Abstract
1. Hydrogen absorption causes a sharp reduction in the strength of quench-hardened ShKhl5 steel, irrespective of the refining method used in its fabrication. The loss of strength caused by hydrogen absorption increases with increasing degree of contamination of the steel by nonmetallic inclusions. 2. Current methods (metallographic and anodic dissolution) of qualitative and quantitative determination of the content of nonmetallic inclusions are not sufficiently reliable when applied to high-purity steels refined by vacuum, electroslag, and electron beam melting. 3. Brittle, finely dispersed titanium and silica particles, not detectable by metallographic analysis, represent the most harmful impurities. Electron beam melting appears to be the most efficient method of reducing the gas and non-metallic impurities content of steel.
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