Accession Number:

ADA156764

Title:

Development of a Sheath for Sensor Protection in Molten Steel Applications.

Descriptive Note:

Final rept.,

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Personal Author(s):

Report Date:

1985-05-01

Pagination or Media Count:

109.0

Abstract:

Studies were performed to select appropriate candidate materials for development of thermal sensor protective sheaths for liquid steel processing systems. Samples of refractory ceramics were tested in laboratory scale melts and the best ceramic, boron nitride BN, was tested at industrial scale in a continuous casting tundish. Industrial tests were performed on a prototype sensor sheath system at 1565 or - 40 C for six tests of approximately five hours each, beginning with cold immersion. The sensor sheath system performed as a temperature monitor and demonstrated a high survivability rate due to the chemical inertness, low wetability high thermal conductivity, and low thermal expansion of the boron nitride. Materials studies included development of representative laboratory test environments, evaluation of failure mechanisms of materials, measurement of erosioncorrosion and wettingpenetration, and compatibility of materials and sensor systems. Analyses included optical microscopy, X-ray diffraction of reaction interface materials, and electron probe detection of the penetration of iron. Keywords Corrosion resistance Erosion resistance Heat resistant materials Liquid metals Protection Refractory materials and Temperature measuring instruments.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE