Stress Relaxation Suppression Technology thiab Ntev -Lub Sijhawm Fastening Performance Guarantee ntawm Elastic Clips
Dab tsi yog qhov tsim mechanism ntawm kev ntxhov siab so ntawm elastic tuav?
Lub tiam mechanism ntawm kev ntxhov siab so ntawm elastic tuav yog tiasnyob rau hauv qhov kev txiav txim ntawm lub sij hawm ntev - lub sij hawm tas li strain, microstructure nyob rau hauv lub elastic bars undergoes qeeb kev hloov, ua rau kom maj mam attenuation ntawm elastic kev nyuaj siab. Tom qab kev teeb tsa, lub elastic bar yog nyob rau hauv lub xeev ntawm nruam elastic deformation, nrog siab residual kev nyuaj siab nyob rau hauv. Raws li ob qho kev cuam tshuam ntawm lub tsheb ciav hlau vibration load thiab ambient kub hloov, lub microscopic nplej yuav ua rau qeeb qeeb thiab dislocation txav. Qhov no microscopic txav maj mam hloov cov elastic deformation ntawm elastic bar rau hauv cov yas deformation, thiab cov elastic kev nyuaj siab poob raws li, uas yog manifested raws li lub nruam attenuation ntawm clamping quab yuam. Tus nqi ntawm kev ntxhov siab so yog ze rau qhov kub thiab txias: rau txhua txhua 10℃qhov kub thiab txias, tus nqi so nce 1-2 zaug, yog li qhov teeb meem ntawm elastic bar so yog qhov tseem ceeb nyob rau hauv high-temperature. Tsis tas li ntawd, cov ntsiab lus impurity (xws li sulfur thiab phosphorus) nyob rau hauv cov khoom siv elastic yuav ua rau kom cov nplej plam thiab ntxiv cov kev so kom txaus, uas yog ib qho tseem ceeb rau kev so siab ntawm lub caij nplooj ntoos hlav steel elastic bar. Thaum muaj kev ntxhov siab nyob rau hauv ib qho twg, lub clamping quab yuam ntawm elastic bar yuav qis dua tus nqi tsim, uas tsis tuaj yeem tswj cov tsheb ciav hlau zoo thiab ua rau muaj kev phom sij rau txoj kab.
Dab tsi yog cov khoom tseem ceeb ntawm cov qauv kev ua kom zoo rau kev ntxhov siab so inhibition ntawm elastic tuav?
Cov ntaub ntawv tseem ceeb ntawm cov mis optimization ntsuas rau kev ntxhov siab so inhibition ntawm elastic tuav yogsiv tsawg- alloy caij nplooj ntoos hlav steel thiab precisely tswj cov ntsiab lus ntawm alloy ntsiabtxhawm rau txhim kho kev tiv thaiv- so kom txaus ntawm cov khoom siv. Cov khoom siv hauv paus xaiv 60Si2CrVA qis- alloy caij nplooj ntoos hlav steel. Piv nrog rau cov hlau zoo tib yam 60Si2Mn, cov khoom no ntxiv chromium (Cr) thiab vanadium (V) alloy ntsiab. Chromium tuaj yeem ua kom zoo dua cov nplej, txhim kho cov txiaj ntsig zoo thiab lub zog ntawm cov khoom, thiab txo qhov ua tau ntawm cov nplej plam; vanadium tuaj yeem tsim cov carbides ruaj khov, tus pin lis ciam teb, cuam tshuam kev txav mus los, thiab txo qis kev ntxhov siab. Cov ntsiab lus ntawm cov ntsiab lus alloy yuav tsum tau tswj nruj me ntsis: cov ntsiab lus chromium yog 0.9%-1.2%, vanadium cov ntsiab lus yog 0.15%-0.25%, cov ntsiab lus silicon yog 1.4%-1.6%. Cov ntsiab lus siab ntawm cov hlau ntau dhau yuav ua rau cov khoom siv brittleness, thaum cov ntsiab lus tsawg heev tsis tuaj yeem ua tiav cov txiaj ntsig zoo tshaj plaws los tiv thaiv kev so. Nyob rau tib lub sijhawm, cov ntsiab lus ntawm impurity ntsiab xws li sulfur thiab phosphorus yuav tsum nruj me ntsis tswj: cov ntsiab lus sulfur tsawg dua los yog sib npaug rau 0.02%, phosphorus cov ntsiab lus tsawg dua los yog sib npaug rau 0.025%, kom tsis txhob impurity ntsiab ua rau kev ruaj ntseg ntawm cov qauv nplej. Lub elastic bar ua los ntawm cov khoom siv optimized tuaj yeem tswj tau 1000-teev kev ntxhov siab so tus nqi qis dua 3%, uas yog qis dua 10% ntawm cov ntaub ntawv zoo tib yam.
