Cov ntaub ntawv technical
NM400 Chemical Component
| Element |
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
B |
CEV |
| Qib |
NM 400 |
≤ 0.25 |
≤ 0.70 |
≤1.60 |
≤ 0.025 |
≤ 0.010 |
≤1.4 |
≤0.50 |
≤ 1.00 |
≤ 0.004 |
|
NM400 Mechanical Properties
| Qib Steel |
Y.S (MPa) |
T.S (MPa) |
Elongation A5 (%) |
Impact Test |
Hardness |
| min |
min |
min |
(°C) |
AKV J (min) |
HBW |
| NM 360 |
800 |
1000 |
10 |
-20 |
30 |
320-400 |
| NM 400 |
1000 |
1250 |
10 |
-20 |
30 |
360-440 |
| NM450 |
1250 |
1500 |
10 |
-20 |
30 |
410-490 |
| NM 500 |
1300 |
1700 |
10 |
-20 |
30 |
450-540 |
Cov nqi ntsuas ntawm steel phaj tensile zog Rp0.2, Rm thiab A50 yog muab.
Qhov ntsuas qhov tseem ceeb (AKV) ntawm qhov ntev ntawm cov hlau phaj ntawm 0 ° C thiab -20 ° C yog muab.
Hardness muab faib ua: Rockwell hardness, Brinell hardness, Vickers hardness, Richwell hardness, Shore hardness, Barinell hardness, Nooul hardness, Weinwell hardness. Vickers hardness yog qhia los ntawm HV, Rockwell hardness yuav muab faib ua HRA, HRB, HRC, HRD, Brinell hardness yog qhia los ntawm Hb [N(KGF /mm2)] (HBSHBW) (saib GB/T231-1984 ). Nws tsis yog ib qho yooj yim lub tswv yim los ntsuas qhov hardness ntawm steel qhov chaw tom qab annealing, normalizing thiab tempering los ntawm Brinell hardness txoj kev nyob rau hauv ntau lawm.
Nws yog ib qho kev ntsuas ntawm txhua yam khoom xws li elasticity, plasticity, lub zog thiab toughness ntawm cov ntaub ntawv. Kev ntsuas hardness raws li cov kev sim sib txawv tuaj yeem muab faib ua txoj hauv kev zoo li qub (xws li Brinell hardness, Rockwell hardness, Vickers hardness, thiab lwm yam), khawb txoj kev (xws li Mohr hardness), bounce method (xws li Shore hardness) thiab micro hardness, kub hardness thiab lwm txoj kev.
NM400 Sampling Test
| Kev txiav txim |
|
Qauv nab npawb |
Txoj Kev Sampling |
Txoj Kev Xeem |
| 1 |
stretch |
1 |
GB/T2975-82 |
GB228/T-2002 |
| 2 |
poob siab
|
3 |
GB/T2975-82 |
GB/T229-1994 |
| 3 |
Hardness |
1 |
GB/T2975-82 |
GB231-84 |
Hardness test: zeb tawm 1.0-2.5mm ntawm qhov chaw ntawm cov hlau phaj, thiab tom qab ntawd ua cov hardness kuaj ntawm qhov chaw. Nws yog feem ntau pom zoo kom koj mills tawm 2.0mm rau hardness test.
NM400 kev ua haujlwm
- steel phaj txiav txoj kev yog tsim rau txias txiav thiab kub txiav.Cold cutting muaj xws li dej dav hlau txiav, txiav, sawing los yog abrasive txiav; Thermal txiav muaj xws li cov pa roj nplaim txiav (tom qab no hu ua " nplaim taws"), plasma txiav thiab laser txiav. .
- txoj kev txiav: los ntawm cov txheej txheem cuam tshuam, paub cov yam ntxwv dav dav ntawm ntau txoj kev txiav steel phaj thiab txiav thickness ntau yam.
