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Date of Publication:2022-10-09

Journal:热加工工艺

Volume:43

Issue:22

Page Number:227-230

ISSN No.:1001-3814

Abstract:Aiming at bi-metal band saw blades quality problems appearing in the
   process of heat treatment and using, which was crack or burst in the
   matrix, and the phenomenon of insufficient hardness, the quality problem
   of double metal band saw blade were tested and analysed. The results
   show that there are large dissolve carbide particles in M42 high speed
   steel of tooth, which were uneven in carbide size, and decarburization
   and bulky microstructure are discovered in the tooth edge parts, they
   are the main reasons of the lack of tooth abrasion resistance;
   Inclusions existing in the back of the spring steel forming stress
   concentration and tiny crack, under the complex stress function of
   periodic, formed the stress concentration and fatigue crack, there are
   the main failure modes of the saw blades.

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