Details

Title

The Althoff-Radtke Test Adapted for High Chromium Cast Iron

Journal title

Archives of Foundry Engineering

Yearbook

2016

Numer

No 4

Publication authors

Keywords

Mechanical properties ; Castings defects ; Hot crack ; High chromium cast iron ; modification

Divisions of PAS

Nauki Techniczne

Description

Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.

Abstract

The paper presents results of the possibility of adapting the Althoff-Radtke test for High Chromium Cast Iron. The Althoff-Radtke test is a

clump attempt used for steel. The Althoff-Radtke test has four different lengths of clamp which qualifies it as a test to quantitatively take

into account different kinds of shrinkage ΔL. The length of the slot of the cracked corner and the length of each staple (50 - 350 mm) are

the parameters tendency to cast cracks. Castings of white cast iron have a high tendency to hot cracking due to the large range of

solidification temperatures, unfavorable kinetics parameters of shrinkage, and especially a lack of expansion before shrinkage. Shrinkage

of high chromium white cast iron is similar to the shrinkage of cast steel, and is approximately 2%. Therefore it is important to test

susceptibility to hot cracks. Research was carried out under industrial conditions. Four melts were performed, one of the initial chemical

composition and the other three modified by different amounts of Fe-Ti, respectively, 0.25%, 0.5% and 0.75% Fe-Ti. The propensity for

hot cracking was based on the observation of the dark surface in the corner of the sample. The study shows that the Althoff-Radtke test can

be adapted to determine the tendency for hot cracking of high chromium cast iron. It should however be noted that the test results cannot be

compared with those for other alloys.

Publisher

The Katowice Branch of the Polish Academy of Sciences

Date

2016

Type

Artykuły / Articles

Identifier

ISSN 2299-2944

References

Bedolla (2007), The effect of titanium on the wear behavior of a Cr white cast iron under pure sliding, Wear, 263. ; Jura (2001), Pęknięcia na gorąco odlewów staliwnych problemem ciągle nierozwiązanym of Foundry ( in Polish, Archives, 1, 512. ; Studnicki (2005), Crystallization temperatures of chromium cast iron in function cooling rate of Foundry in Polish, Archives, 5, 371. ; Tabrett (1996), Microstructure - property relationships in high chromium white iron alloys Materials Reviews, International, 41, 59. ; Bennet (1974), Adhesive Fracture Mechanics of Fracture, International Journal, 10.

DOI

10.1515/afe-2016-0084

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