Q500E thiabQ550E yog ob qho tib si qis- alloy siab- lub zog cov qauv hlau ntawm qib E hauv Suav teb, uas tuaj yeem tswj hwm qhov cuam tshuam zoo ntawm -40℃thiab tau siv dav hauv ntau yam haujlwm tseem ceeb thiab kev tsim khoom. Qhov sib txawv ntawm 50MPa hauv cov txiaj ntsig muaj zog ua rau lawv muaj qhov sib txawv me me ntawm cov tshuaj lom neeg muaj pes tsawg leeg, kev tswj xyuas qhov tseeb, tus nqi, thiab daim ntawv thov scenarios.
Tshuaj muaj pes tsawg leeg
Ob lub steels txais yuav tsawg- carbon tsim thiab tso siab rau micro- alloy cov ntsiab lus los txhim kho kev ua tau zoo, tab sis Q550E muaj qhov ua kom zoo dua qub ntawm cov hlau alloy kom ua tiav lub zog siab dua. Cov kev sib piv tshwj xeeb yog raws li hauv qab no:
| Element | Q500E | Q550E |
|---|---|---|
| Cov pa roj carbon (C) | 0.10%-0.20% | Tsawg dua lossis sib npaug li 0.18% |
| Silicon (Si) | Tsawg dua los yog sib npaug li 0.50% | Tsawg dua lossis sib npaug li 0.6% |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.70% | Tsawg dua lossis sib npaug li 2.00% |
| Phosphorus (P) | Tsawg dua los yog sib npaug li 0.025% -0.030% | Tsawg dua lossis sib npaug li 0.025% |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015% -0.025% | Tsawg dua lossis sib npaug li 0.02% |
| Micro- alloy cov khoom | Nb Tsawg dua lossis sib npaug rau 0.06%, V Tsawg dua lossis sib npaug rau 0.12%, Ti Tsawg dua lossis sib npaug rau 0.05%, uas ua kom cov nplej zoo dua qub thiab txhim kho lub zog thiab tawv los ntawm nag lossis daus. | Nb Tsawg dua lossis sib npaug rau 0.060%, V Tsawg dua lossis sib npaug rau 0.120%, Ti Tsawg dua lossis sib npaug li 0.20%, nrog cov ntsiab lus Ti siab dua, thiab cov txiaj ntsig ntxiv dag zog ntawm micro- cov ntsiab lus alloy yog qhov tseem ceeb dua |
| Lwm yam alloys | Cr Tsawg dua lossis sib npaug li 1.5%, Ni Tsawg dua lossis sib npaug li 2.0%, uas txhim kho corrosion kuj thiab qis -kub toughness | Cr Tsawg dua lossis sib npaug li 1.20%, Ni Tsawg dua lossis sib npaug rau 0.30%, Cu Tsawg dua lossis sib npaug rau 0.30%, nrog ntxiv Mo Less dua lossis sib npaug rau 0.10% txhawm rau txhim kho siab dua - qhov kub thiab txias |
Mechanical Properties
Qhov tseem ceeb sib txawv ntawm ob yog nyob rau hauv lub zog tawm los. Q550E muaj zog dua, thaum Q500E muaj qhov zoo dua ductility thiab toughness. Cov cuab yeej cuab tam tshwj xeeb ntsuas yog raws li hauv qab no:
| Performance Indicator | Q500E | Q550E |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 500MPa (rau thickness Tsawg dua lossis sib npaug li 50mm) | Ntau tshaj los yog sib npaug rau 550MPa (rau thickness Tsawg dua los yog sib npaug rau 50mm) |
| Tensile zog | 580 - 780MPa | 600 - 800MPa |
| Elongation | Ntau dua lossis sib npaug li 17% | Ntau dua lossis sib npaug li 16% |
| Impact toughness | Ntau dua lossis sib npaug rau 27J ntawm -40℃(ntev), qee cov khoom tuaj yeem ncav cuag Ntau dua lossis sib npaug rau 47J | Ntau dua lossis sib npaug rau 34J ntawm -40 degree |
| Khoov kev ua tau zoo | Qhov tsawg kawg yog khoov txoj kab uas hla yog 4 npaug ntawm lub phaj thickness | Lub taub hau txoj kab uas hla yog 3 npaug ntawm lub phaj thickness, thiab kev khoov zoo heev |
Kev tsim khoom thiab kev ua haujlwm
Ob leeg tuaj yeem txais TMCP thermo- cov txheej txheem tswj kev siv tshuab lossis quenching thiab tempering txheej txheem, tab sis Q550E muaj cov kev cai nruj dua ntawm cov txheej txheem tsis ua kom muaj zog ruaj khov:
- Q500E: Nws tuaj yeem tsim los ntawm TMCP txheej txheem ib leeg. Thaum siv cov txheej txheem quenching thiab tempering, quenching kub yog 880 - 920℃thiab tempering kub yog 550 - 650℃. Cov kev cai rau kev tswj qhov kub thiab txias yog qhov xoob. Qhov kev hloov pauv ntawm cov khoom siv tshuab tuaj yeem tswj tau hauv ± 20MPa los ntawm kev tswj cov dov thiab tshuab cua txias. Nws cov vuam preheating kub yog 150 - 200℃, thiab cov vuam sib koom ua ke tuaj yeem ncav cuag ntau dua 95% ntawm cov hlau hauv paus.
