Ua hauj lwm Hardening tus nqi ntawm Austenitic Stainless hlau: Qhov cuam tshuam rau kev txias txias - Kev Paub

Austenitic stainless hlau(301, 304, 316) ua hauj lwm- harden roughly 2 mus rau 4 npaug sai dua carbon steel, nrog ib tug strain-hardening exponent (n-tus nqi) ntawm li 0.40 mus rau 0.55 piv rau 0.15 mus rau 0.25 rau me steel.

Qhov siab n- tus nqi yog los ntawm FCC siv lead ua qauv qhov tsis tshua muaj zog ua txhaum lub zog, uas txwv tsis pub cuam tshuam hla- plam, ntxiv rau deformation-induced martensite (cov nyhuv TRIP) hauv qib metastable xws li 301.

Txias-formed 304 tuaj yeem nce los ntawm 520 MPa (75 ksi) UTS annealed rau 1,200-1,400 MPa (175-200 ksi) tag nrho nyuaj; 301 tag nrho nyuaj ncav cuag roughly 1,275 MPa (185 ksi) yam tsawg kawg nkaus UTS.

Lub siab n- tus nqi tsis yog kev lav phib xaub nkaus xwb: nws ncua lub caj dab hauv cheeb tsam thiab txhim kho txoj kev ncab, tab sis nws kuj nce kev sib sau ua ke, lub caij nplooj ntoos hlav rov qab, thiab cov cuab yeej hnav, yuav tsum tau ntau dua nias tonnage, loj dua tuag clearances, thiab interpass annealing.

n- tus nqi yog ntsuas rau ASTM E646; qib kev xaiv, npau taws (raws li ASTM A666), thiab cov txheej txheem tsim yuav tsum tau ua kom haum rau kev tsim ua haujlwm es tsis ua rau ib qib austenitic.

Ua hauj lwm hardening tus nqi - quantified los ntawm lub strain- hardening exponent n nyob rau hauv lub Hollomon equation σ=Kεⁿ - ntsuas ceev npaum li cas ib tug hlau txoj kev nyuaj siab nce li nws yog plastically deformed. Hauv annealed austenitic stainless hlau, n feem ntau ntog ntawm 0.40 thiab 0.55, kwv yees li ob npaug ntawm 0.15-0.25 ntau yam ntawm cov pa roj carbon thiab ferritic steels, uas yog vim li cas tib txoj kev ua haujlwm xav tau ntau cov xovxwm tonnage thiab ua kom muaj zog, nyuaj ua tiav hauv stainless dua li cov hlau me me.

Work Hardening Rate of Austenitic Stainless Steel

Qhov sib npaug Hollomon piav qhia txog qhov kev ntxhov siab tiag tiag - qhov tseeb strain nkhaus nyob rau hauv cov yas zoo li - cheeb tsam deformation ua ntej caj dab pib. K yog lub zog coefficient thiab n yog qhov strain- hardening exponent: qhov siab dua n yog, qhov ntau cov khoom tsis kam mus ntxiv deformation nce rau ib qho ntxiv ntawm strain. Vim tias n kuj sib npaug qhov tseeb ntawm qhov pib ntawm caj dab (los ntawm Considère cov qauv), qhov siab n- tus nqi yog qhov qhia ncaj qha ntawm ntau npaum li cas ib daim ntawv tuaj yeem ncav cuag lossis kos ua ntej nws pib nyias hauv zos thiab ua tsis tiav.

