Nplaim txiav txoj kev rau qib siab hnav-resistant steel daim hlau

Qhov no yog qhov yooj yim li kev txiav cov pa roj carbon tsawg thiab cov hlau tsis tshua muaj hlau. Thaum txiav hnav-resistant steel daim hlau thiab tuab daim hlau, yuav tsum tau them nyiaj !!! Raws li lub thickness thiab hardness ntawm steel phaj nce, lub siab nyiam rau cov kab nrib pleb tshwm nyob rau hauv lub txiav ntug nce. Txhawm rau tiv thaiv kev tsim ntawm steel phaj txiav cov kab nrib pleb, cov lus qhia hauv qab no yuav tsum tau ua raws thaum txiav:
Txiav cov kab nrib pleb: steel phaj txiav cov kab nrib pleb zoo ib yam li hydrogen induced cracks generated thaum vuam. Yog tias cov kab nrib pleb tshwm sim thaum lub phaj steel txiav, lawv tsuas yog tshwm sim hauv 48 teev mus rau ob peb lub lis piam ntawm kev txiav tuab. Yog li ntawd, kev txiav cov kab nrib pleb yog cov kab nrib pleb qeeb, thiab ntau dua qhov thickness thiab hardness ntawm cov phaj steel, qhov tshwm sim ntau dua ntawm cov kab nrib pleb.
Preheating txiav: Txoj kev ua tau zoo tshaj plaws los tiv thaiv cov phaj hlau txiav yog preheat ua ntej txiav. Ua ntej nplaim taws txiav, steel phaj feem ntau yuav tsum tau preheated, thiab qhov kub ntawm preheating feem ntau yog nyob ntawm qib zoo thiab thickness ntawm steel phaj, raws li qhia nyob rau hauv Table 2. Cov txheej txheem preheating tuaj yeem nqa tawm los ntawm kev siv cov nplaim hluav taws xob, hluav taws xob. cua sov ncoo, los yog lub qhov cub cua sov. Txhawm rau txiav txim siab cov nyhuv preheating ntawm steel phaj, qhov ntsuas kub yuav tsum tau kuaj ntawm qhov chaw kub.
Kev saib xyuas tshwj xeeb yuav tsum tau them rau preheating kom ntseeg tau tias qhov sib cuam tshuam ntawm ob daim hlau hlau yog sib npaug sib npaug kom tsis txhob muaj cua sov hauv cheeb tsam hauv kev sib cuag nrog cov cua sov.
Tsawg ceev txiav: Lwm txoj hauv kev kom tsis txhob txiav cov kab nrib pleb yog txo cov txiav ceev. Yog tias tag nrho nplooj ntawv preheating tsis tuaj yeem ua tau, txoj hauv kev preheating hauv zos tuaj yeem siv los hloov. Kev siv cov kev txiav qis qis los tiv thaiv kev txiav cov kab nrib pleb yog tsis muaj kev ntseeg siab li preheating. Peb xav kom siv cov nplaim taws ua ntej ua kom sov cov hlua txiav ob peb zaug ua ntej txiav, nrog rau qhov kub thiab txias ntawm ib ncig ntawm 100 ° C. Qhov siab tshaj plaws txiav ceev yog nyob ntawm qib thiab thickness ntawm cov phaj steel.
Cov lus ceeb toom tshwj xeeb: Kev sib xyaw ua ntej cua sov thiab cov nplaim hluav taws kub ceev tuaj yeem txo qhov tshwm sim ntawm kev txiav cov kab nrib pleb.
Yuav tsum tau ua kom txias txias tom qab txiav: Txawm hais tias preheating lossis tsis yog qhov tsim nyog rau kev txiav, qhov txias txias tom qab txiav steel phaj yuav ua rau kom muaj kev pheej hmoo ntawm kev txiav cov kab nrib pleb. Yog tias nws sov so thiab tsis pom tom qab txiav, npog nws nrog ib daim pam rwb thaiv tsev kuj tuaj yeem ua kom txias txias, uas yuav tsum tau txias rau chav tsev kub.
Cov cua kub uas yuav tsum tau ua tom qab txiav: Rau kev txiav cov hlau-resistant steel daim hlau, cov cua sov tam sim ntawd (temperature tempering) kuj yog ib txoj hauv kev zoo thiab kev ntsuas los tiv thaiv kev tawg. Hlau phaj txiav thickness tuaj yeem tshem tawm kev ntxhov siab los ntawm kev kho qhov kub thiab txias (tsawg-temperature tempering txheej txheem; lub sij hawm rwb thaiv tsev: 5min / mm)
Rau cov txheej txheem ntawm cua sov tom qab txiav, rab phom combustion, hluav taws xob cua sov pam vov, thiab lub qhov cub moj tej tawg kuj siv rau cua sov tom qab txiav.