- Q550E: Nws feem ntau tso siab rau kev sib xyaw ntawm micro-alloying thiab quenching thiab tempering txheej txheem. Kev tswj cov cua kub thiab cua txias hauv cov txheej txheem ntau lawm yog qhov tseeb dua kom tsis txhob muaj kev ua tau zoo los ntawm cov qauv tsis sib xws. Nws yog tsim rau ntau txoj kev vuam xws li phau ntawv arc vuam thiab submerged arc vuam. Txawm hais tias nws muaj kev ua haujlwm vuam zoo, vim nws lub zog ntau dua, nws yuav tsum tau them sai sai rau kev tswj cov cua sov thaum lub sij hawm vuam los tiv thaiv softening ntawm tshav kub- thaj tsam cuam tshuam.
Daim ntawv thov Scenario
Ob qho tib si sib txawv hauv daim ntawv thov raws li cov kev xav tau ntawm lub zog thiab cov nqi txiav txim siab. Q500E yog dav siv nyob rau hauv dav dav dav - zog teb, thaum Q550E yog ntau inclined rau siab - cov kev ntxhov siab Cheebtsam:
- Q500E: Nws muaj tus nqi siab ua tau zoo thiab tau siv dav hauv ntau qhov chaw. Nyob rau hauv engineering machinery, nws yog siv los ua boom ntawm SY950H excavator, uas tuaj yeem txo qhov hnyav los ntawm 15% piv nrog cov khoom siv Q460. Hauv kev tsim choj, nws yog siv rau chord thiab web cov tswv cuab ntawm ntev - ncua choj, xws li cov koom haum pab hauv Hong Kong-Zhuhai-Macao Choj. Nyob rau hauv lub zog tshiab, nws yog siv raws li cov yeeb nkab steel pawg ntawm offshore cua zog tej yaam num, thiab nws cov kev pab cuam lub neej muaj peev xwm ncav cuag 30 xyoo nrog anti{10}} txheej corrosion.
- Q550E: Nws yog tsim rau cov khoom uas muaj kev ntxhov siab ntau dua. Hauv kev tsim kho, nws yog siv los ua cov tub ntxhais thauj khoom -cov kabmob ntawm super siab- cov tsev ua haujlwm nce siab kom txo tau cov hlau siv thiab nthuav dav hauv qhov chaw. Nyob rau hauv lub tshav pob ntawm engineering machinery, nws yog siv los ua lub boom ntawm loj excavators uas muaj feem xyuam rau loads. Hauv kev tsim cov nkoj, nws yog siv rau cov khoom hauv lub nkoj uas yuav tsum tau tiv thaiv qhov cuam tshuam ntawm cov nthwv dej thiab cov dej khov, ua kom muaj kev nyab xeeb ntawm cov nkoj hauv hiav txwv hnyav.
Tus nqi tsim khoom thiab kev ua lag luam
- Q500E: Cov txheej txheem ntau lawm yog mature. Cov txheej txheem TMCP tuaj yeem txo qhov kev thov rau kev kho cua sov. Feem ntau nruab nrab thiab loj steel mills tuaj yeem tsim nws ruaj khov. Kev lag luam khoom txaus txaus, thiab tus nqi yog qhov ruaj khov, feem ntau nyob ib ncig ntawm 8000 - 10000 yuan/ton. Nws yog lub ntsiab lus siab -lub zog steel hauv kev ua lag luam.