Rau ib tus neeg tsim khoom, tus lej no piav qhia ntau yam uas tau pom hauv khw hauv pem teb ib zaug: vim li cas cov ntawv stainless xav tau ntau dua tonnage dua li cov hlau me me rau tib lub khoov lossis kos, yog vim li cas qhov saum npoo ntawm qhov tsim stainless yog ntsuas hnyav dua li - tau txais daim ntawv, thiab yog vim li cas ib feem uas zoo li nruab nrab - kos tseem tuaj yeem ncav cuag tau zoo los ntawm kev ua haujlwm sib sib zog nqus.{2}

Austenitic stainless hlau ua haujlwm- hardens sai dua vim tias nws lub ntsej muag -centered cubic (FCC) lattice muaj lub zog qis qis heev, uas thaiv qhov cuam tshuam tus ntoo khaub lig- plam uas cia lwm cov hlau rov qab thiab muag muag thaum lub sij hawm deformation; qib metastable ntxiv cov txheej txheem thib ob, kev hloov pauv -induced plasticity (TRIP), qhov twg strain converts austenite mus rau hauv martensite thiab ua rau ntxiv hardening nyob rau sab saum toj ntawm dislocation ntxiv dag zog rau.

Stacking txhaum lub zog (SFE) tswj qhov yooj yim dislocations tuaj yeem rov kho lawv tus kheej thaum lub sij hawm deformation. Nyob rau hauv austenitic stainless hlau, SFE qis ua rau dislocations faib mus rau hauv ib nrab dislocations uas tsis yooj yim hla- plam mus rau lub dav hlau tshiab. Tsis txhob rhuav tshem lossis rov kho dua rau hauv qis dua - kev teeb tsa hluav taws xob, kev tsis sib haum xeeb hauv pawg thiab tangle, thiab cov khoom tsis kam mus ntxiv ntws nce siab nrog kev sib zog. Ferritic thiab carbon steels muaj lub cev -centered cubic (BCC) lattice nrog SFE siab dua, yog li dislocations rov qab tau yooj yim dua thiab hardening tus nqi qis dua.

Metastable austenitic qib - qhov tseem ceeb tshaj plaws yog 301 - ntxiv cov nyhuv TRIP. Raws li cov khoom deforms, qee qhov austenite (FCC, nonmagnetic) hloov mus rau hauv martensite (lub cev -centered tetragonal, sib nqus thiab ntau nyuaj). Qhov kev hloov pauv no absorbs lub zog thiab qhia txog lub zog thib ob rau hauv cov khoom siv hluav taws xob, uas yog vim li cas 301 tshwj xeeb tuaj yeem ua tiav lub zog siab heev los ntawm kev ua haujlwm txias, tsis muaj kev kho cua sov koom nrog. Cov qib duplex zaum nyob nruab nrab ntawm: vim hais tias kwv yees li ib nrab ntawm lawv cov qauv twb ferrite, lawv cov n- tus nqi feem ntau qis dua qib austenitic tag nrho, txawm hais tias cov austenite feem nyob rau hauv ib lub duplex microstructure tseem tuaj yeem tawv los ntawm tib lub TRIP -txog cov txheej txheem.

Comparative Strain{0}}Hardening Exponents los ntawm Tsev Neeg Steel

Tsev neeg hlau	Qib Tus Neeg Sawv Cev	Lattice	Hom n-tus nqi	Kev Tswjhwm Hardening Mechanism
Austenitic (metastable)	301	FCC → ib nrab BCT ntawm straining	0.40 – 0.55 (TUS QHIA-ua kom zoo dua)	Dislocation tangling + deformation -induced martensite
Austenitic (tuaj yeem)	304 / 316	FCC	0.40 – 0.55	Dislocation tangling; tsawg stacking txhaum lub zog
Duplex	2205	FCC + BCC (~ 50/50)	Kwv yees . 0.20 - 0.30, theem- nyob ntawm	Partitioned straining ntawm austenite thiab ferrite
Ferritic	430	BCC	Kwv yees li . 0.17 - 0.23 (li ib nrab ntawm austenitic)	Dislocation glide nrog yooj yim hla-slip/recovery
Martensitic	410	BCT (raws li cua sov{0}} kho)	Kwv yees . 0.10 - 0.15	Txwv ntxiv hardening; lub zog yog cua sov- kho tau tsav
Carbon steel (me me)	1018 / 1045	BCC	0.15 – 0.25	Pa dislocation ntxiv dag zog