Dab tsi yog cov txheej txheem kev kho cua sov tseem ceeb rau kev ntxhov siab so inhibition ntawm elastic tuav?
Cov txheej txheem kev kho cua sov tseem ceeb rau kev ntxhov siab txo qis inhibition ntawm elastic tuav yog siv peb lub sijhawm - txheej txheem ntawmquenching + nruab nrab -kub tempering + stabilization khokom precisely tswj lub microstructure. Cov txheej txheem quenching txais cov roj quenching: ua kom sov lub elastic bar rau 860-880 degree, ua kom sov li 30-40 feeb, siab austenitize cov khoom thiab ces txias nws sai sai kom tau ib tug uniform martensite qauv. Lub hardness tom qab quenching yuav tsum ncav cuag HRC58-62, nteg lub hauv paus rau anti{16}} so kev ua tau zoo. Cov txheej txheem nruab nrab-kub tempering ua kom sov lub elastic bar rau 420-440 degree, ua kom sov li 2-3 teev, thiab hloov cov qauv martensite rau hauv tempered troostite, uas muaj ob qho tib si siab zog thiab siab tawv thiab tuaj yeem tiv taus kev ntxhov siab. Kev kub siab dhau heev yuav txo qis hardness, thaum kub qis heev yuav ua rau tsis txaus toughness thiab brittle puas. Kev kho kom ruaj khov yog cov kauj ruam tseem ceeb los tiv thaiv kev ntxhov siab: ua kom sov lub elastic bar mus rau 150-180 degree, ua kom sov li 10-12 teev, simulate lub xeev kev ntxhov siab ntawm kev pabcuam mus sij hawm ntev, txhawb kev tso tawm ntxov ntawm kev ntxhov siab sab hauv, thiab txo cov kev ntxhov siab thaum lub sijhawm ua haujlwm. Lub elastic bar kho los ntawm peb-theem kev kho cua sov tuaj yeem txhim kho qhov kev ua haujlwm ntawm kev so kom txaus los ntawm ntau dua 50% thiab tuav lub zog clamping ruaj khov rau lub sijhawm ntev.
Dab tsi yog qhov sib txawv ntawm kev tiv thaiv - so kev ua haujlwm ntawm elastic tuav rau ntau hom kab?
