Muaj kev tuav ruaj khov ntawm cov khoom siv hlau yuav pab koj txiav txim siab seb cov khoom twg yuav haum rau koj daim ntawv thov thaum koj mus yuav khoom fasteners xws li dowel pins.
Mechanical Properties of Metals: Ib Daim Ntawv Teev Npe
Qee qhov tseem ceeb tshaj plaws mechanical zog kom nkag siab yog:
Hardenability:Lub peev xwm ntawm cov hlau kom ncav cuag qhov xav tau hardness.
Machineability:Kev ntsuas los txiav txim siab seb cov hlau tuaj yeem txiav tau yooj yim npaum li cas.
Corrosion Resistance:Cov hlau muaj peev xwm tiv taus corrosive lossis deteriorating cov ntsiab lus lossis ib puag ncig.
Nyob rau hauv cov khoom no, ob peb lwm yam khoom yuav tsum tau to taub. Cov no suav nrog:
Tensile Stress:Ib hom kev ntxhov siab uas rub cov khoom nyob rau hauv qhov sib txawv.
Tensile zog:Qhov siab tshaj plaws ntawm tensile kev ntxhov siab ib yam khoom tuaj yeem tiv taus.
Elasticity:Cov hlau muaj peev xwm rov qab mus rau nws cov duab qub tom qab ntsib lub zog deforming.
Yas Deformation:Lub deformation mus tas li (tab sis tsis tawg) ntawm cov hlau.
Yield zog:Lub ntsiab lus ntawm cov hlau tus cwj pwm elastic muab txoj hauv kev rau cov yas deformation.
Shear Stress:Kev ntxhov siab ntawm lub zog uas tuaj yeem ua rau cov hlau tawg lossis hlais raws nws cov dav hlau.
Ductility:Ib qho kev ntsuas ntawm cov hlau muaj peev xwm ua rau cov yas deformation tsis tawg.
Toughness:Kev sib xyaw ua ke ntawm cov hlau ductility thiab tensile lub zog.
Cia peb ua tib zoo saib xyuas txhua yam ntawm cov khoom no kom nkag siab zoo dua li cas lawv ua haujlwm ua ke los piav qhia tus cwj pwm hlau.
Hardenability
Hardenabilityyog lub peev xwm ntawm cov hlau kom ncav cuag qhov xav tautawv- Kev ntsuas ntawm cov hlau tsis kam rau cov yas deformation, uas yog cuam tshuam los ntawm cov khoom siv lub zog tensile thiab elastic zog. Txhawm rau txiav txim siab seb cov hlau puas tuaj yeem ua rau qhov xav tau, nws yog ib qho tseem ceeb kom nkag siab tias hardness ntsuas li cas.
Hardness
Txhawm rau kom ua tiav hardness, cov hlau yuav tsum tau ua kom sov mus rau theem austenitic, uas yog qhov kub-kub khoom theem uas atoms rearrange, thiab ces txias sai sai rau lub martensitic theem, uas yog ib tug hardened xeev ntawm hlau uas tsim thaum lub austenitic steel txias. sai heev rau cov atoms rov qab mus rau lawv qhov qub configuration. Kev xaiv cov kev kho cua sov hu ua tempering ua rau cov hlau hardness hloov mus rau ntau qib.
Lub hardness ntawm cov hlau tuaj yeem ntsuas nrog ntau yam kev xeem, nrog rau cov kev sim ntau tshaj plaws yog Rockwell, Brinell, Vickers, thiab Knoop tests. Txhua qhov kev ntsuam xyuas tau tshwm sim raws li tus lej ua raws li cov ntawv xeem, txawm hais tias qee qhov kev sim ntxiv lwm cov khoom rau qhov kawg tshwm sim, xws li cov nqi siv zog, tus sawv cev ntawm cov khoom siv, thiab lub sijhawm dhau mus thaum lub sijhawm xeem. Rau txhua qhov kev sim, tus lej qis dua piv rau cov ntaub ntawv softer, thaum cov lej siab dua sawv cev cov ntaub ntawv nyuaj.
Machineability
Machinability yog ib qho khoom siv hlau ncaj ncees uas qhia txog qib uas cov hlau tuaj yeem txiav tau yooj yim. Nws tsis tuaj yeem ntsuas raws nraim (tsis zoo li hardness) vim tias sab nraud cuam tshuam rau tus yam ntxwv no. Cov kev hloov pauv no suav nrog cov khoom siv hlau txiav, qhov kub thiab txias ntawm cov khoom siv thiab cov cua nyob ib puag ncig, kev siv cov dej txiav, qhov ceev ntawm kev txiav, thiab lwm yam.
