Q890DthiabQ960D yog ob qho tib si siab - lub zog quenched thiab tempered structural steels ua raws li GB / T 16270 - 2009, cim los ntawm qib "D" uas ua kom muaj kev cuam tshuam toughness ntawm -20℃. Qhov sib txawv ntawm 70MPa nyob rau hauv lawv lub zog tawm los ua rau muaj qhov sib txawv ntawm cov hlau alloy tsim, kev ua haujlwm, thiab cov xwm txheej ntawm daim ntawv thov.
Mechanical Properties: Gradient Difference nyob rau hauv lub zog thiab ib txwm Toughness Foundation
Txawm hais tias ob qho tib si steels muaj qhov zoo qis - kub toughness, lawv lub zog ntsuas ua kom pom tseeb gradient, uas ncaj qha txhais lawv cov load-cov kabmob muaj peev xwm ciam teb. Cov cuab yeej cuab tam tshwj xeeb sib txawv yog raws li hauv qab no:
| Performance Indicator | Q890D | Q960D |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | Ntau dua lossis sib npaug rau 890MPa (Ntau dua lossis sib npaug rau 860MPa rau daim hlau ntawm 31 - 50mm thickness) | Ntau dua lossis sib npaug rau 960MPa |
| Tensile zog | 950 - 980MPa | 980 - 1150MPa |
| Elongation | Ntau dua lossis sib npaug li 10% (Ntau dua lossis sib npaug rau 12% rau daim hlau ntawm 8 - 30mm thickness) | Ntau dua lossis sib npaug li 10% |
| Impact Zog ntawm -20 degree | Ntau dua lossis sib npaug rau 34J | Ntau dua lossis sib npaug rau 27J (tuaj yeem ncav cuag 34J nrog cov txheej txheem zoo) |
| Hardness | HBW 290 - 340 | me ntsis siab dua Q890D, feem ntau HBW 320 - 380 |
Q890D ua tiav qhov sib npaug ntawm lub zog thiab tawv. Nws cov qauv zoo -grained qauv (ASTM 9 - 10 qib) ua rau nws muaj kev ruaj ntseg cuam tshuam kev ua tau zoo thaum muaj lub zog siab. Q960D ua rau muaj kev sib tw hauv kev tawm dag zog. Txawm hais tias nws qhov elongation thiab cuam tshuam lub zog me ntsis qis dua li Q890D, nws tuaj yeem ua tau raws li qhov yuav tsum tau ua kom muaj zog ntawm qis - kub hnyav -load scenarios los ntawm kev tswj xyuas qhov kub thiab txias. Ntxiv mus, Q960D tuaj yeem hloov kho nrog Z15 / Z25 / Z35 thickness - cov qib kev ua tau zoo txhawm rau txhim kho nws cov kev tiv thaiv rau lamellar tearing.
Chemical Composition thiab Strengthening Mechanism: Moderate Alloy Matching vs High - Precision Component Optimization
Qhov sib txawv ntawm lub zog ntawm ob lub steels stems los ntawm kev faib ua feem ntawm cov ntsiab lus alloy thiab kev tsim cov txheej txheem ntxiv dag zog, thiab ob qho tib si txais yuav tsawg - carbon designs los xyuas kom meej weldability.
- Q890D: Tsom ntsoov rau qhov sib npaug ntawm cov alloy collocation. Nws cov ntsiab lus carbon tsawg dua lossis sib npaug li 0.20%, thiab nws tsuas yog tso siab rau kev sib koom ua ke ntawm chromium (0.30 - 0.80%), molybdenum (0.15 - 0.50%), vanadium, thiab niobium (tag nrho cov ntsiab lus ntawm V + Nb yog 0.04 - 0.24%) rau kev ntxiv dag zog. Molybdenum txhim kho hardenability, thiab vanadium - niobium precipitates daim nano - loj carbides los ua kom zoo nplej. Qhov kev tsim no tswj cov nqi thaum ua tiav kev txhim kho lub zog, thiab nws cov pa roj carbon sib npaug yog tsawg dua lossis sib npaug li 0.48%, uas yog qhov tsim nyog los txo qhov kev pheej hmoo ntawm vuam.
- Q960D: Ua raws siab - lub zog - taw qhia kev ua kom zoo. Thaum khaws cov ntsiab lus carbon tsawg dua los yog sib npaug li 0.20%, nws ua rau qhov kev faib ua feem ntawm siab - efficiency ntxiv dag zog rau cov ntsiab lus. Cov ntsiab lus ntawm chromium tuaj yeem siab li 1.50%, molybdenum txog 0.70%, thiab npib tsib xee txog 2.0%. Cov ntsiab lus no txhim khu kev daws teeb meem ntxiv dag zog thiab tempering stability. Lub caij no, kev tswj hwm nruj ntawm cov ntsiab lus tsis huv (P Tsawg dua lossis sib npaug rau 0.025%, S Tsawg dua lossis sib npaug rau 0.015%) zam qhov pib tawg. Txawm li cas los xij, cov ntsiab lus siab dua ntawm cov ntsiab lus alloy kuj ua rau qhov nyuaj ntawm kev smelting thiab tswj cov txheej txheem.
