HEAT TREATMENT & MATERIAL TESTING DEPARTMENT


ADVANCED TRAINING INSTITUTE (ATI) – Xu; ghu;it
        fhyk; kw;Wk; gUt khw;wk; fhuzkhf ,d;W cyfpy; gy gFjpfspYk;
kiof;fhyq;fspy; ntapYk; ntapy; fhyq;fspy; kioAk; nga;tjhy; kf;fs;
nra;tjwpahky; jpiff;fpd;wdu;. ,jpy; kioiatpl ntapypdhy; gyu;
fbdg;gLfpd;wdu;. Mf> ,d;W cyfj;jpy; midj;J ,lq;fspYk; ntg;gk; vd;gJ
,d;wpaikahdjhfptpLfpwJ. ek; nrd;idapy; gy ngUikfis rj;jkpd;wp nra;J
tUk; xU epWtdj;ij ehk; fle;j rpy khjq;fsha; ghu;j;JtUfpNwhk;. Xt;nthU
JiwAk; kw;w JiwfspypUe;J NtWgl;Lk; jdpj;Jk; fhzg;gLtNj ,e;epWtdj;jpd;
rpwg;G. ,f;fl;Liuapy; ehk; fhztpUf;Fk; Jiw HEAT TREATMENT & MATERIAL TESTING.
        ,g;gpuptpy; ,Jtiu tUlj;jpw;F Rkhu; 200 egu;fs; ,j;Jiwapy; gapw;rp
ngw;W rpwg;Gld; tpsq;Ffpd;wdu;. jw;NghJ Rkhu; 15 khztu;fs; gapw;rpia
Nkw;nfhs;fpd;wdu; vd;gJ $Ljy; jftyhf ,Ug;gJ ngUkpjk;. ehk; ek; khu;r;
khj ,jopy;(g.vz; 34) Fwpg;gpl;lgb gy epWtdq;fspd; ty;Yeu;fSk; ,q;Nf
te;J gapw;rpg; ngw;W nrd;Ws;sdu;. tFg;giwfSk; Nkw;$wpa gf;fj;jpy;
njspthfTk; tpsf;fkhfTk; $wpAs;sij ,j;jUzj;jpy; epidT$u;tjpy; ngUkpjk; nfhs;fpNwd;. ,j;Jiwf;Fk; cjtp,af;Feuhf jpU.Atuh[; mtu;fNs nray;gLtJ ,j;Jiwf;F $Ljy; ngUik.
    ntg;g rpfpr;ir mbg;gilapyhd cNyhftpay; Nfhl;ghL(Basic metallurgical theory of heat Treatment) :
 ntg;g rpfpr;ir Kiwapy; Kjyhtjhf cNyhfj;jpd; jd;ikiag; nghUj;J gad;gLj;jg;gLfpwJ. jd;ikiag; nghUj;J cNyhfj;ij fha;j;J Fspuitj;jy; (Annealing),cNyhfj;ij ,ay;ghf;Fjy; (Normalising)> cNyhfj;ij fbdg;gLj;Jjy; (Hardening), ntg;gepiy khw;wk; (Tempering) nra;jy; Nghd;w Kiwfis nra;fpd;wdu;. NkYk;> ,q;Nf ntg;gk; jzpg;gjw;fhd jj;Jtq;fSk; KiwfSk; (Quenching principles and practice) filg;gpbf;fg;gl;Lk; nray;gLj;jg;gl;Lk; tUfpwhu;fs;. NkYk;> cNyhfj;jpd; Nkw;gug;ig fbdg;gLj;Jjy; Nfhl;ghLk; KiwfSk; (Surface hardening theory and practice) gpd;gw;Wfpd;wdu;. ciyfspd; tiffs;> nghUl;fs; kw;Wk; #Nlw;wy; Kiwfs; (Furnace types, materials and heating methods), ntg;g mstPLjy; kw;Wk; fl;Lg;gLj;jy; Kiwfs; (Temperature measurement and control), cg;G-Fspay; Kiw (Salt-bath heat treatment), ntg;g rpfpr;iria #o;epiyiag; nghUj;J fl;Lg;gLj;Jk; Kiw (Controlled-atmosphere heat treatment) Nghd;w KiwfNshL ntg;g rpfpr;ir Kiwapy; cj;jputhjKk; juf;fl;Lg;ghLk; (Quality control/assurance in heat treatment) gw;wpa tpupthd tpsf;fKk; ,q;F gbf;Fk; khztu;fSf;F fw;Wj;jUfpd;wdu;. ,jdhy; ,q;Nf gapw;rp ngw;W nry;Yk; midtUk; rpwg;ghd Kiwapy; jhq;fs; gzpGupAk; epWtdq;fspy; ,q;Nf ngw;w gapw;rpapd; %ykhf rpwe;J tpsq;Ffpd;wdu; vd;gJ $Ljy; jftyhf ,q;Nf gjpT nra;a tpUk;GfpNwd;.
kg;G+y; ciy (MUFFLE FURNACE )
    ,e;j ciyapd; Kd;ntg;gk;> fha;j;J Fspuitj;jy;> fbdg;gLj;Jjy; kw;Wk; ,ay;ghf;Fjy; Nghd;wtw;iw nra;aKbAk;.  NkYk;> ,e;j ciyapd; %yk; rpwg;ghd Kiwapy; cNyhfq;fis rupghu;f;fTk; Jy;ypakhd tpilAk; fpilg;gJKNk ,jd; gadhFk;. ,e;j ciyapd; kjpg;G Rkhu; &.1 yl;rk; MFk;.
