Dab tsi yog NM400 hnav-cov phaj hlau tiv taus?
NM400 yog lub siab -lub zog hnav- cov phaj hlau tiv taus nyob rau hauv Suav teb tus qauv txheej txheem, thiab yog ib qho ntawm cov qib tseem ceeb ntawm NM series ntawm hnav- cov hlau tsis muaj zog. Nws qib naming ua raws li txoj cai meej thiab muaj tseeb: "NM" yog thawj tsab ntawv ntawm Suav pinyin rau "hnav-resistant" (Nai Mo), thiab "400" qhia qhov nominal Brinell hardness tus nqi ntawm 400 HBW.
NM400 yog ib qho ntawm cov qhab nia hauv GB/T 24186-2022 "High-strength Wear-resistant Steel Phaj rau Engineering Machinery". Cov qauv no suav nrog xya qib hardness ntawm NM300 txog NM600, nrog rau qhov nyuaj ntawm 270–640 HBW. NM400 yog qhov siv dav tshaj plaws ntawm txhua qib NM series, suav txog ntau dua 50% ntawm kev noj. Nws ua tiav qhov kev sib npaug zoo ntawm kev hnav tsis kam, cuam tshuam toughness, weldability, thiab tus nqi, ua rau nws nyiam cov khoom siv rau nruab nrab mus rau hnyav hnav hauv mining, engineering tsim, thiab tuav cov khoom.
Tiv tauj peb tam sim no rau ib nqe lus
Kev ua raws li cov qauv thiab cov txheej txheem
NM400 hnav-cov hlau tsis muaj zog yog tsim raws li GB/T 24186-2022 (hloov lub 2009 version), tus qauv lub npe uas yog "High-lub zog Wear-resistant Steel Phaj rau Engineering Machinery". Cov txheej txheem no qhia tag nrho cov kev xav tau, suav nrog tshuaj lom neeg muaj pes tsawg leeg, cov khoom siv kho tshuab, qhov ntev ntev, qhov zoo ntawm qhov chaw, thiab cov txheej txheem tshuaj xyuas.
Tshuaj muaj pes tsawg leeg thiab mechanical zog
1. Cov khoom siv tshuaj
Qhov kev ua tau zoo tshaj ntawm NM400 stems los ntawm nws ua tib zoo sib npaug tshuaj muaj pes tsawg leeg. Cov lus hauv qab no qhia txog qhov muaj pes tsawg leeg thiab lub luag haujlwm tshwj xeeb ntawm txhua qhov alloying:
| Element | Cov ntsiab lus ntau (wt%) | Lub luag hauj lwm thiab Mechanism |
|---|---|---|
| Cov pa roj carbon (C) | 0.20–0.30 | Cov ntsiab lus ntxiv dag zog; cov ntaub ntawv siab -hardness carbides uas ncaj qha ua rau hnav tsis kam; txhawb kev tsim martensite thaum quenching. |
| Silicon (Si) | 0.10–0.50 | Deoxidation tus neeg sawv cev; muab cov khoom ua tau zoo- daws qhov muaj zog thiab txhim kho oxidation tsis kam. |
| Manganese (Mn) | 1.00–1.60 | Txhim kho hardenability kom paub meej kev hloov pauv thoob plaws hauv cov ntu tuab; inhibits kub tawg thaum lub sij hawm thermal ua. |
| Chromium (Cr) | 0.30–1.20 | Kev hnav tseem ceeb-cov khoom tiv thaiv; cov ntaub ntawv (Cr, Fe)₇C₃ nyuaj theem uas zoo heev txhim kho puas ntsoog; kuj txhim kho hardenability thiab tempering stability. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.025 | Tswj nruj me ntsis impurity; tuaj yeem ua rau txias brittleness thiab degrade weldability yog tias ntau dhau |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.025 | Tswj kom muaj zog thiab kub ua haujlwm; tsim cov nonmetallic inclusions uas tuaj yeem ua rau anisotropy. |
| Boron (B) | 0.0005-0.005 (txoj kev) | Dramatically txhim kho hardenability txawm nyob rau hauv ntau me me; xyuas kom tob hardening nyob rau hauv daim hlau thicker. |
2.Mechanical zog
NM400 muab kev pom zoo ua ke ntawm hardness, lub zog, thiab toughness, ua tib zoo sib npaug kom haum rau ntau yam hnyav- hnav daim ntaub ntawv. Cov lus hauv qab no qhia txog cov cuab yeej cuab tam ib txwm muaj rau NM400 nyob rau hauv qhov mob quenched thiab tempered:
| Khoom | Tus nqi | Lus hais |
|---|---|---|
| Brinell Hardness (HBW) | 370–440 (ib txwm 380–440) | Sib npaug rau HRC 38–46 ntawm Rockwell C nplai; qhov tseeb txawv nrog phaj thickness. |
| Tensile zog (Rm) | Ntau tshaj los yog sib npaug ntawm 1200-1250 MPa | Tshaj dhau cov qauv txheej txheem xws li Q345或Q460. |
| Yield zog (Rel) | Ntau tshaj los yog sib npaug rau 1000-1050 MPa | Siab tsis kam rau yas deformation nyob rau hauv hnyav loads. |
| Elongation (A₅) | Ntau dua lossis sib npaug li 10% | Txaus ductility kom nqus tau qhov cuam tshuam thiab kev vibration yam tsis muaj nkig tsis ua haujlwm. |
| Impact Toughness (-20℃KV₂) | Ntau dua lossis sib npaug li 24 J | Guarantees tiv thaiv nkig tawg nyob rau hauv txias - huab cua tej yam kev mob. |
NM 400
Cov txheej txheem ntau lawm ntws
Kev tsim khoom ntawm NM400 yog qhov ua tau zoo, ntau- cov txheej txheem theem uas xav tau kev tswj xyuas meej ntawm txhua kauj ruam:
Smelting: Thawj smelting yog ua nyob rau hauv lub converter los yog hluav taws xob rauv, ua raws li los ntawm ladle refining (LF / VD, thiab lwm yam). Kev tswj nruj nruj yog tswj xyuas qhov nqaim ntawm qhov hloov pauv hauv qhov purity thiab tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlau molten, txo cov ntsiab lus ntawm cov teeb meem xws li phosphorus thiab sulfur.
