Ways to Improve the Quality of Die Steel 5KhNM

There was performed an analysis of influence of the deoxidation technology, hydrogen content and high concentration of titanium in steel 5KhNM (Rus. "5XHM") on quality of die blanks, evaluated based on the results of the ultrasonic test. The fractographic examinations of fractures and the...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-12, Vol.287 (1), p.12003
Main Authors: Efimov, S V, Malykhina, O Yu, Pavlova, A G, Milyuts, V G, Tsukanov, V V, Vikharev, V V
Format: Article
Language:English
Subjects:
Chemical composition
Deoxidizing
Die steels
Evaluation
Flakes (defects)
Fractures
Nickel molybdenum steels
Nonmetallic inclusions
Titanium
Ultrasonic testing
Ultrasonic tests
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Summary:There was performed an analysis of influence of the deoxidation technology, hydrogen content and high concentration of titanium in steel 5KhNM (Rus. "5XHM") on quality of die blanks, evaluated based on the results of the ultrasonic test. The fractographic examinations of fractures and the X-ray microprobe analysis of chemical composition of non-metallic inclusions were conducted, the evaluation of macro- and micro-structure of a die blank with high titanium content was performed. It is demonstrated that defects of dies from steel 5KhNM (Rus. "5XHM") are cracks from merged flakes and micro-flakes; in most cases large concentrations of sulphides appeared to be hydrogen collectors for formation of flakes and micro-flakes.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/287/1/012003