Intergranular fracture of low-alloy cast steel

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Materials Characterization

DOI:https://doi.org/10.1016/1044-5803(95)00255-3· OSTI ID:260357

Li, Cao; Guangying, Zhou ^[1]

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1. Shenyang Inst. of Tech. (China). Dept. of Materials Engineering

A series of microstructural, macrostructural, and fracture observations, mechanical properties tests, and analyses of electroextracted nonmetallic inclusions have been made on samples from two high-carbon Cr and Cr-Mo cast-steel rolls. The fracture comparison test at 950 C and room temperature showed that intercrystalline fracture occurs at high temperatures. AlN precipitates were extracted from the surfaces of rock-candy-type fractures. Well-defined dendrites are seen in some places in the cracked area. Close to them, coarse carbide needles and ledeburites, which are rich in Cr and Mn, are precipitated along the primary austenite grain boundaries. An explanation is given for the occurrence of the intercrystalline fracture in accordance with the test results, and measures are suggested to eliminate this kind of defect.

• OSTI ID: 260357
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 2 Vol. 36; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CARBIDES
CHROMIUM
CRACKS
DENDRITES
EMBRITTLEMENT
FRACTURE PROPERTIES
GRAIN BOUNDARIES
INCLUSIONS
LOW ALLOY STEELS
MANGANESE
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM
PRECIPITATION
TEMPERATURE DEPENDENCE