Nitriding steels of the low-carbon martensitic type
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With a certain combination of alloying elements low-carbon martensitic steels can be nitrided at 575–600°. After a short holding time (6–12 h) a nonbrittle diffusion coating 0.35–0.55 mm deep is obtained, with surface hardness HV5=1000–1050.
After nitriding, the low-carbon martensitic steels developed (08Kh3G2MYu and 08Kh3N2MYu) have practically the same mechanical properties in tension and bending as steels 38Kh2MYuA and 30Kh3VA but surpass them in surface hardness, effective case depth, and fracture toughness in the temperature range of +20 to −60°.
KeywordsMechanical Property Nitrided Fracture Toughness Holding Time Surface Hardness
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