Abstract
1. Cold plastic deformation by 15–30% increases the strength of Cr−Mn and Cr−Ni steels by 25–30%. The strength of the Cr−Mn steels after deformation is 50% higher than that of Cr−Ni steel. 2. Cold plastic deformation (up to 20% for Cr−Mn steel and up to 17% for steel Kh18N10T) increases the time to cracking, while larger deformation reduces the resistance of the steels to corrosion cracking in boiling 42% MgCl2. The time to cracking of Cr−Mn steel after deformation and passivation is two to three times higher than that of steel Kh18N10T. 3. The resistance to corrosion cracking is highest for the steel with an evenly distributed three-dimensional dislocation network. This structure occurs in steel Kh18N10T after 12–17% deformation, and in Cr−Mn steel after 17–22% deformation. 4. The good mechanical and technological properties, low cost, and high corrosion resistance of Cr−Mn steel can be utilized for heavy-duty fasteners and threaded connectors and other parts operating in corrosive media with chloride ions as a replacement for Cr−Ni steels of the 18/10 type.
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