Cov kev cai sib txawv ntawm kev tiv thaiv - so kev ua tau zoo ntawm elastic bars rau ntau hom kab yog txiav txim siab raws li peb qhov tseem ceeb qhia:Txhua xyoo tag nrho dhau qhov hnyav, kev khiav hauj lwm ceev thiab ambient kub. High- kev tsheb ciav hlau ceev muaj lub tsheb ciav hlau khiav ceev ceev thiab muaj kev vibration siab, yog li lawv muaj qhov xav tau siab tshaj plaws rau kev tiv thaiv - so kev ua haujlwm ntawm elastic tuav: 10- xyoo kev ntxhov siab so tus nqi tsawg dua lossis sib npaug li 5%, thiab lub zog clamping attenuation Tsawg dua lossis sib npaug li 10%. Elastic tuav ua los ntawm 60Si2CrVA cov khoom thiab kho nrog stabilization yuav tsum tau siv los hloov mus rau ib puag ncig kev pab cuam ntawm siab{11}} zaus vibration. Hnyav-haul railways muaj lub tsheb ciav hlau loj thauj khoom thiab siab clamping quab yuam xav tau: 15- xyoo kev ntxhov siab txo qis dua lossis sib npaug li 8%, thiab lub zog clamping attenuation Tsawg dua lossis sib npaug li 15%. Qhov pib clamping quab yuam ntawm elastic tuav yuav tsum siab tshaj los yog sib npaug rau 12kN, thiab cov khoom yuav ua tau 60Si2CrVA los yog 55SiCr los xyuas kom meej tias nws muaj peev xwm tiv taus hnyav - thauj khoom. Ordinary-speed railways muaj qhov hnyav tag nrho ib xyoos dhau los, yog li qhov yuav tsum tau ua rau kev tiv thaiv kev ua haujlwm ntawm elastic tuav yog qhov xoob: 20-xyoo kev ntxhov siab txo qis dua lossis sib npaug li 10%, thiab clamping quab yuam attenuation Tsawg dua lossis sib npaug li 20%. Elastic tuav ua los ntawm 60Si2Mn cov khoom tuaj yeem xaiv kom sib npaug ntawm kev ua haujlwm thiab kev lag luam. Cov kab hauv av ntawm txoj kev tsheb ciav hlau hauv nroog muaj qhov kub thiab txias tab sis nquag pib thiab nres thiab ntau lub sijhawm vibration: 15-xyoo kev ntxhov siab txo qis dua lossis sib npaug li 7%. Elastic tuav kho nrog stabilization yuav tsum tau siv kom tsis txhob muaj kev so nrawm los ntawm kev co nquag.
Dab tsi yog cov txheej txheem tshawb nrhiav thiab cov qauv kev lees paub rau kev ntxhov siab so kev ua haujlwm ntawm elastic tuav?
Txoj kev tshawb nrhiav rau kev ntxhov siab so kev ua haujlwm ntawm elastic tuav tsuas yog siv akev nyuaj siab so kuaj tshuabraws li GB/T 10120-2013, thiab cov qauv kev lees paub yuav tsum ua raws li TB/T 3013-2015 cov qauv tshwj xeeb rau kev tsheb ciav hlau elastic bar. Thaum kuaj pom, teeb tsa lub elastic bar rau ntawm qhov tshwj xeeb fixture, siv lub zog tas li sib npaug rau qhov pib clamping quab yuam, teeb qhov ntsuas kub rau 120℃(ua kom kub ceev), ntsuas rau 1000 teev, sau cov nqi kev ntxhov siab ntawm lub sijhawm sib txawv, thiab suav cov kev ntxhov siab so. Txoj kev lees paub tau teev tseg tias 1000-teev kev ntxhov siab ntawm kev so ntawm elastic bars rau siab- kev tsheb ciav hlau ceev Tsawg dua lossis sib npaug li 3%, rau cov tsheb ciav hlau hnyav tsawg dua lossis sib npaug li 5%, thiab rau cov kev tsheb ciav hlau zoo tib yam tsawg dua lossis sib npaug li 8%. Nyob rau tib lub sijhawm, qhov ntsuas kub ib txwm clamping quab yuam yuav tsum tau ua: thawj zaug clamping quab yuam ntawm lub elastic bar yuav tsum ncav cuag 100% -110% ntawm tus nqi tsim, thiab tom qab 1000-teev kev xeem so, lub clamping quab yuam tuav yuav tsum siab tshaj los yog sib npaug rau 90%. Qhov piv piv rau kev kuaj pom yog 10 elastic bars ib batch. Yog tias ib qho tsis tsim nyog, yuav tsum tau ua ob qhov piv txwv; yog tias nws tseem tsis tsim nyog, cov batch ntawm elastic tuav yuav raug txiav txim tias tsis tsim nyog. Tsis tas li ntawd, yuav tsum tau ua qhov kev sim ua kom qaug zog: tom qab 2 × 10⁷ vibrations, lub elastic bar yuav tsum tsis txhob tawg los yog deformation, thiab lub clamping quab yuam tuav yuav tsum siab tshaj los yog sib npaug rau 85%.