,uz;L mLf;F ciy (DOUBLE CHAMBER FURNACE)
,e;j ciy 13700c ntg;gj;ij fbdg;gLj;Jjy; Kiwf;Fk; 10250c ntg;gj;ij xtd; %ykhf ntg;gepiy khw;wk; GupAk;. NkYk; ,e;j ciyapd; %ykhf mjpf jpwd; nfhz;l ];By; cNyhfq;fSf;Fk; ntg;gepiy khw;w Row;rpf;Fk; nghUe;Jk;gbahf cs;sJ. ,e;j ciyapd; kjpg;G Rkhu; &.2 yl;rk; MFk;.
cg;G Fspay; ciy %yk; ntg;g rpfpr;ir Kiwapy; vy;yh tpjkhd cNyhfq;fisAk; fbdg;gLj;Jjy; kw;Wk; cNyhfj;ij jzpj;jy;> Fspuitj;jy;> fupahf;fy; (Carburizing) Nghd;wdtw;iw nra;fpwJ. ,e;j ciyapd; nfhs;ssT 2 nkfhthl; Mk;gpau; (2 MVA) MFk;. NkYk;> ,e;j ciy mjpfj;jpwd; nfhz;lJ. ,jd; %yk; gytpjkhd cs;sPLfis nrYj;jp gy ed;ikfisg; ngwyhk;. #o;epiy> jputk; kw;Wk; vyf;l;NuhLfspd; cg;G Fspay; ciyfs; %yk; ve;jnthU cNyhfj;ijAk;(ve;j tbtkhdhYk;) Fwpg;ghf ALLOY STEEL, HSS, DIE STEEL Nghd;wdtw;iw rpwg;ghd Kiwapy; fbdg;gLj;jyhk;. ,e;j ciyfs; msTkhw;wk; (Scaling), fsj;jpy; ,wq;Fjy; (Pitting) Nghd;wtdw;wpypUe;J ghJfhj;J nfhs;fpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.3 yl;rk; MFk;.
Jhz;ly; fbdg;gLj;Jjy; (INDUCTION HARDENING)
  ,e;j ,ae;jpuj;jpd; %yk; ntg;gj;ij cau;j;j cNyhfj;jpd; jd;ikf;Nfw;g fbdg;gLj;j KbAk;. NkYk;> fbdg;gLj;jg;gl;l gFjp kl;LNk ntg;gkhf;fg;gLfpwJ. NkYk; fpau;fs; (Gears), khw;wpj;jz;L (Crankshafts),nek;GUs; jz;L (Camshafts),jz;L xl;lk; (Driveshafts),ntspaPL jz;L (Outputshafts),KWf;Fgl;il (Torsion bars), jhyhl;L if (Rocker arms) Nghd;wdtw;iw fbdg;gLj;j ,e;j ,ae;jpuk; cjTfpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.1 yl;rk; MFk;.
fupahf;fy; (Carburizing)
 ,J xU fbdg;gLj;Jjy; Kiwfspy; xd;whFk;. ,jd; %yk; fhu;gd; Fiwthf ,Uf;Fk; cNyhfq;fspy; fhu;gd; msit mjpfupj;J mjw;F jFe;jhw;Nghy; Nkw;gug;gpy; guttpl;L ];Biy nfl;bahf;fp gpd; ntg;gepiy khw;wk; kw;Wk; jzpj;jy; Kiwfspd; %yk; cNyhfq;fs; fupahf;fy; nra;ag;gLfpd;wJ. fupahf;fy; nghJthf 9250c ntg;gj;jpy; gad;gLj;jg;gLfpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.5 yl;rk; MFk;.
ciyfspy; gjkhf;F Kiw (TEMPERING FURNACE)
  fhw;Nwhl;lKs;s gjkhf;F KiwahdJ ntg;gk; nrYj;Jjy;> cjpupg;ghfq;fs;> RUs;fk;gpfs; Nghd;wtw;wpy; gad;gLfpwJ. NkYk;> 7500c ntg;gj;jpy; nray;gLk; Kiwapy; mikf;fg;gl;Ls;sJ.