n-cov txiaj ntsig tau muab tso ua ke los ntawm kev tshaj tawm tensile- cov ntaub ntawv xeem thiab cov ntaub ntawv zeb cov ntaub ntawv hauv qab ASTM E646 kev xeem. Qhov tseeb qhov tseem ceeb sib txawv nrog ntau yam kev sib txawv, kev taw qhia dov, ntsuas, thiab ua haujlwm txias ua ntej; kho cov no raws li kev tsim- theem kev npaj ntau yam, tsis muaj ntawv pov thawj cov khoom siv kho tshuab. Paub meej nrog daim ntawv qhia txog zeb xeem (MTR) rau ib qho kev kub thiab kub.

Hauv 301 thiab cov qib metastable zoo sib xws, kev ua haujlwm txias hauv qab cov khoom siv Md30 kub hloov qee cov austenite rau hauv magnetic martensite raws li kev tsim cov txheej txheem, uas yog vim li cas 301 ib feem uas pib tsis sib nqus thiab mos tuaj yeem ua tiav cov hlau nplaum sib nqus thiab muaj zog heev - tab sis thawb qhov kev hloov pauv mus deb dhau, nrawm dhau, hauv kev sib tw heev {4} kuj tuaj yeem cuam tshuam tau yooj yim. cov feem martensite tsis tswj.

How Does the TRIP Effect Change Work Hardening in Metastable Grades Like 301

Md30 txhais tau tias yog qhov kub thiab txias ntawm 30% qhov tseeb strain tsim 50% hloov mus rau martensite. Nws yog ib qho muaj pes tsawg leeg- cov khoom uas tau tsav: qis nickel cov ntsiab lus thiab qis interstitial (carbon ntxiv rau nitrogen) cov ntsiab lus nce Md30, txhais tau tias cov khoom hloov pauv tau yooj yim dua ntawm chav tsev kub. Qhov no yog raws nraim qhov tsim logic tom qab 301 txheeb ze rau 304 - 301 nqa tsawg nickel tshwj xeeb yog li nws yuav ua haujlwm- tawv thiab nce lub zog sai dua thaum lub caij txias txias, ntawm qee tus nqi rau kev tiv thaiv corrosion thiab tsim cov paj piv nrog 304.

Qhov kev cuam tshuam rau kev tsim kab yog ob npaug. Ua ntej, lub zog thiab hardness tsis yog cov khoom siv ruaj khov rau qib metastable txoj kev uas lawv yog rau cov cua sov- kho alloy - lawv yog ib qho kev ua haujlwm ntawm ntau npaum li cas, thiab qhov ntsuas kub npaum li cas, qhov tseeb pom, uas txhais tau hais tias cov txheej txheem rov ua dua (dawb tuav quab yuam, kos nrawm, tuag kub) yog ib feem ntawm cov lus qhia, tsis yog daim ntawv pov thawj zeb xwb. Thib ob, vim tias ncua kev pheej hmoo tawg hauv qhov sib sib zog nqus ntawm - cov khoom sib txuas nrog kev sib xyaw ntawm Md30 thiab (C + N) cov ntsiab lus, qib thiab cov cua sov nrog ntau dua Md30 xav tau kev saib xyuas ntau dua, kev tsim ntau theem, thiab kev tshuaj xyuas ze dua rau qhov chaw uas yuav pom cov kev ntxhov siab nyob hauv kev pabcuam.

Kev kos duab sib sib zog nqus thiab ntau-theem stamping raug cuam tshuam ntau tshaj plaws, vim tias lawv ua rau cov yas loj loj, sib sau ua ke rau hauv cov khoom txwv tsis pub tuag; yooj yim dabtsi yog khoov thiab yob txoj kev raug cuam tshuam tsawg dua, tab sis tseem yuav tsum tau loj khoov radii, siab zog, thiab springback nyiaj them tshaj qhov sib npaug carbon- steel ua haujlwm.