Nruam Casting thiab Slab cua sov: Molten steel yog cam khwb cia rau hauv slabs siv lub nruam casting tshuab, thiab ces rhuab nyob rau hauv lub cua sov rauv rau ib tug tshwj xeeb kub ntau yam los npaj lub microstructure rau tom ntej dov.
Tswj Rolling: Ib ob -theem tswj dov txheej txheem yog siv los ua kom zoo dua cov nplej ua ntej austenite: ntxhib dov hauv cheeb tsam recrystallization kom tawg raws li - cov qauv cam khwb cia, ua kom tiav dov hauv qhov tsis yog -recrystallization cheeb tsam txhawm rau txhawm rau deformation zog - qhov chaw ua kom zoo rau kev hloov pauv ntau dua qhov ntau thiab tsawg feem ntau Tsawg dua lossis sib npaug li 50μm. Qhov ua tiav dov kub yog feem ntau khaws cia ntawm 800-900℃txhawm rau txhim kho cov nplej kom zoo.
Quenching (Core Kauj Ruam ntawm Tempering): Tam sim ntawd tom qab dov, lub phaj nkag mus ncaj qha quenching siv siab - cov dav hlau dej siab, ua tiav qhov cua txias tshaj 30℃/ s los txhawb kev tsim martensite. quenching kub yog tswj nyob rau hauv thaj tsam ntawm 900-930℃kom ua tiav yuav luag tiav austenitization. Cov txheej txheem no yuav tsum ua tib zoo sib npaug: cov phaj tuab, tshuaj lom neeg muaj pes tsawg leeg, thiab kev siv dej txias txhua qhov cuam tshuam rau qhov kawg hardness thiab dhau los ntawm - thickness uniformity.
Tempering: quenched daim hlau ces qis dua -kub tempering ntawm 180-250℃. Cov kauj ruam no txo cov quenching - ntxias cov residual stresses, me ntsis kho qhov hardness - toughness tshuav nyiaj li cas, thiab stabilizes lub microstructure kom zoo ib yam nyob rau hauv - kev pab cuam. Tempering kub yuav tsum tau khaws cia qis dua 300℃kom tiv thaiv kom tsis txhob muaj qhov tawv tawv dhau los ntawm ntau tshaj -tempering thiab martensite softening
Kev siv tshuab
Txiav
Nplaim txiav, txiav plasma, lossis laser txiav tuaj yeem siv. Thaum lub sij hawm hluav taws kub txiav, vim lub siab hardness thiab siab carbon sib npaug, muaj ib tug tseem ceeb nyiam rau txias cracking; preheating yog tsim nyog ua ntej txiav. Preheating rau 150 ~ 200℃yog pom zoo, thiab preheating yog yuav tsum tau rau thicknesses tshaj 30 hli. Plasma txiav yog tsim rau nruab nrab - daim hlau nyias (<50mm), offering fast cutting speeds and a small heat-affected zone. Laser cutting is suitable for thin and medium-thick plates, achieving an accuracy of ±0.1mm, and is suitable for machining complex-shaped parts.
Vuam
NM500 muaj qhov sib npaug ntawm cov alloy siab thiab siab carbon sib npaug, ua rau nws nkag siab rau cov txheej txheem vuam thiab nthuav tawm qhov tseem ceeb rau kev sib tsoo txias. Weldability tsis zoo (20†L2-L3). Preheating rau qhov tsim nyog kub (feem ntau tshaj 100 ~ 150 degree) yog qhov tseem ceeb ua ntej vuam. Tsawg- hydrogen vuam pas nrig lossis cov xov hlau yuav tsum tau siv, thiab cov khoom siv hluav taws xob yuav tsum tau tswj nruj me ntsis. Thaum lub sij hawm vuam, lub hauv paus ntsiab lus ntawm "xaiv cov khoom siv vuam zog raws li cov khoom siv nrog lub zog qis thiab txiav txim siab qhov kub thiab txias raws li cov khoom siv nrog lub zog siab dua" yuav tsum ua raws. Tom qab-weld stress-relief annealing yog pom zoo kom tshem tawm cov kev ntxhov siab nyob hauv qhov sib koom ua ke.
