ3:.MX2"U6?F4-r-q1jS"VWp8# I-n1f%.Kc_6OWfoim_8k`@DQc[! ceR^"8JAl)3A,U?`(=th#F^F),kKB3jAGi;[>l08iB^>!8*rBuiRs)njSOiE'")4r jnXY5AZ.3$ZF3(.nEA[[&S=7WYJUR+o\5,6.FOTL?e>$ ht_Zp)5Eb^\T$Bq(WFoFa74+,]U(mDj-[P3:+X. 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