Sib sib zog nqus nqus thiab stamping

Vim tias qhov kev ntxhov siab ntws nce siab nrog kev nyuaj siab, punch load thiab blank - tuav quab yuam ob qho tib si nce raws li qhov kev kos tau mus, thiab qhov kev pheej hmoo ntawm kev sib cais nce mus rau lub vojvoog ntawm lub punch thiab lub kaum sab xis tuag qhov twg strain concentrates ua ntej. Multi-theem draws yog tus qauv mitigation: txo tus nqi sib piv coj mus rau ib theem, thiab ntxig ib txheej txheem (kev daws teeb meem) anneal ntawm cov theem kom rov qab ductility ua ntej qhov kev txo qis tom ntej, es tsis yog sim ua kom txo tau tag nrho hauv ib qho kev hla raws li tej zaum yuav ua tau hauv cov hlau me me.

Khoov thiab yob txoj kev

dabtsi yog khoov austenitic stainless yuav tsum muaj qhov tsawg kawg nkaus khoov vojvoog ntau dua li qub - ntsuas cov pa roj carbon steel kom tsis txhob nto tawg ntawm cov fiber ntau sab nraud, thiab nws ua rau lub caij nplooj ntoos hlav ntau dua vim tias cov elastic modulus rov qab los tom qab tshem tawm cuam tshuam nrog cov khoom uas twb muaj zog heev hauv qhov khoov cheeb tsam. Springback them nyiaj - overbending, los yog nce qhov kev siv khoov quab yuam - yog cov qauv kev coj ua thiab yuav tsum tau lees paub los ntawm kev sim lossis simulation es tsis yog xav tau los ntawm carbon- cov ntaub ntawv siv hlau.

Machining tom qab tsim

Ib qho kev cuam tshuam, feem ntau qhov kev kwv yees tsis txaus ntseeg tau tshwm sim nyob rau hauv cov khoom siv thib ob: txhua qhov txiav tawm nyias ua haujlwm - txheej tawv tawv ntawm qhov chaw, yog li lub teeb tom ntej los yog cuam tshuam txiav tuaj yeem caij saum cov khoom tawv tawv es tsis txhob txiav los ntawm nws, ua kom cov cuab yeej hnav. Cov ntaub ntawv machinability rau 304 piv rau qhov nruab nrab nruab nrab- carbon steel (1045) qhia txog tib yam n- tus nqi sib txawv uas tau hais los saum toj no thiab yog ib qho txiaj ntsig zoo rau cov khoom siv yuav coj li cas hauv ib qho kev rov ua haujlwm dua - deformation, sib sau ua ke.

Xaiv 301 thaum daim ntawv thov txhob txwm siv qhov txias txias- ua hauj lwm ntxiv zog - springs, clips, thiab structural txias-formed shapes - xaiv 304 raws li qhov dav -lub hom phiaj rau stampings thiab kos qhov chaw uas corrosion kuj thiab tsim margin teeb meem ntau tshaj qhov siab tshaj plaws txias {{7} chloride los yog 3 chloride ua hauj lwm raug nyob rau hauv kev pab cuam thiab tuaj yeem zam tau nws txoj haujlwm qis dua - cov lus teb nyuaj rau 301.
Yam ntxwv	301	304	316
kwv tij Md30 (kev hloov pauv nyiam)	Siab tshaj - qis tshaj Ni cov ntsiab lus	Nruab nrab	Lower - Ni thiab Mo stabilize austenite
Lub luag haujlwm tseem ceeb hauv kev ua kom txias	Lub zog tau txais los ntawm kev tswj xyuas kev ua haujlwm txias	General -lub hom phiaj stamped thiab kos qhov chaw	Corrosive{0}}kev pabcuam stampings, marine/chemical parts
Tswj temper standard	ASTM A666 (1/4H - tag nrho cov tempers nyuaj)	ASTM A240 (phaj / ntawv), A666 rau tempered sawb	ASTM A240 (phaj / ntawv), A666 rau tempered sawb
Kwv yees li. puv - nyuaj yam tsawg kawg nkaus UTS	Txog 1,275 MPa (185 ksi)	Tsis feem ntau muab tag nrho nyuaj rau kev tsim qauv	Tsis feem ntau muab tag nrho nyuaj rau kev tsim qauv
Sib nqus teb tom qab hnyav sib sau	Muaj zog sib nqus (tseem ceeb martensite)	Sib nqus me ntsis hauv thaj chaw ua haujlwm hnyav tshaj plaws	Tsawg sib nqus ntawm peb - Mo thiab Ni suppress transformation
Qhov zoo tshaj plaws - haum kev ua haujlwm	Pwm txoj kev, yob txoj kev, caij nplooj ntoos hlav stamping; tsis zoo tagnrho rau kev sib sib zog nqus nqus ntawm puv -mob siab	Sib sib zog nqus daim duab, dav stamping, spinning	Sib sib zog nqus nqus thiab stamping qhov twg corrosion kuj yog qhov kev txiav txim siab