Kev yuav tsum tau ua: Kev Nyuaj Siab vs Precision Control
Qhov sib txawv ntawm lub zog ua rau muaj qhov tsis sib xws hauv kev ua haujlwm xws li vuam, txiav, thiab sib sau. Kev ua haujlwm nyuaj ntawm Q960D yog qhov siab dua, xav tau cov txheej txheem kev ua haujlwm kom ntseeg tau tias kev ua haujlwm ruaj khov.
Vuam
- Q890D: Nws muaj qhov zoo weldability. Rau daim hlau nrog thickness tsawg dua los yog sib npaug li 50 hli, qhov kub ntawm lub preheating tsuas yog yuav tsum yog 100 - 150℃. Vuam cov ntaub ntawv xws li E12015 - G thiab ER110 - G tuaj yeem siv tau, thiab tom qab - vuam kev kho cua sov tsis tsim nyog rau cov khoom siv dav dav. Qhov cuam tshuam lub zog ntawm vuam cua sov - cuam tshuam cheeb tsam tuaj yeem ncav cuag ntau dua 27J.
- Q960D: Tsawg - cov khoom siv hydrogen vuam yuav tsum tau siv los tiv thaiv cov kab mob khaub thuas. Lub preheating kub yuav tsum tau nce mus rau 150 - 200℃, thiab vuam cua sov input yuav tsum nruj me ntsis tswj kom tsis txhob softening ntawm tshav kub - cuam tshuam cheeb tsam. Rau qhov tseem ceeb load-cov khoom siv bearing, post - weld hydrogen tshem tawm kev kho cua sov yog qhov yuav tsum tau ua, uas txuas ntxiv lub voj voog kev tsim kho thiab nce nqi ua haujlwm.
Txiav thiab sib sau
- Q890D: Rau daim hlau Tsawg dua los yog sib npaug li 30 hli, txias dabtsi yog khoov tuaj yeem ua ncaj qha nrog lub vojvoog dabtsi yog khoov ntawm 3 npaug ntawm cov phaj tuab. Nplaim txiav yog siv tau rau feem ntau cov thicknesses, thiab cov kev ua tau zoo yog 15% siab tshaj qhov zoo sib xws siab - lub zog steels.
- Q960D: Laser los yog plasma txiav yog pom zoo rau nyias daim hlau Tsawg dua los yog sib npaug rau 20mm los xyuas kom meej incision. Rau cov phaj tuab Ntau dua lossis sib npaug ntawm 30mm, preheating ua ntej nplaim taws txiav yuav tsum tau tiv thaiv kom tawv nqaij ntawm tshav kub - cuam tshuam cheeb tsam. Thaum khoov txias, xav tau lub vojvoog loj dua, thiab qhov kub ua haujlwm feem ntau yuav tsum tau rov qab - quenching thiab tempering kom tsis txhob muaj kev ua haujlwm degradation.
Engineering Applications: Nruab nrab - rau - High Load vs Ultra - High Load Core Cheebtsam
Ob lub steels tau muab faib kom meej rau hauv daim ntawv thov scenarios, sib txawv theem ntawm load - bearing thiab ua hauj lwm ib puag ncig yuav tsum tau.
- Q890D: Nws yog tus nqi - kev xaiv zoo rau nruab nrab - rau - siab load Cheebtsam. Nws yog dav siv nyob rau hauv excavator thoob rods, mining dump tsheb thav ntawv, thiab lub ntsiab girders ntawm 1000 - tuj cranes. Piv txwv li, tom qab siv Q890D rau excavator thoob rods, phab ntsa thickness yuav raug txo los ntawm 60mm mus rau 40mm, thiab qhov hnyav yuav txo tau los ntawm 33% thaum ua kom muaj kev cuam tshuam. Nws kuj yog siv rau cable towers ntev - span cable - nyob txuas hniav thiab 70MPa siab - siab hydrogen cia tanks, ntsuas kev ua tau zoo thiab nqi.
