Xác định vùng giá trị hợp lý của các thông số công nghệ ảnh hưởng đến độ xốp lớp phủ bột cacsbua

NGHIEN CCrU - TRAO DOI

XAC DjNH VCiNG GIA TRj HOP LY CClA CAC THONG S6 C6N G

NGHE ANH HU'd'NG D^N DO X6P LaP PHO BOT CACBU A

CrjCj - NiCr TREN NEN TRUC THEP 40Cr BANG PHUONG

PHAP PHUN 6XY - NHIEN LIEU T6 C O O CAO (HVOF)

IDENTIFY SUITABLE RANGE OF TECHNICAL PARAMETERS FOR THE

BEST POROSITY OF CijC^ - NiCr COATING ON C45 STEEL BY HIGH

VELOCITY OXY-FUEL SPRAYING (HVOF) METHOD

PGS,TS. Dinh VSn Chiin

Tniofng Dai hgc Mo - Dia chat

TOM TAT

Hien nay, cong nghe phun phu dang duac phdt trien mgnh a cdc nuac tien tiin tren thi gidi.

Mot trong nhimg phuang phdp phun dui?c img dipigpho biin trong cdc ngdnh cong nghidp hiin

nay do la phuang phdp phun HVOF. Ve bdn chit, cdc Icrpphun bdng phucmg phdp phun HVOFvo

ciing phuc tgp, cdc dgc tinh vd vi cdu true cua lap phit phu thuoc rdt nhieu vdo cdc thdngsd trong

qud trinh phun. Trong bdi bdo ndy giai thieu kit qud nghien cuu dnh huong eita mQt sS thong si

cong nghe din do xdp ciia lop phii Crf^-NiCr tren nin true thep 40Cr bdng phucmg phdp phun

HVOF. Tii do lua chpn dupe ving thong sS cong nghf phun hap ly di phuc hdi cdc chi tiit dgng

true bi mon.

Tir khoa: Phunphu kim logi, phun HVOF, hot cacbua Crfi^-NiCr, lap phu, dp xdp.

ABSTRACT

Spray coating technology has been developed and widely applied in developed countries.

One of spraying methods that is most common used in industry is HVOF. Basically, coating layers

created by HVOF are very complicated, its characteristics and microstructure strongly depend

on spraying technical parameters. In this paper, effect of some spraying technical parameters to

coating porosity ofCrf^-NiCr on 40Cr by HVOF is studied From experimental results, a suitable

range of spraying technical parameters has been identified that could be applied to recovery shaft

type wearing parts.

Key words: Metal spraying HVOF spraying Crf^-NiCr, coating layers, porosity.

ISSN 0866-7056

TAP CHl CO KHI VI$T NAM, S6 1+2 nam 2017

www.cokhivietnam.vn