Muab tso ua ke los ntawm ASTM A240 / A666 cov ntaub ntawv tshwj xeeb thiab luam tawm cov ntaub ntawv xov xwm zeb rau kev ua kom sov thiab txias - dov tempers. Txheeb xyuas qhov tseeb ntawm cov khoom siv kho tshuab thiab kev kub ntxhov tawm tsam cov ntawv qhia zeb tshwj xeeb ua ntej ua tiav cov cuab yeej tsim.

Ua kom muaj ntau theem thiab txo qis hauv ib theem, loj dua tuag thiab punch clearances dua carbon- steel xyaum, hnav-resistant los yog coated tooling, chloride-dawb lubrication, thiab ib tug npaj txheej txheem anneal ntawm kos theem es tsis txhob sim quab yuam ib tug carbon- steel txheej txheem daim ntawv qhia mus rau ib tug stainless.

Ua kom tuag thiab punch tshem tawm txheeb ze rau cov pa roj carbon- cov cuab yeej siv hlau kom haum rau kev ntxhov siab ntau dua thiab txo qis qis; lees paub qhov tshwj xeeb clearance los ntawm kev sim rau qib, temper, thiab gauge siv.

Siv qhov khoov loj thiab punch radii dua li cov pa roj carbon - steel sib npaug kom tsis txhob sab nrauv - fiber ntau tawg vim cov khoom siv ductility yog siv los ntawm kev ua haujlwm txias.

Txo qhov sib piv ntawm kos ib theem hauv kev sib sib zog nqus nqus, thiab ntxig cov txheej txheem (kev daws teeb meem) anneal - feem ntau nyob rau hauv 1,010-1,100℃ntau yam nrog cua txias ceev rau cov qib austenitic - nruab nrab ntawm theem kom rov qab ductility ua ntej qhov kev txo qis tom ntej.

Qhia meej hnav- cov cuab yeej tiv taus hlau (xws li D2 lossis M2) lossis coated tuag, txij li tib lub siab n- tus nqi uas ntxiv dag zog rau qhov tseem ua rau cov cuab yeej siv abrasive.

Siv cov tshuaj chloride- cov roj nplua nyeem dawb; residual chlorides daig nyob rau hauv ib tug tsim stainless ib feem nyob rau hauv tensile residual kev nyuaj siab yog ib tug paub txog kev ntxhov siab -corrosion- cracking txaus ntshai.

Siv tau lub caij nplooj ntoos hlav rov qab nrog rau qhov chaw sim lossis tsim kev simulation es tsis yog cov pa roj carbon- cov cuab yeej steel offsets, thiab tsim nyob rau hauv overbend lossis nce khoov quab yuam raws li xav tau.

Rau cov qib metastable khiav nyob ze lawv Md30 qhov kub thiab txias, tswj qhov nrawm nrawm thiab qhov kub thiab txias, txij li cov seem martensite - thiab yog li qhov kawg ntawm lub zog, ductility, thiab kev pheej hmoo tawg - yog txheej txheem - nyob ntawm, tsis kho los ntawm daim ntawv pov thawj zeb ib leeg.

