Nghiên cứu đặc tính vật liệu bimetal thép các bon hợp kim ni67cr18si5b4 sau phun phủ bằng phương

NGHIEN CtfU-TRAO DOI

NGHIEN CU'U DAC TINH VAT LIEU BIMETAL THEP CAC BON - HOT KIM

Ni67Cr18SI5B4 SAU PHUN PHU BANG PHU'aNG PHAP PLASMA

RESEARCHING MATERIALS PROPERTIES OF BIMETAL CARBON STEEL - ALLOY

67NI18CR5SI4B AFTER PLASMA SPRAYING

PGS, TS. Ha Minh Hung, NCS. Tran Van Dung, TS. Phan Thach Hd

Vien Nghien cflu Co khi - Bp Cong ThflPng.

TOM TAT

Bdi bdo gidi thieu ve ket qud nghien cdu ddc tinh chdt cua vdt lieu bimetal thepcdc bon - hdp kim

Ni67Crl8Si5B, nhdn dUdc bdng phUdng phdp phun plasma tgi vung bien gidi lien ket 2 ldp, nhdm muc

tieu Ung dung cho viec phuc hoi cdc chi tiet mdy co dgng hinh tru sau khi bi mdi mon. Tinh chdt cua vdt

lieu ldp phu dUdc khdo sdt bang phUdng phdp kim tUdng hgc vd phdn tich SEM-EDX nhdm muc dich xdc

dinh sU khac nhau cua moi lien ket kim logi dUdc hinh thdnh gida cdc ldp phu vdi ldp kim logi nen thong

qua hai che do phun bgt hdp kim trUc tiep vdo chi tiet true vd thong qua mgt ldp lot cong nghe trung gian.

Ket qud phdn tich SEM-EDX cho phep xdc dinh thdnh phdn hoa hgc cdc phdn td cdu triic kim logi trong

ldp phu, tren bien gidi 2 ldp vd trong kim logi nen cd bdn. Do Id nhdng ludn cd khoa hgc minh chdng

cho do cdng, do ben bdm dinh gida ldp phu vdi kim logi nen dam bdo chdt lUdng cua chi tiet mdy ldm

viec trong dieu kien tdi trgng ldn vd chiu mdi mon cao trong bg doi tiep xuc vdi bge trUdt bdng hdp kim

dong. Ddy cUng Id mgt phdn ket qud nghien cdu thUc nghiem cua nhom nghien cdu tai Trung tdm CTA￾NARIME, Vien Nghien cdu Cd khi vd co sU trUc tie'p tham gia cua nghien cdu sinh.

ABSTRACT

This article introduce on research Results of Materials Properties of 67Ni 18Cr5Si4B Bimetal

Carbon Steel - Alloy existing in border area of two materials joined by plasma spraying method for the

purpose of recovering worn cylindrical-shape machine parts. Investigating Material properties of the

coating layer by means of crystal structure analysis and SEM-EDX analysis method for the purpose of

determining properties of joints between coating layer and primary material received from two types of

alloy powder spaying: directly on journal and on advance spayed lining layer. SEM-EDX analysis result

allows determining chemical component, crystal structure of coating layer, intermediate area of coating

layer and primary layer. That is scientific evidences proven for affection of hardness and durability of

Plasma spraying coating layers serving as copper-alloy bush plain bearing and under working conditions

of heavy loads and high abrasives. This is a part of experiment research result of research team of

CTA-NARIME Center of National Research Institute of Mechanical Engineering, in which Ph.D.

students is a key member. ^

TAP CHf CO KHf VI£ T NAM V S6 I+2(Thang 1+2 nim20t3 )