NGHIÊN CỨU KẾT HỢP CÔNG NGHỆ THẤM NITƠ THỂ KHÍ VÀ PHỦ PVD CHO THÉP BỀN NÓNG SKD61
Chi nhánh Phía Nam, Trung tâm Nhiệt đới Việt - Nga
Số 3, đường 3 tháng 2, Phường 11, Quận 10, TP.HCM
Số điện thoại: 0961674489; Email: doanvan.ttndvn@gmail.com
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Tóm tắt
A RESEARCH ON THE COMBINATION OF GAS NITRIDING AND PVD COATING FOR SKD61 HOT WORKING STEEL
This article presents the results of research on surface treatments for SKD61 steel aiming to fabricate the core-pin used in high pressure aluminum casting. The tempered SKD61 sample with a surface hardness of 597 HV0,1 was nitrided to obtain a surface hardness of 1155 HV0,1 and the thickness of the nitrided layer was 80 µm. The Cr/CrN multilayer coatings were deposited by cathodic Arc-PVD on nitrided and tempered SKD61 substrates so that the hardness reached 1538 and 1755 HV0,1 respectively. The coating thickness obtained was approximately 2 µm for both coating samples. The results showed that the Cr/CrN multilayer coating significantly improved the corrosion and abrasion resistance of the tempered steel substrate and the gas-nitrided substrate. The PVD coating on nitrided substrate exhibited adhesion to the substrate HF1-HF2 level, while the coating on the tempered substrate only obtained HF6 level according to VDI 3198 standard.
Từ khóa
Core-pin, duplex treatment, multilayer coating, nitriding, Chốt tạo lỗ, xử lý bề mặt kép, phủ đa lớp, thấm nitơ
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Tài liệu tham khảo
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