Supersolidus Sintering and Mechanical Properties of Water–Atomised M3/2 High–Speed Steel Powder Sintered Under Nitrogen–Based Atmosphere
DOI:
https://doi.org/10.11113/jt.v41.692Abstract
Keupayaan untuk menghasilkan keluli laju–tinggi kepada bentuk hampir sebenar menggunakan relau tali–sawat berterusan menawarkan peluang untuk mempertingkatkan sifat–sifat serta mengurangkan kos pemprosesan bahan keluli ini. Sehingga kini, masalah yang timbul bagi mencapai matlamat tersebut adalah keperluan menggunakan suhu persinteran tinggi (1250–1350°C) di dalam atmosfera vakum. Satu kaedah persinteran yang murah terhadap serbuk keluli laju–tinggi pengabusan–air telah dibangunkan menerusi projek ini menggunakan mekanisme Persinteran Fasa Pepejalan–lampau Cecair (PFPC). Serbuk M3/2 keluli laju–tinggi ini boleh tersinter kepada ketumpatan penuh (>95% daripada ketumpatan teori) di dalam atmosfera berasaskan–nitrogen pada suhu persinteran 1150°C. Mikrostruktur dan sifat–sifat mekanik yang baik telah berjaya dihasilkan selepas proses rawatan haba yang sesuai dilakukan. Kata kunci: Pepejalan-lampau, serbuk pengabusan-air, atmosfera berasaskan-nitrogen The ability to produce near net shape high–speed steels using a continuous belt furnace offers the opportunity to improve the properties and reduce the processing cost of these materials. So far, the difficulty in making this advancement has been the requirement of high sintering temperatures (1250–1350°C) in vacuum atmosphere. A low cost–sintering route of water–atomised high–speed steel powder has been developed during this project using Supersolidus Liquid Phase Sintering (SLPS) mechanism. This water–atomised M3/2 high–speed steel powder can be sintered to full density (>95% of theoretical density) under nitrogen–based atmosphere at sintering temperature of 1150°C. Acceptable microstructures and mechanical properties have been obtained after appropriate heat treatment. Key words: Supersolidus, water-atomised powder, nitrogen-based atmosphereDownloads
Published
2012-02-25
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Science and Engineering
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How to Cite
Supersolidus Sintering and Mechanical Properties of Water–Atomised M3/2 High–Speed Steel Powder Sintered Under Nitrogen–Based Atmosphere. (2012). Jurnal Teknologi, 41(1), 77–84. https://doi.org/10.11113/jt.v41.692