ASTM E646 yog tus qauv tensile-txoj kev sim siv los txiav txim siab qhov strain- hardening exponent (n) thiab lub zog coefficient (K), thiab nws yuav tsum tau teev tseg nrog rau cov qauv siv tau - ASTM A240 rau phaj thiab ntawv, lossis ASTM A666 rau txias - dov{7} tus cwj pwm hnyav thaum ua haujlwm tsim kev ua haujlwm.

ASTM E646 txhais li cas tus n- tus nqi yog xam los ntawm qhov tseeb kev nyuaj siab- qhov tseeb strain nkhaus nyob rau hauv ib tug tshwj xeeb cov yas- hom kab mob, uas yog ib qho tseem ceeb vim hais tias n tsis yog ib tug tas tas mus li rau ib yam khoom - nws muaj peev xwm sib txawv me ntsis nrog rau lub sij hawm strain siv, ntsuas kub, thiab cov ntawv qhia. Thaum tus cwj pwm ua haujlwm hnyav yog ib qho kev tsim qauv tseem ceeb, tsis yog qhov kev cia siab dav dav, qhia meej E646 qhov kev xeem ntau yam ntawm kev yuav khoom nrog rau cov khoom siv hauv paus thiab tus qauv temper, thiab thov cov ntaub ntawv ntsuas tiag tiag ntawm daim ntawv tshaj tawm zeb xeem (MTR) es tsis yog tso siab rau cov ntawv tshaj tawm ib leeg.

Q: Puas yog ib qho kev ua haujlwm siab dua txhais tau tias austenitic stainless hlau nyuaj rau daim ntawv txias dua li carbon steel?

A: Tsis tas li. Tib qhov siab n- tus nqi uas nce kev tsim khoom kuj tseem ncua qhov pib ntawm lub caj dab hauv zos, uas yog vim li cas austenitic stainless hlau feem ntau tuaj yeem ncab lossis kos ntxiv dua li cov hlau ua ntej nws sib cais. Kev lag luam tawm -tawm yog qhov xav tau ntau dua cov xovxwm tonnage, ntau lub caij nplooj ntoos hlav rov qab, thiab cov cuab yeej siv nrawm dua, tsis yog qhov qis dua.

Q: Vim li cas 301 stainless hlau ua hlau nplaum tom qab tsim thaum nws pib tawm nonmagnetic?

A: Kev ua haujlwm txias hauv qab lub alloy qhov kub Md30 hloov ib feem ntawm nonmagnetic FCC austenite rau hauv lub cev sib nqus -centered-tetragonal martensite. Qhov kev hloov pauv no -induced plasticity (TRIP effect) yog txhob txwm ua hauv 301 thiab yog qhov laj thawj tseem ceeb uas nws tuaj yeem ncav cuag lub zog siab heev los ntawm kev ua haujlwm txias ib leeg.

Q: Tus qauv xeem twg ntsuas qhov strain- hardening exponent (n-value)?

A: ASTM E646 yog tus qauv ntsuas tus qauv rau kev txiav txim siab qhov strain- hardening exponent thiab lub zog coefficient los ntawm kev ntsuas tensile. Nws yuav tsum tau teev nyob rau hauv cov txheej txheem ntawm cov khoom siv hauv paus (ASTM A240 rau phaj thiab ntawv, lossis ASTM A666 rau txias-rolled strip) thaum n- tus nqi yog qhov tseem ceeb ntawm kev tsim cov tswv yim.

Q: Can annealing restore ductility rau stainless hlau tom qab txias sib sau?

A: Yog. Cov txheej txheem (kev daws teeb meem) anneal, feem ntau nyob rau hauv 1,010-1,100℃ntau yam ua raws li kev ua kom txias sai rau cov qib austenitic, dissolves carbides thiab rov kho cov qauv FCC austenite, rov kho cov ductility ua ntej cov txheej txheem tom ntej.

