Metalografia na Inglaterra entre o final do sculo XIX e incio do sculo XX FULANO DE TAL, CICRANO DE

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Metalografia na Inglaterra entre o final do
século XIX e início do século XX FULANO DE TAL,
CICRANO DE TAL, CICLANO DE TAL, COISINHA DE
JESUS, CONCHITA DE TAAL
Figure 3 Microtopographic
examination of the used upper rolls. Detail of
the regions with perimetric wear marks, showing
the presence of indentation marks, cracking
(dotted arrow) and encrusted 2 mm Si-rich
particles (bold arrows). SEM-BEI.
Figure 4 Lubricant residues revealed the
presence of exogenous material, such as deformed
helicoidal wires (originated by the release of
the stainless steel bristles of the cleaning
brush). SEM-SEI. Figure 5
- Microtopographic examination of the cracked
stainless steel belt. Belt / wood interface
showed the presence of numerous parallel
secondary cracks perpendicular to the direction
of the belt movement (see large black arrow). The
secondary cracks are parallel to the main crack
and associated to the presence of indentation and
spalling (see arrows).

• Figure 6 - Macrostructural examination of the
  cracked stainless steel belt - longitudinal
  section, showing the presence of 500 mm deep 45
  cracks at the belt/ roll interface (see arrows)
  due to contact fatigue, leading to the formation
  of spalling.

• 1- RESUMO
• The premature failure of an agglomeration
  machine used for the annual production of 360,000
  m3 of eucalypt fiber panels was investigated to
  identify the cracking of stainless steel belts
  (126 m x 2.9 m x 3.0 mm).
• These belts are used to compress a cushion
  composed of eucalyptus fibers and glue (see
  fig.1).

CENTENÁRIO DA METALOGRAFA NO BRASIL PMT 2402
METALOGRAFIA E TRATAMENTO TÉRMICO 2007 PROF.
DR. CESAR R. F. AZEVEDO