Abstract
1. Steel Kh20N20 alloyed with up to 5% Si is not embrittled on tempering up to 10 h. With 6% Si the steel is embrittled in 1 h. 2. The embrittlement of steel Kh20N20 with 6% Si and steel Kh20N20 with more than 4% Si on prolonged tempering (over 100 h) is evidently due to the precipitation of an intermetallic phase enriched in silicon.
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