Effects of heat treatment on microstructure and corrosion resistance of 18wt%Cr-3wt%C-5wt%W-0.9wt%Mo iron cast by a semi-solid process

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Chomsaeng N., Chairuangsri T., Wiengmoon A., Poolthong N., Pearce J.T.H.

ผู้เผยแพร่: Hindawi

ปีที่เผยแพร่ (ค.ศ.): 2008

Volume number: 2

หน้าแรก: 561

หน้าสุดท้าย: 564

จำนวนหน้า: 4

ISBN: 9780000000002

eISSN: 1745-4557

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928233733&partnerID=40&md5=f6f8c5f34d9a0b6f20c04a5e179714de

ภาษา: English-Great Britain (EN-GB)

บทคัดย่อ

Microstructurc and corrosion rcsistancc of a 18wt%Cr-3wt%C-5wt%W-0.9wt%Mo iron cast by a semi-solid proccss using a sloped cooling plate method were studied. Effects of heat treatments including tempering, destabilisation, and dcstabilisation plus tempering, were investigated. Microstructural characterisation was performed by scanning and transmission electron microscopy. The results revealed that primary austenite had a spheroidal form instead of a dendritic shape. Radiating clusters of eutcctic structure were obtained. M23C6 secondary carbides precipitated during destabilisation heat treatment within primary austenite, which was later transformed to martensite during air cooling. In as-cast condition, W and Mo were mainly associated with the eutectic carbide. Destabilisation led to a dissolution or transformation of these phases. The best corrosion resistance, as tested by a potcntiodynamic technique in 0.5 M sulfuric acid solution, was obtained from the iron in the as-cast iron. Details of chemical attack in particular conditions were discusscd.

คำสำคัญ

Microstmcture, Semi-solid processing