Kev soj ntsuam ntawm Rolling Temperature Ntawm Microstructure Thiab Cov Khoom Ntawm Titanium Forgings

Qhov zoo ntawmtitanium forgings ncaj qha txiav txim siab lawv cov kev pabcuam kev ntseeg. Raws li cov txheej txheem tseem ceeb hauv cov txheej txheem ua haujlwm kub, dov kub ua rau muaj kev cuam tshuam rau cov khoom siv hluav taws xob kawg ntawm cov khoom los ntawm kev tswj cov theem kev hloov pauv tus cwj pwm thiab microstructural evolution hauv cov forgings.

 

 

Cov qauv siv lead ua ntawm titanium alloys hloov nrog qhov kub thiab txias, nrog rau / theem hloov pauv qhov tseem ceeb (885 ~ 900℃rau kev lag luam ntshiab titanium thiab 980 ~ 1010℃rau Gr5 alloy). Raws li qhov no, dov tau muab faib ua peb pawg: theem cheeb tsam, + theem cheeb tsam, thiab cheeb tsam tseem ceeb, nrog rau qhov sib txawv loj hauv microstructural evolution thiab cov khoom.

 

1. β Phase Zone Rolling (>Theem Transformation Point)

Lub billet muaj lub cev -centered cubic (BCC) theem, featuring tsawg deformation kuj thiab zoo yas, ua rau nws haum rau loj - deformation ua. Ingots tuaj yeem dhau 70% ~ 80% loj deformation kom tawg cov nplej ntxhib thiab tsim cov qauv fibrous. Txawm li cas los xij, acicular martensite yog nquag tsim tom qab txias, ua rau muaj qhov tsis sib xws ntawm lub zog, plasticity, thiab toughness, uas yuav tsum tau kho kom zoo dua tom qab cua sov.

 

2. + Phase Zone Rolling (< Phase Transformation Point)

Qhov no yog qhov tseem ceeb dov lub sijhawm rau kev ua tiav forgings, feem ntau tswj ntawm 30 ~ 50℃hauv qab ntawm theem hloov pauv (xws li, 950 ~ 800℃rau Gr5 tuag forging). Cov khoom muaj ob theem ntawm hexagonal ze- ntim (HCP) theem thiab BCC theem. Deformation yog nrog los ntawm grain fragmentation thiab theem refinement / spheroidization, enabling lub tsim ntawm ib tug zoo tagnrho qauv ntawm equiaxed theem + lamellar -transformed theem, uas balances lub zog thiab plasticity.

 

3. Critical Zone Rolling (Nyob ze Phase Transformation Point)

Cov qauv sib xyaw thiab tsis sib xws, ua rau muaj kev cuam tshuam - mus rau - hloov pauv cov khoom sib txawv. Nws tsis pom zoo yam tsis muaj qhov tshwj xeeb.

 

 

 

 

1. Theem Zone Rolling

Acicular martensite cov ntaub ntawv tom qab txias, ua rau lub zog siab tab sis tsis tshua muaj plasticity thiab toughness. Kev deformation tsis txaus nyiam khaws cov ciam teb qub qub thiab tsim cov kab lis kev cai txuas ntxiv, txo cov tawv tawv, ua rau muaj kev ntxhov siab, thiab cuam tshuam rau kev pabcuam kev nyab xeeb.

 

2. + Phase Zone Rolling

Qhov no yog qhov kev xaiv zoo tshaj plaws rau kev ntsuas lub zog thiab plasticity. Kev tswj qhov ntsuas kub tsim nyog tuaj yeem ua kom cov nplej zoo dua thiab ua kom zoo rau theem muaj pes tsawg leeg los txhim kho cov khoom.

 

3. Cov khoom sib xws

Loj- qhov loj me forgings muaj qhov sib txawv ntawm qhov chaw -cov qauv / cov khoom zoo vim qhov kub thiab txias gradients. Optimizing kub systems (xws li, multi-dav dov) tuaj yeem txhim kho qhov no.

 

 

1. -Type thiab ze- -Type Titanium Alloys

Ingot kev puas tsuaj yuav tsum muaj qhov kub siab ntawm thaj tsam (1180 ~ 900 degree) kom txo qis deformation tsis kam thiab txhim kho cov khoom tsim tau. Preforming thiab tuag forging yuav tsum tau txo mus rau + theem cheeb tsam kom ntseeg tau zoo microstructural zog. Cov alloys no yog cov rhiab heev rau dov kub; Kev kub siab heev yooj yim ua rau cov qoob loo loj hlob, thaum qhov kub tsis tshua muaj siab ua rau deformation tsis kam thiab ua rau tawg.

 

2. + -Type Titanium Alloys (piv txwv li, Gr5)

Raws li hom siv dav tshaj plaws, lawv muaj qhov dav dav ntawm qhov kub thiab txias, tab sis tiav forgings yuav tsum tau tswj nruj me ntsis hauv thaj tsam + theem. Siv Gr5 ua piv txwv, qhov ntsuas kub ntawm qhov sib tsoo yog 1200 ~ 850℃(theem cheeb tsam), qhov ntsuas kub ua ntej yog 1000 ~ 800℃(+ theem cheeb tsam ze rau theem kev hloov pauv), thiab qhov kub ntawm qhov tuag forging yog 950 ~ 800℃(xeem + theem cheeb tsam). Los ntawm ntau- theem tswj qhov kub thiab txias, ob qho tib si kev ua tau zoo thiab cov khoom ua tau zoo sib npaug.

 

3. Nyob ze - -Hom Titanium Alloys

Cov alloys no muaj qhov hloov pauv qis qis thiab tuaj yeem dov tau ntau qhov kub thiab txias, tab sis qhov kub siab heev uas ua rau cov qoob loo ntau dhau yuav tsum zam. Lawv feem ntau yog dov hauv thaj tsam + theem kom tau txais cov qauv ntsuas lub zog thiab tawv.

 

 

1. Muaj tseeb Localization ntawm Theem Transformation Kub

Txiav txim siab qhov / theem hloov pauv ntawm cov alloys tshwj xeeb los ntawm kev sim thermal expansion lossis metallographic tsom xam los faib cov theem cheeb tsam thiab + theem cheeb tsam, zam kev tsis xws luag microstructural los ntawm kev txiav txim siab ntawm lub sijhawm.

 

2. Xaiv Rolling Intervals raws li xav tau

Ua ntej loj-deformation dov nyob rau hauv theem cheeb tsam rau ingot tawg los txhim kho tus qauv qub, thiab ua ntej lub + theem cheeb tsam rau tiav forgings kom sib npaug zog thiab plasticity. Rau forgings xav tau siab toughness, dov kub nyob rau hauv lub cheeb tsam + theem yuav raug txo kom tsim nyog rau refine nplej.

 

3. Optimize Temperature Gradient Control

Txais yuav "tsawg-kub ceev dov" lossis "ntau- dhau rolling" rau loj-sized forgings kom txo tau qhov saum npoo- qhov kub thiab txias sib txawv thiab txhim kho cov khoom sib xws.

 

4. Sib koom ua ke nrog kev kho cua sov tom ntej

Anneal tom qab theem cheeb tsam dov los kho cov qauv acicular, thiab ua cov tshuaj laus tom qab + theem zone dov los txhim kho lub zog ntxiv.

 

Ruihang yog lub chaw tsim khoom ntawm titanium thiab titanium alloy khoom, muab siab - zoo titanium alloy forgings. Yog xav paub ntxiv, thov hu rau peb ntawm Email:Sam.Rui@bjrh-titanium.com