کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5464610 | 1398856 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of pre-heat conditions on diffusion hardening of pure titanium by vacuum rapid nitriding
ترجمه فارسی عنوان
تأثیر شرایط پیش گرمائی بر تشدید نفوذ تیتانیوم خالص توسط نیتروژن سریع خلاء
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کلمات کلیدی
تیتانیوم، نیترید، درمان قبل از حرارت، سخت شدن سطح گرادیان، لایه داخلی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
چکیده انگلیسی
The pre-heat treatment in vacuum rapid nitriding process was introduced to improve the surface hardening characteristics such as thick depth, high hardness and particularly to reduce the processing time. The pre-heat treatment was maintained for 30 min with an interval of 10 °C at the temperatures of 700- 800 °C under a high vacuum to allow the absorption of oxygen atoms on the titanium surface into the inner side. The following nitriding processes were equally performed at the same condition as 800 °C for 1 h. As a result, the depth of a hardened layer in the sample, which was treated at 800 °C for 1 h with the pre-heat treatment at 760 °C for 30 min, was similar to that of the treated sample at 800 °C for 3 h without pre-heat treatment and the depth was about 40 μm. The processing time can be largely reduced by introducing the pre-heat treatment process. The pre-heated specimens showed a longer wear lifetime by more than three times and higher friction resistance than that of PVD or non-nitrided specimens. The surface gradient-hardened layers exhibited excellent wear resistance and could prevent separation or debonding between matrix and the coated layer effectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 326, Part B, 15 October 2017, Pages 395-401
Journal: Surface and Coatings Technology - Volume 326, Part B, 15 October 2017, Pages 395-401
نویسندگان
Hyeon-Gyeong Jeong, Yongtai Lee, Dong-Geun Lee,