ứng dụng phần mềm comsol mô phỏng quá trình nung cảm ứng đến trạng thái bán lỏng của phôi hệ hợp kim

NGHIEN CUfU-TRAO Ddi

U'NG DUNG PHA N M£ M COMSO L M 6 PHdNG QUA TRJNH NUNG

C A M U'NG D^N TRANG THAI BA N L6N G CO A PHOI HE

HOP KIM NHOM TRONG CONG NGHE TAO HJNH THIXOFORMING

THE APPLICATION COMSOL SOFTWARE TO SIMULATE THE INDUCTION

HEATING PROCESS TO ALUMINIUM ALLOY'S SEMISOLID STATE IN

THIXOFORMING PROCESS

NguySn Vinh DyS Trinh VSn Quoc^ Luu Phwong Minh'

'Sd Khoa hpc va Cdng nghe TR Hd Chi Minh

^Trudng Dai hgc Su pham Ky thuat TP Ho Chi Minh

'Trudng Dai hgc Bach Khoa TPHd Chi Minh

Ky thudt Thixoformingyeu cdu gia nhiet phdi din trgng thdi bdn long truac khi tao hinh

sao cho nhiet do duac phdn bo dong deu trin todn bg thi tich cua vgt nung. Td chuc ti vi cua phoi

CO dgng cdu vd co ti le pha ran- long theo mong mudnphdn bd deu. Trong qud trinh nung, mgt sd

hien tuang vgt ly se ldm dnh huong den tinh chdt bdn long cua phdi. Trong nghiin cicu ndy, nhom

tdc gid su dung phuang phdp ly thuyet truyin nhiet, phuang phdp so kit hgp vai phuong phdp mo

phong bdng phdn mem comsol di xdc dinh chiin lugc nung din trgng thdi bdn long. Cdc kit qud

dat duac ldm ca sa toi uu qud trinh thuc nghiem vd tiet kiem thai gian kiem tra cheo cdc tinh todn

bang phuang phdp so, tir do di ldm tien de cho viec phdt triin cong nghi a mice do cong nghiep vd

tdi lieu tham khao cho viic ndng cao hieu qud phuc vu cho cdc nghien cim trong linh vuc nung cdm

ung noi chung vd tao hinh vgt lieu a trgng thdi bdn long noi rieng.

Tfr khoa: Ky thudt thixoforming, nung cdm img, phuang phdp so, phdn mem mo phong

comsol.

ABSTRACT

Thixoforming technique requires casting metal alloys when they are partial liquid and partial

solid before the material flow into the die cavity under pressure, the temperature distribution must

be uniform within the billet at the end of heating, in order to obtain a good microstrucre. In this

papers, the authors use theoretical heat transfer, numerical method and combine with the Comsol

software simulating method to confirm and suggest strategies for practical process aiming to save

re-inspecting time of the calculation process by numerical method. This is the basis to develop

technology at industrial level and create basic premises in raising the application effects for studies

of induction heating (in general) and thixoforming techique (in particular).

Keywords: Thixoforming technique, induction heating, numericalmethod; the Comsolsimulating

software. ^

ISSN 0866 - 7056

TAP CHf CO KHf VIET NAM, Sd 3 nam 2015

www.cokhivietnam.vn