- cov nplaim txiav txoj kev ntawm qib siab hnav-resistant steel thiab zoo tib yam uas tsis muaj cov pa roj carbon thiab tsawg alloy steel txiav raws li yooj yim, nyob rau hauv lub txiav coj-resistant steel phaj, yuav tsum tau them sai sai rau !! Nrog rau qhov nce ntawm thickness thiab hardness ntawm cov hlau. Phaj, qhov tawg nyiam ntawm kev txiav ntug nce.In thiaj li tiv thaiv cov tiam ntawm cov kab nrib pleb hauv cov hlau phaj, cov lus qhia hauv qab no yuav tsum tau ua raws li thaum txiav:
Txiav tawg: steel phaj txiav tawg zoo ib yam li hydrogen induced tawg thaum vuam. Yog hais tias steel phaj txiav tawg tshwm sim, nws yuav tshwm sim nyob rau hauv 48 teev mus rau ob peb lub lis piam tom qab txiav.Yog li ntawd, lub txiav tawg yog nyob rau hauv lub sij hawm tawg, lub thickness thiab hardness ntawm cov hlau phaj yog ntau dua, qhov ntau dua qhov txiav tawg.
Preheat txiav: txoj kev zoo tshaj plaws los tiv thaiv steel phaj txiav tawg yog preheat ua ntej txiav.Ua ntej nplaim txiav, steel phaj feem ntau yog preheated, thiab nws preheating kub feem ntau yog nyob ntawm qib zoo thiab thickness ntawm steel phaj, raws li qhia nyob rau hauv Table 2.Preheating txoj kev tuaj yeem yog phom phom, hluav taws xob cua sov pad rau cua sov, kuj tuaj yeem siv lub tshuab cua sov cua sov.In thiaj li txiav txim siab cov nyhuv preheating ntawm steel phaj, qhov ntsuas kub yuav tsum tau kuaj ntawm qhov chaw kub ntxiv.
Nco tseg: preheating tshwj xeeb mloog, ua kom lub phaj interface uniformly rhuab, thiaj li tsis mus cuag lub tshav kub qhov chaw ntawm lub zos overheating tshwm sim.
Tsawg ceev txiav: Lwm txoj hauv kev kom tsis txhob txiav cov kab nrib pleb yog txhawm rau txo qhov nrawm.Yog tias koj tsis tuaj yeem preheat tag nrho cov phaj, koj tuaj yeem siv cov txheej txheem preheating hauv zos xwb.Siv txoj kev txiav qis qis kom tsis txhob txiav tawg, nws txoj kev ntseeg siab tsis zoo li. preheating.Peb xav kom preheating lub txiav txoj siv nrog nplaim taws cavitation ob peb zaug ua ntej txiav, thiab lub preheating kub yog tsim nyog mus txog 100 ° C.Qhov siab tshaj plaws txiav ceev nyob ntawm seb steel phaj qib thiab thickness.
Cov lus ceeb toom tshwj xeeb: kev sib xyaw ua ke ntawm preheating thiab qis ceev nplaim taws txiav txoj kev tuaj yeem txo qhov tshwm sim tshwm sim ntawm kev txiav cov kab nrib pleb.
Kev ua kom txias qeeb tom qab txiav: seb qhov txiav tsis yog preheated los yog tsis, qeeb txias ntawm steel phaj tom qab txiav yuav zoo txo qhov kev pheej hmoo ntawm kev tawg tawg.Yog hais tias nws yog stacked nrog sov thiab qhuav tom qab txiav, nws yuav tsum tau them nrog tshav kub rwb thaiv tsev. daim pam, thiab qeeb txias tuaj yeem pom tau. Kev ua kom txias qeeb yuav tsum ua kom txias rau chav tsev kub.
