Hardness Range ntawm Monel Alloy & Qhov cuam tshuam ntawm Kev Ua Haujlwm Txawv Tebchaws (Annealed vs. Txias-rolled)
1. Hardness Range ntawm Monel Alloy
Monel 400
Nws yog ib qho khoom siv -kev daws teeb meem npib tsib xee- tooj liab alloy, thiab nws qhov hardness yog nyob ntawm kev ua haujlwm:
Annealed xeev: Brinell Hardness (HB) yog65–95, Rockwell B Hardness (HRB) yog50–70. Nyob rau hauv lub xeev no, cov alloy muaj qhov qis tshaj hardness, pom ductility thiab toughness, ua rau nws haum rau sib sib zog nqus nqus, dabtsi yog khoov thiab lwm yam txheej txheem.
Txias-rolled xeev: Nrog rau qhov nce ntawm kev ua haujlwm txias deformation (piv txwv li, 20%, 40%, 60% deformation), hardness nce siab. Thaum txias deformation mus txog 50-60%, Brinell Hardness (HB) tuaj yeem ncav cuag180–220, thiab Rockwell B Hardness (HRB) tuaj yeem ncav cuag90–100.
Kev daws teeb meem- kho lub xeev: Zoo ib yam li lub xeev annealed, nrog Brinell Hardness (HB) ncig70–90, uas yog siv los kho cov hlau ductility tom qab ua haujlwm txias.
Monel K-500
Nws yog ib qho nag lossis daus- hardened variant ntawm Monel 400, uas tuaj yeem ua tiav cov tawv tawv dua los ntawm kev kho kev laus:
Annealed xeev: Brinell Hardness (HB) yog80–100, Rockwell B Hardness (HRB) yog60–80, me ntsis siab dua annealed Monel 400 vim nws cov khoom siv hauv cov khoom siv hlau.
Lub xeev laus: Tom qab kev kho kev daws teeb meem + kev laus kev kho mob (feem ntau cua sov rau 480-510℃thiab tuav rau 4-6 teev), cov alloy precipitates nplua Ni₃ (Al, Ti) ntxiv dag zog rau theem. Lub sijhawm no, Brinell Hardness (HB) tuaj yeem ncav cuag240–280, thiab Rockwell C Hardness (HRC) tuaj yeem ncav cuag25–35, uas yog siab dua Monel 400.
Txias- dov + laus lub xeev: Kev sib xyaw ua haujlwm txias thiab kev laus kev kho mob tuaj yeem txhim kho hardness ntxiv, nrog Brinell Hardness (HB) mus txog280–320thiab Rockwell C Hardness (HRC) mus txog30–40.
2. Kev cuam tshuam ntawm txawv teb chaws ua haujlwm (Annealed vs. Txias-rolled) ntawm Hardness
Annealing kev kho mob: Txo hardness, txhim kho ductility
Annealing yog txheej txheem kev kho cua sov uas suav nrog cua sov cov hlau rau qhov kub siab tshaj qhov kub ntawm cov khoom siv rov ua dua tshiab (feem ntau 870-920℃rau Monel alloy), tuav nws rau qee lub sijhawm, thiab tom qab ntawd txias nws maj mam.
Mechanism: Thaum lub sij hawm annealing, lub deformed nplej ntawm txias - ua hauj lwm alloy undergo recrystallization, tsim tshiab equiaxed nplej. Dislocations generated thaum lub sij hawm ua hauj lwm txias yog tshem tawm, thiab cov kev ntxhov siab nyob rau hauv lub alloy raug tso tawm.
Kev cuam tshuam rau hardness: Annealing ho txo cov hardness ntawm Monel alloy, kho nws mus rau qib qis tshaj ntawm cov alloy. Piv txwv li, txias- dov Monel 400 nrog HB 200 tuaj yeem raug txo mus rau HB 70–90 tom qab tag nrho annealing.
Daim ntawv thov scenario: Annealed Monel alloy yog tsim rau cov txheej txheem uas yuav tsum tau muaj siab formability, xws li stamping, forging, thiab vuam.
Kev kho mob khaub thuas dov: nce hardness, txo ductility
Txias dov yog hais txog dov cov hlau ntawm qhov kub hauv qab nws qhov kub thiab txias recrystallization (feem ntau yog chav tsev kub).
Mechanism: Txias dov ua rau cov yas deformation ntawm cov nplej nplej, ua rau dislocation multiplication thiab tangling, as well as grain elongation and refinement. Lub zog ntawm dislocations yog hindered, ua rauua hauj lwm hardeningntawm lub alloy.
Kev cuam tshuam rau hardness: Hardness nce linearly nrog qhov nce ntawm txias deformation. Thaum lub deformation me me (10-20%), hardness nce yog me me; Thaum lub deformation ntau tshaj 40%, lub hardness nce sharply. Piv txwv li, Monel 400 tuaj yeem ua tiav qhov hardness nce ntau dua 100% tom qab 60% txias dov.
Kev mob tshwm sim: Thaum txhim kho hardness, txias dov txo cov ductility ntawm alloy (xws li, elongation txo los ntawm 35-40% nyob rau hauv lub annealed lub xeev mus rau tsawg tshaj li 5% nyob rau hauv lub siab -deformation txias- dov lub xeev), ua rau nws nquag tawg thaum lub sij hawm tom ntej.
Summary ntawm qhov cuam tshuam degree
Lub xeev kev ua haujlwm yog ib qho ntawmyam tseem ceebcuam tshuam lub hardness ntawm Monel alloy. Rau Monel 400, lub hardness ntawm txias -rolled xeev yuav ua tau2-3 npaug siab duatshaj li ntawm lub xeev annealed. Rau Monel K-500, kev sib xyaw ua ke ntawm qhov txias dov thiab kev laus kev kho mob tuaj yeem ua kom muaj zog ntxiv qhov sib txawv hardness, ua rau lub hardness ntawm lub xeev muaj zog.3-4 npaug siab duatshaj li ntawm lub xeev annealed.
