Preparation of carbide isolates of new high-speed steel for analysis by atomic absorption spectrometry

• Published in: Mikrochimica acta (1966) Vol. 130; no. 1-2; pp. 117 - 122
• Main Authors: RICHTER, J, WYCISLIK, A, CWAJNA, J
• Format: Journal Article
• Language: English
• Published: Wien Springer 01.01.1998; New York, NY
• Subjects: Analysing. Testing. Standards; Analytical chemistry; Applied sciences; Chemistry; Exact sciences and technology; Metals. Metallurgy; Spectrometric and optical methods; Standardization and quality control; Elementary analysis; Chemical analysis; Austenitic steel; Quality control; Metallurgy; Structural analysis; Atomic absorption spectrometry
• ISSN: 0026-3672; 1436-5073
• DOI: 10.1007/BF01254600

The paper presents results of the investigation of a new high-speed steel's (HSS) carbide isolates, using atomic absorption spectroscopy (AAS). Because of the presence of metallic residues, two stage preparation of isolates was applied: electrolytic winning of the carbide isolates, followed by additional treatment with phosphoric acid. The chemical compositions so obtained were of enhanced accuracy and served as input data for computing the matrix's chemical composition. This indirect approach reduced the errors connected with the phases mutual contribution, such as occur in the case of HSSs and steels of similar multi-phase microstructure when bulk specimens are investigated with energy dispersive XRF. The extent of the carbides' dissolution in the matrix and hence the matrix's saturation during hardening, as well as the character of secondary precipitation while tempering, were assessed. These findings are of importance in respect of both phenomena during heat treatment and the investigated steel's properties.