- Q550E: Nws muaj cov kev xav tau ntau dua rau kev faib ua feem ntawm cov ntsiab lus alloy thiab cov txheej txheem precision. Tus nqi ntawm cov ntsiab lus alloy thiab kev kho cua sov yog siab dua. Nws tus nqi lag luam yog kwv yees li 10% - 20% siab dua li ntawm Q500E. Tam sim no, nws yog tsim los ntawm cov hlau tseem ceeb xws li Wuyang Hlau thiab Hlau. Kev lag luam xav tau yog tsom rau hauv siab - cov khoom tsim khoom kawg, thiab qhov xav tau ntim tsawg dua li ntawm Q500E.
Nyob rau hauv qis -kub engineering tej yaam num nyob rau hauv cheeb tsam alpine, qhov twg yog qhov zoo dua ntawm Q500E thiab Q550E, thiab yog vim li cas?
Qhov kev xaiv nyob ntawm qhov tshwj xeeb thauj khoom -cov cai yuav tsum muaj. Yog tias nws yog ib feem ntawm cov txheej txheem xws li tus choj pab txhawb nqa, Q500E yog qhov tsim nyog dua. Nws muaj kev cuam tshuam zoo heev ntawm -40℃thiab ductility zoo dua, uas tuaj yeem zam kev puas tsuaj hauv qab qis - qhov kub thiab txias. Yog hais tias nws yog ib qho tseem ceeb load- bearing tivthaiv xws li lub ntsiab nqaj ntawm ib tug loj - ncua choj nyob rau hauv ib cheeb tsam alpine, Q550E yog nyiam. Nws tsis tsuas yog ua tau raws li qhov tsawg- qhov kub thiab txias qhov yuav tsum tau muaj tab sis kuj muaj lub zog tawm los ntau dua, uas tuaj yeem tiv taus qhov sib xyaw ua ke ntawm qhov kub thiab txias thiab lub tsheb siab.
Dab tsi yog qhov sib txawv ntawm kev ua haujlwm nyuaj ntawm Q500E thiab Q550E hauv kev tsim cov tshuab engineering?
Q500E yooj yim rau kev ua. Nws qhov elongation tus nqi ntau dua lossis sib npaug li 17% ua rau nws tsis yooj yim rau tawg thaum khoov thiab txiav. Thaum ua cov crane dav dav, cov cuab yeej ua haujlwm zoo tib yam tuaj yeem ua tiav kev tsim. Q550E muaj qis dua elongation. Thaum ua cov khoom siv nrog cov duab nyuaj xws li lub excavator txav caj npab, nws yog ib qho tsim nyog los tswj qhov khoov ceev thiab txias npaum li cas nruj me ntsis. Thaum lub sij hawm vuam, nws yog ib qho tsim nyog yuav tsum ua kom haum cov khoom siv vuam tshwj xeeb kom ntseeg tau tias lub zog ntawm vuam sib koom ua ke, yog li kev ua haujlwm nyuaj thiab qhov yuav tsum tau muaj siab dua.
Vim li cas Q500E muaj qhov zoo dua hauv thaj tsam ntawm ntug hiav txwv cua zog dua Q550E?
Ntawm qhov tod tes, lub tshav dav hlau tawm sab nraud muaj qhov xav tau loj rau cov hlau, thiab Q500E muaj tus nqi qis dua, uas tuaj yeem txo cov nqi tag nrho. Ntawm qhov tod tes, Q500E muaj cov ntsiab lus Ni siab dua, uas muaj kev tiv thaiv corrosion zoo dua hauv ntsev - huab cua hauv hiav txwv. Txawm hais tias Q550E muaj lub zog ntau dua, lub zog ntawm Q500E yog txaus kom ua tau raws li qhov yuav tsum tau ua ntawm cua zog ntauwd raj thiab cov yeeb nkab steel. Qhov zoo ntawm Q550E tsis tuaj yeem ua tiav tag nrho, yog li Q500E tau siv ntau dua.