Cov cua kub yuav tsum tau ua tom qab txiav: rau kev txiav cov hlau-resistant steel phaj, cua sov (tsis tshua muaj kub tempering) yog coj tam sim ntawd tom qab txiav, uas kuj yog ib tug zoo txoj kev thiab kev ntsuas los tiv thaiv tej kab nrib pleb. Txiav thickness ntawm steel phaj los ntawm tsawg kub tempering kev kho mob , tuaj yeem tshem tawm qhov kev ntxhov siab (tsawg kub tempering txheej txheem; Moisturizing lub sij hawm: 5min / mm)
Rau cov txheej txheem ntawm cua sov tom qab txiav, rab phom kub, hluav taws xob cua sov daim pam thiab mourning rauv kuj siv rau cua sov tom qab txiav.
Cov khoom tiv thaiv softening ntawm cov hlau tsuas yog nyob ntawm nws cov tshuaj muaj pes tsawg leeg, microstructure thiab kev ua cov txheej txheem.Rau thermally txiav qhov chaw, qhov me me, qhov ntau dua qhov kev pheej hmoo ntawm softening tag nrho ib feem.Yog hais tias qhov kub ntawm cov hlau phaj siab tshaj 200-250. ° C, lub hardness ntawm steel phaj yuav txo.
Txoj kev txiav: thaum cov hlau phaj txiav me me, cov cua sov muab los ntawm vuam teeb thiab preheating yuav sib sau ua ke nyob rau hauv lub workpiece.Qhov me me txiav, qhov loj ntawm cov txiav workpiece yuav tsum tsis pub tsawg tshaj 200 hli, txwv tsis pub lub workpiece yuav muaj kev pheej hmoo ntawm softening.Qhov zoo tshaj plaws los tshem tawm qhov kev pheej hmoo ntawm softening yog txias txiav, xws li dej dav hlau txiav.Yog tias thermal txiav yuav tsum tau siv, plasma lossis laser txiav yog ib qho kev xaiv txwv.Qhov no yog vim cov nplaim txiav muab cov cua sov ntau rau. lub workpiece, yog li nce qhov kub ntawm lub workpiece.
Txoj kev txiav hauv qab dej: ib txoj hauv kev zoo los txwv thiab txo qhov thaj tsam ntawm thaj tsam softening, siv dej rau lenga steel phaj thiab txiav nto thaum lub sij hawm txiav.Yog li ntawd, cov phaj hlau tuaj yeem txiav hauv dej, lossis nws tuaj yeem txiav. los ntawm kev txau dej rau qhov chaw txiav.Plasma lossis nplaim taws txiav yog xaiv tau rau kev txiav hauv qab dej.Underwater txiav muaj cov yam ntxwv hauv qab no:
- Me me tshav kub cuam tshuam cheeb tsam ntawm kev txiav;
- Tiv thaiv lub hardness ntawm tag nrho cov workpiece los ntawm kev txo qis;
- Txo qhov deformation ntawm txiav workpiece;
- Lub workpiece tuaj yeem txias ncaj qha tom qab txiav.
Qeb Sib piv Table
Cov lus sib piv ntawm NM400 hnav-tiv thaiv steel phaj thiab cov hlau tuaj txawv teb chaws
| WYJ/WJ |
JFE |
SSAB |
DILLIDUR |
SUMIHARD |
| NWS 400 |
JFE-EH400 |
HARDOX 400 |
400 V |
k400 ua |
NM400 hnav-tiv taus steel phaj domestic hom kev sib piv lub rooj
| WYJ/WJ |
WISCO |
HARD |
Q/XGJ |
jx 62 |
| NWS 400 |
NM 400 |
HARDOX 400 |
NM 400 |
NM 400 |
Daim ntawv thov Prospect
Ntau tshaj 5000 tons ntawm NM400 steel daim hlau yog siv rau excavator, loader, bulldozer thoob phaj, hniav phaj, sab hniav phaj, hniav phaj, crusher liner phaj thiab hniav siv tej yaam num nyob rau hauv engineering machinery, mining machinery, thee mining machinery, ib puag ncig tiv thaiv machinery , metallurgical machinery thiab lwm yam kev lag luam.
