C-N-O supersaturated solid solution martensitic stainless steel powder, preparation method and cladding method

Abstract

The invention discloses a C-N-O supersaturated solid solution martensitic stainless steel powder, a preparation method and a cladding method, and relates to the technical field of laser additive and re-manufacturing. The elements contained in the powder comprise, by weight, 0.18-0.23 part of C, 0.09-0.12 part of N, 0.75-0.90 part of Si, 12.0-14.0 parts of Cr, 0.80-0.95 part of Mn, 1.30-1.80 partsof Ni, 0.45-0.55 part of Al, 0.22-0.30 part of V, 0.045-0.055 part of O, and 81.1-84.16 parts of Fe. After the above elements undergo vacuum melting according to a proportion, the C-N-O supersaturatedsolid solution martensitic stainless steel powder can be obtained by adopting high-purity nitrogen gas atomization. The method for cladding a laser forming layer based on the powder comprises the following steps that 1, raw material treatment is performed; 2, parameter setting is performed; and 3, cladding of the laser forming layer is performed. According to the C-N-O supersaturated solid solution martensitic stainless steel powder, the preparation method and the cladding method, laser fast cooling is used for inducing the non-equilibrium phase change, three interstitial atoms of C-N-O are dissolved in a body-centered structure in a supersaturated mode, then the martensite is formed, and a self-organizing interstitial atom short-range combined unit with the relatively lower energy stateis formed through short-range migration.

Description

technical field [0001] The invention relates to the technical field of laser material addition and remanufacturing, in particular to a C-N-O supersaturated solid solution martensitic stainless steel powder and a preparation and cladding method. Background technique [0002] The key load-bearing parts in mechanical equipment usually work under specific working conditions, and the materials used are usually required to have high strength and toughness, thermal stability and corrosion resistance suitable for service conditions. In order to improve efficiency and achieve energy saving and emission reduction, higher requirements are put forward for the load-to-weight ratio of key load-bearing parts, and ultra-high-strength steel is used more and more in fields with load-to-weight ratio requirements. [0003] With the continuous advancement of laser manufacturing technology, laser additive manufacturing and remanufacturing of ultra-high-strength and tough key load-bearing steel pa...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a C-N-O supersaturated solid solution martensitic stainless steel powder and its preparation and cladding method, which solves the problem of laser additive manufacturing and remanufacturing ultra-high-strength steel heat treatment processes. , not suitable for on-site working conditions and the high cost of powder preparation

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