Structure and properties of 4Kh3VMFS and 3Kh3VMF heat-resistant die steels
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The austenitic grain growth of types 4Kh4VMFS and 3Kh3VMF hot work die steels in heating may be caused by solution of carbides, migration of boundaries, or "scattering" of them, which determines the optimum hardening temperature of these steels, 1120–1140°C for 4Kh3VMFS and 1060–1080°C for 3Kh3VMF, respectively. The combination of properties of the new steels significantly exceeds that of the standard.
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