Main daim ntawv thov scenarios
NM400 yog siv dav hauv hnav-cov khoom siv tiv thaiv kev lag luam, muab kev hnav- tiv thaiv rau cov khoom tseem ceeb. Nws cov ntawv thov tseem ceeb suav nrog:
Mining Machinery: Excavator thoob, txiav ntug, thiab sab txiav ntug; crusher liners; dump tsheb lub cev thiab hauv qab daim hlau; hloov conveyor troughs thiab ntsia hlau feeders.
Siv Machinery: Bulldozer thoob daim hlau, loader txiav npoo, scraper conveyor troughs, thiab lwm yam.
Metallurgical Machinery: Sintering tshuab trolleys, blast furnace tswb, thiab hnav- cov ntaub ntawv tiv thaiv rau cov khoom siv coking, muaj peev xwm tiv taus siab - qhov kub thiab txias txog li 400℃.
Coal thiab Fais Fab Machinery: Pulverized thee conveying pipelines, thee mill liners, dust collector flues, fan impeller housings, the coal crusher liners, thee hoppers, and screw feeders, etc.
Cov Khoom Siv Hauv Tsev: Cov cement zeb liners, cib tshuab pwm, txo cov nqi tsim khoom los ntawm kev txhim kho hnav tsis kam.
Tsis tas li ntawd, NM400 kuj tseem siv me me hauv kev tsim cov khoom precision xws li abrasives thiab bearings. Nrog rau kev txhim kho txuas ntxiv ntawm thev naus laus zis, qib siab- kawg qib xws li NM500D thiab NM500E tau ua tiav zoo rau cov khoom siv tshiab xws li cov ntse loj crushers thiab dav - lub cev mining tsheb.
Qib Kev Sib Piv thiab Kev Xaiv Phau Ntawv Qhia
| Qib | Hardness Range (HBW) | Hnav Resistance | Toughness | Siv tau cov xwm txheej ua haujlwm |
|---|---|---|---|---|
| NM 400 | 370–440 | Lub hauv paus | Zoo heev | Kev hnav nruab nrab, sib npaug tag nrho kev ua tau zoo, haum rau hnyav hnyav loads |
| NM450 | 410–480 | Siab (15-30% siab dua NM400) | Zoo | Comprehensive kev ua tau zoo, zoo sib npaug ntawm toughness thiab hardness |
| NM 500 | 470–540 | Siab heev | Txwv tsis pub | Kev hnav siab, qhov cuam tshuam qis rau nruab nrab; nyiam rau qhov hnyav hnav ib puag ncig |
Tiv tauj peb hnub no rau cov nqi hwm NM500 hnav- cov ntawv hlau tiv taus - zoo dua hardness, zoo heev durability, thiab cov nqi sib tw kom ntev koj cov khoom siv lub neej.
Peb muab:
Ua tib zoo siab - zoo NM500 steel daim hlau
Ua tiav Factory Test Certificate (MTC)
Customizable qhov ntau thiab tsawg, xa khoom sai
Tiv tauj peb hnub no rau cov lus sib tw heev thiab txo koj cov nqi ntawm qhov project los ntawm kev siv NM500 steel daim hlau.
Tiv tauj peb tam sim no rau ib nqe lus
FAQ:
NM400 steel yog dab tsi?
NM400 Phaj yog lub siab -lub zog, hnav- cov hlau tsis muaj zog paub txog nws qhov ua tau zoo dua thiab muaj zog. NM400 yog Suav GB tus qauv steel qib. Cov khoom siv NM 400 yog siv dav hauv kev lag luam uas tsis kam tiv thaiv kev puas tsuaj (ua puas resistant) yog ib qho tseem ceeb, xws li hauv kev tsim kho thiab mining sectors.
Puas yog NM400 tib yam li AR400?
Tsis yog. NM400 thiab AR400 yog ob qho tib si 400 HB-chaw hnav daim hlau, tab sis lawv tsis yog tib qib lossis tus qauv.
Puas yog NM400 sib npaug rau AR400?
NM400 tuaj yeem siv los ua AR400 lwm txoj hauv ntau daim ntawv thov hnav, tab sis MTC thiab cov phiaj xwm yuav tsum tau kuaj xyuas ua ntej.
Lub hardness ntawm NM400 vs AR400 yog dab tsi?
NM400 feem ntau yog 370-430 HBW, thaum AR400 feem ntau yog 360-444 BHN.
NM400 puas tuaj yeem hloov AR400 rau liners thiab chutes?
Yog lawm. Hauv ntau daim ntawv thov zawv zawg, NM400 tuaj yeem txiav txim siab rau cov hlua khi, cov hlua khi, hoppers, thiab cov khoom zoo sib xws.