 ,e;j ciyapd; kjpg;G Rkhu; &.2 yl;rk; MFk;.
gpupePy;/tpf;fu;]; jpd;ik mstp (BRINEEL/VICKERS HARDNESS TESTER)
 lhf;lu; n[.V.gpupePy; vd;gtu; 1900k; Mz;L RtPld; efupy; gpupePy; Nrhjidia fz;Lgpbj;jhu;. kpfTk; goikahd fbdr;Nrhjid ,JthFk;. ek; ehl;by; ,t;tifahd gpupePy; Nrhjidapy; 5 my;yJ 10 kp.kP fhu;igL ge;Jfspy; 500 Kjy; 3000 fpNyh vilAld; nra;ag;gLfpd;wJ.
tpf;fu;]; Nrhjid 1925k; Mz;L ,q;fpyhe;jpy; cUthf;fg;gl;ljhFk;. ,jw;F itu gpukpL fbd Nrhjid (DIAMOND PYRAMID HARDNESS TEST(DPH))vd;Wk; $Wtu;. tpf;fu;]; Nrhjidapy; 2 tifahd tpir msTfs; cs;sd. mit ikf;Nuh (10 fpuhk; Kjy; 1000 fpuhk; tiu) kw;Wk; Nkf;Nuh (1 fpNyh Kjy; 100 fpNyh tiu) Nrhjid nra;a gad;gLfpwJ.
];lhd;yp uhf;nty; vd;gtu; uhf;nty; fbd Nrhjidia fz;Lgpbj;jhu;. ,tu; fz;Lgpbj;j Nrhjidapd; gad; ,d;W fbdNrhjidapy; cyfk; KOikf;Fk; ngUk; Kd;Ndw;wkhf mike;jpUf;fpd;wJ. ve;j xU cjpupghfj;ijAk; fbdNrhjidia gad;gLj;jp cNyhfj;jpd; fbdj;ij Jy;ypakhfTk; tpiuthfTk; fzf;fpl cjTfpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.2 yl;rk; MFk;.
UTM
,e;j ,ae;jpu %ykhf ,Oj;J tpiug;ghf;ff;$ba (Tensile) jpwidAk;> ,Uk;G (Ferrous) kw;Wk; ,Uk;gw;w cNyhfq;fspd; ePl;rp (Elongation) Mfpait fz;Lgpbf;f cjTfpwJ. ,jd; nfhs;ssT 1000 fpNyh epA+l;ld; MFk;.
,e;j ciyapd; kjpg;G Rkhu; &.6 yl;rk; MFk;.
vupf;rd; fg;gpq; Nrhjid ,ae;jpuk; (ERICSON CUPPING TESTING MACHINE)
 ,e;j ,ae;jpuk; nkl;ly; jfLfs; kw;Wk; ,iofs; Kjypaditfspd; fg;gpq; jpwid Nrhjid nra;Ak; Kiwapy; tbtikf;fg;gl;Ls;sJ. NkYk; cNyhfq;fs; xl;bf;nfhs;Sjy; (Adhesion), nefpo;r;rp (Elasticity) kw;Wk; ngapz;Lfspd; jd;ikia kw;wtw;NwhL xg;gpl;L nfhs;s ,e;j ,ae;jpuk; gad;gLfpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.1 yl;rk; MFk;.
rhak; $u;e;j Ma;T Kiw (DYE PENETRATE INSPECTION (DPI))
 ,e;j Ma;T Kiwia jput $u;e;j Ma;T Kiw (LIQUID PENETRATE INSPECTION (LPI) OR PENETRATE TESTING (PI)) vd;Wk; $wyhk;. ,J Jthuq;fsw;w nghUl;fspd;(nkl;ly;> gpsh];bf; my;yJ nruhkpf;];) gug;gpd; Nky; cs;s Fiwfis fz;lwpa cjTfpwJ. jput $u;e;j Ma;T Kiw %yk; gw;w itg;G Kiw kw;Wk; tbg;G Kiw %ykhf gug;gpy; cs;s kapupioahd tpupry; (Hairline cracks), Nrhu;T tpupry; (Fatigue cracks), GJ nghUl;fspy; cs;s tpupry;fis fz;Lgpbf;f cjTfpwJ.
,e;j ciyapd; kjpg;G Rkhu; &.1 yl;rk; MFk;.
fhe;j Jfs; Ma;T (MAGNETIC PARTICLE INSPECTION (MPI))
 ,ij mopT my;yhj Nrhjid vd;Wk; $wyhk;. ,jd; %yk; ,Uk;G nghUl;fspd; kPJk; cNyhfq;fs; kw;Wk; fhe;jGyd;fs; kPJk; Vw;gLk; tpupry;fis fz;lwpa cjTfpwJ. ,e;j ciyapd; kjpg;G Rkhu; &.1.5 yl;rk; MFk;.
Nfshxyp gupNrhjid (ULTRASONIC TESTING (UT))
 Fiwe;j xyptiyfis (0.1 Kjy; 15) nkfh n`l;]; nfhz;ljhf cs;sJ. vg;NghjhtJ 50 nkfh n`l;]; tiu gad;gLj;jp cNyhfj;jpd; fdj;ij fz;Lgpbf;fyhk;.
,e;j ciyapd; kjpg;G Rkhu; &.6 yl;rk; MFk;.



Note: 2012 status

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