- Q960D: Nws yog tsuas yog siv rau core load - bearing Cheebtsam nyob rau hauv heev scenarios. Hauv kev txhawb nqa thee mine hydraulic, hloov cov tsoos hlau nrog Q960D tuaj yeem txo qhov hnyav ntawm ib lub tshuab los ntawm 20%. Nws kuj yog siv rau hauv boom ntawm loj - tonnage port cranes, siab hulls ntawm sib sib zog nqus - submersibles, thiab structural qhov chaw ntawm aerospace khoom. Cov teb no muaj cov kev cai nruj ntawm kev txo qhov hnyav thiab thauj khoom - bearing muaj peev xwm, thiab kev ua haujlwm siab ntawm Q960D yog irreplaceable.
Tus nqi - Qhov txiaj ntsig zoo: Tus nqi sib npaug - Kev ua tau zoo vs siab - Tus nqi nqis peev
Muaj tus nqi sib txawv ntawm ob lub steels, thiab lawv cov nqi - cov txiaj ntsig zoo sib xws rau qhov sib txawv ntawm qhov project.
| Tus nqi ntsuas - ntsig txog | Q890D | Q960D |
|---|---|---|
| Tus nqi lag luam | Noj cov phaj tuab ua piv txwv, tus nqi yog kwv yees li 9000 - 11000 yuan/ton | 12000 - 15000 yuan/ton, uas yog 30% - 40% siab dua Q890D |
| Tus nqi tsim nyog | Tus nqi ntawm cov ntsiab lus alloy yog nruab nrab, thiab cov nqi ua haujlwm tsawg vim yog cov txheej txheem yooj yim | Cov nqi hlau alloy siab, ntxiv rau cov nqi ntxiv rau kev kho cua sov precision thiab qhov tsis zoo |
| Ntev - Lub sij hawm tus nqi | Haum rau tej yaam num uas muaj kev pab lub neej ntawm 20 - 25 xyoo, txo txij nkawm zaus rau dav dav - load Cheebtsam |
Hauv kev tsim cov thee mine hydraulic kev txhawb nqa, vim li cas Q960D yog qhov tsim nyog tshaj Q890D rau ultra-cov xwm txheej ua haujlwm siab?
Q960D muaj qhov tsawg kawg nkaus tawm lub zog ntawm 960MPa, 70MPa siab dua Q890D. Qhov txiaj ntsig ntawm lub zog no ua rau nws tuaj yeem tiv taus ultra- ua haujlwm siab (Ntau dua lossis sib npaug rau 18000kN) thaum txo cov tuab ntawm cov kab txhawb nqa, ua tiav cov qauv tsim. Tsis tas li ntawd, Q960D muaj kev tswj hwm nruj dua ntawm cov teeb meem tsis huv thiab zoo dua lamellar tearing tsis kam, uas tuaj yeem zam kev ua haujlwm tsis zoo nyob rau hauv kev ntxhov siab, ua kom muaj kev nyab xeeb ntawm cov khoom siv hluav taws xob.
Dab tsi yog cov ntsiab lus tseem ceeb ntawm kev tswj cov txheej txheem vuam thaum siv Q960D los tsim cov khoom sib sib zog nqus -cov khoom siv dej hiav txwv?
Peb lub ntsiab lus tseem ceeb yuav tsum tau tswj hwm. Ua ntej, siv tsawg-hydrogen siab- cov khoom siv vuam siv zog los txo qhov kev pheej hmoo ntawm cov kab mob khaub thuas. Qhov thib ob, preheat lub hauv paus hlau mus rau 150-200℃rau cov phaj tuab kom qeeb qhov cua txias ntawm thaj tsam weld. Thib peb, tswj cov vuam cua sov input nyob rau hauv 15–25kJ/cm kom tsis txhob softening ntawm tshav kub- thaj tsam cuam tshuam. Tom qab vuam, nqa tawm hydrogen tshem tawm kev kho cua sov ntawm 550-600℃kom tshem tawm cov seem hydrogen thiab kev ntxhov siab sab hauv, ua kom lub sijhawm ntev -kev ruaj ntseg ntawm qhov tob{14}} hiav txwv Cheebtsam.
Rau cov chaw tsim khoom siv tshuab nrog cov peev nyiaj tsawg, qhov twg yog tus nqi ntau dua - zoo ntawm Q890D thiab Q960D thaum tsim 800-tuj crane booms?
Q890D yog tus nqi ntau dua -zoo. Lub 800-tuj crane boom belongs rau nruab nrab- siab load scenario, thiab Q890D lub zog tawm los ntawm Ntau dua los yog sib npaug rau 890MPa tuaj yeem ua tau raws li qhov xav tau ntawm kev thauj khoom. Nws tus nqi lag luam yog 30-40% qis dua Q960D, uas tuaj yeem txo cov nqi yuav khoom. Tsis tas li ntawd, Q890D muaj kev ua tau zoo dua, txo cov nqi ua haujlwm, thiab tuaj yeem tswj tau tag nrho cov nqi tsim khoom ntawm crane boom thaum ua kom muaj kev ua tau zoo.