Tab sis AISI tau pom tias yuav tsum muaj lub moj khaum uas yuav ua lub hauv paus rau kev txiav txim siab machinability. Qhov no tau coj mus rau kev tsim ntawm Machinability Index, uas siv cov qauv qauv los ntsuas qhov machinability ntawm ntau yam hlau.
Machinability Ratings
Cov txheej txheem koom nrog kev sib piv cov machinability ntawm txhua cov hlau rau ntawm B1112 txias drawn steel, uas tau muab rau Machinability Rating (MR) ntawm 1 thiab tau txais kev pab raws li tus qauv hlau. AISI tau tshuaj xyuas ntau yam hlau tiv thaiv qhov ceev ntawm B1112 tuaj yeem txiav nrog lub cuab yeej tshwj xeeb txhawm rau muab qhov ntsuas.
Qhov tshwm sim MR rau txhua cov hlau yog qhia raws li feem pua, nrog B1112 tau txais 100%. Yog tias cov qhab nias hlau qis dua 100%, nws nyuaj rau tshuab dua B1112. Yog tias nws tau qhab nia siab dua 100%, nws yooj yim dua rau tshuab. Piv txwv li, 1095 carbon steel muaj MR ntawm ib ncig ntawm 45% vim nws cov ntsiab lus carbon. Aluminium 6061, ntawm qhov tod tes, muaj MR ze rau 270%.
Corrosion Resistance
Corrosionyog thaum hlau deteriorates thiab poob ceev vim nws tsis tuaj yeem tiv thaiv kev cuam tshuam ntawm nws tus kheej thiab ib puag ncig sab nraud.Corrosion kujyog cov hlau muaj peev xwm tiv thaiv qhov kev sib cuam tshuam, feem ntau yog vim nws cov pleev xim hlau, cov txheej tiv thaiv, lossis ob qho tib si.
Oxygen, kua, kub, huab cua, tshuaj, hluav taws xob tam sim no, av, thiab khib nyiab yog lwm yam txawv txav uas cuam tshuam rau corrosion. Txhua yam ntawm cov khoom no muaj peev xwm ua tau raws li cov channel rau lwm qhov chaw, uas yuav ua rau muaj kev cuam tshuam ntau dua. Cov hlau ib puag ncig kuj yuav muaj kev cuam tshuam rau kev ua haujlwm corrosion; Piv txwv li, ib qho hlau rau hauv dej hiav txwv yuav tsis tiv taus corrosion li ib qho uas tawm sab nraud lossis khaws cia rau hauv cov nroj tsuag tshuaj. Txij li cov hlau sib txawv muaj ntau hom kev tiv thaiv, nws yog ib qho tseem ceeb kom nkag siab txog yam kev tiv thaiv corrosion uas hlau yuav tsum tau ua tiav hauv nws daim ntawv thov.
Ntau cov alloys nrov qhia tau zoo tiv thaiv corrosion nyob rau hauv ob qho tib si ambient thiab ntuj ib puag ncig:
· 300 series stainless hlau tsis corrosion resistant ntawm lawv tus kheej; lawv xav tau txheej txheej, passivation, lossis plating kom pom qhov tsis kam. Txawm li cas los xij, 316 paub txog nws qhov kev tiv thaiv corrosion hauv cov dej ntsev. 400 series stainless hlau pom zoo corrosion kuj rau me ntsis ntuj ntsiab.
· Lwm cov hlau uas muaj corrosion kuj zoo rau tej yam ntuj tso muaj xws li 360 thiab 464 tooj dag, uas ua hauj lwm zoo nyob rau hauv dej ntsev ib puag ncig.
· Cov txheej txheem tiav, platings, thiab coatings uas muab kev tiv thaiv corrosion muaj xws li tab sis tsis txwv rau xeb inhibitors, anodizing aluminium alloys, dub oxide, chromate conversion coatings, electroplating, zinc los yog manganese phosphate, xim phosphate, kub-dip aluminium, thiab zinc electroplating .
Lwm yam khoom los xav txog
Lwm yam khoom tseem ceeb uas sib txuas lus tus cwj pwm ntawm cov hlau muaj xws li shear stress, strain, thiab lub zog; ductility; thiab toughness.
Wenqi Machinery muaj ntau yam khoom siv hauv cov hlau sib txawv no uas tsim nyog rau ntau yam kev siv.Hu rau peb Pab Pawg Muag Khoomlos yogtshawb xyuas peb cov khoom lag luam kom paub ntau ntxiv.