Q: Puas yog duplex stainless hlau ua haujlwm ntau dua lossis tsawg dua - hardenable dua austenitic qib zoo li 304?

A: Feem ntau tsawg, hauv cov ntsiab lus ntau. Vim hais tias kwv yees li ib nrab ntawm cov duplex microstructure yog ferrite, uas ua hauj lwm - hardens qeeb qeeb tshaj austenite, tag nrho n- tus nqi ntawm ib qib duplex feem ntau qis dua qib austenitic tag nrho, txawm tias cov feem austenite nyob rau hauv cov qauv duplex tseem tuaj yeem ua rau TRIP related {{3}.

Q: Qib twg austenitic yog qhov kev xaiv ua ntej thaum ua haujlwm hnyav tsis yog qhov kev txiav txim siab?

A: 304 yog qhov dav dav - lub hom phiaj ua haujlwm rau stampings thiab kos qhov chaw. Mus txog rau 301 tshwj xeeb yog thaum tus qauv tsim los siv cov khaub thuas- ua haujlwm ntxiv, thiab qhia 316 thaum muaj tshuaj chloride lossis tshuaj lom neeg hauv kev pabcuam ntau dua qhov kev txiav txim siab tsim.

Ua haujlwm hardening tus nqi tsis yog ib qho kev mob tshwm sim los tsim ib puag ncig hauv austenitic stainless hlau txias sib sau ua - nws yog cov khoom tseem ceeb uas yuav tsum tau tsav cov qib kev xaiv, xaiv temper, thiab cov cuab yeej tsim los ntawm qhov pib. A strain- hardening exponent ntawm 0.40 mus rau 0.55, tsav los ntawm tsawg stacking txhaum lub zog thiab, nyob rau hauv cov qib metastable, cov nyhuv TRIP, muab cov qib austenitic ob qho tib si ib qho zoo (ua hauj lwm rau lub hauv paus caj dab) thiab cov txheej txheem yuav tsum tau (ntau dua tonnage, loj clearances, interfferne steel kev xyaum.

Sib piv qib, npau taws, thiab cov txheej txheem rau kev ua haujlwm tshwj xeeb - es tsis yog ua rau ib qib lossis cov pa roj carbon - cov txheej txheem steel - yog qhov sib txawv ntawm ib feem uas ua kom huv si thiab ib qho uas sib cais, wrinkles, lossis ua tsis tiav hauv kev pabcuam.

Ua Haujlwm Hardening Rate ntawm Austenitic Stainless Steel: Qhov cuam tshuam rau kev sib sau txias

Dab tsi yog Qhov Ua Haujlwm Hardening Rate, thiab Vim Li Cas Nws Thiaj Tswj Txias - Ua Tus Cwj Pwm Hauv Austenitic Stainless Steel?

Vim li cas Austenitic Qib Ua Haujlwm-Harden sai dua Ferritic, Duplex, thiab Carbon Steel?

Yuav ua li cas TRIP Effect Hloov Ua Haujlwm Hardening hauv Metastable Qib Zoo li 301?

Dab tsi txias -Kev tsim cov txheej txheem feem ntau cuam tshuam los ntawm Kev Ua Haujlwm Siab Ua Haujlwm?

301 vs. 304 vs. 316: Qib twg Koj Yuav Tsum Xaiv Qhov Txias -Tsev Daim Ntawv Thov?

Yuav Ua Li Cas Them Nyiaj Rau Kev Ua Haujlwm Siab Ua Haujlwm Zoo Tshaj Plaws hauv Tooling thiab Txheej Txheem Tsim?

Cov txheej txheem xeem twg thiab cov qauv ntsuas ntsuas qhov ua haujlwm nyuaj rau kev yuav khoom thiab kev tswj xyuas zoo?

Cov lus nug nquag

Cov ntsiab lus