|
|
|
| Control and analysis of powder metallurgy steel sintering process |
| TAN Zhao-qiang，WANG Hui，UlfEngstr?m |
| （H gan s China Co.， Ltd.， Shanghai 201799， China） |
|
|
|
|
Abstract The control of sintering process is very critical for PM technology. Bad control during sintering will cause inconsistence in dimension and mechanical properties of sintered parts， and even some failure issue， like oxidation， decarburization， carburization， blistering and sooting. With the higher requirement on the performance and cost of PM products， chromium with high hardenability and low cost becomes an interesting development of PM industry. However， Cr is easy to be oxidized， and has strict requirement on sintering atmosphere， so it is a challenge to the sintering process. With the development of sintering furnace and the wide use of nitrogen based protective gas， the sintering of PM part with Cr components in the net belt furnace has become a reality. Practical field experiences with sintering furnace atmosphere based on nitrogen and hydrogen mixed gas were given by utilizing a measuring system consisting of thermal couple， oxygen and CO probes. The cause and effect relationships for many common atmosphere-related problems were explored and solutions offered for corrective action， as well as the sintering requirement of materials with Cr were summarized.
|
|
Received: 17 November 2015
Published: 15 December 2016
|
|
|
|
| [1]于洋.烧结钢过程中的气氛控制及其对性能的影响（1）. 粉末冶金技术，2002, 20（4）：239-243.[2]J Arvidsson et al.On-Line Measurement of Sintering Atmospheres.Proceedings 1998 Powder Metallurgy World Congress, Vol 2, pp. 253 – 260.[3]B Lindqvist.Chromium Alloyed PM Steels – A New Powder Generation.Proceedings EURO PM 2001, Vol 1 (2001):13 – 21.[4]U Engstr?m. From raw material to new challenging applications, EURO PM 2013.[5]C Lindberg. Mechanical Properties of A Water Atomised Fe-Cr-Mo Powder and How to Sinter It. Advances in Powder Metallurgy & Particulate Materials, Part 7 (1999):229 – 243.[6]T Philips. Trouble-Shooting Guide for Sintering Furnace Atmospheres. Engineering and Technology, Vol 26 (3):243-250. |
|
|
|
2016, Vol. 26 
