Austenitic stainless steel, application thereof and surfacing process
A kind of austenitic stainless steel, process technology, applied in gas flame welding equipment, manufacturing tools, welding equipment and other directions, can solve the problems of intergranular corrosion at the interface between the surfacing layer and the base metal, and avoid intergranular corrosion, welding seam and other problems. The effect of strong binding force and high overall strength
Inactive Publication Date: 2017-09-29
SICHUAN HUADU NUCLEAR EQUIP MFR
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Problems solved by technology
[0006] The purpose of the present invention is to provide austenitic stainless steel to solve the problem of intergranular corrosion tendency at the junction of the surfacing layer and the base metal when the existing austenitic stainless steel adopts oxyacetylene surfacing welding hooks and small holes on the connecting rod
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Embodiment 1
[0062] Austenitic stainless steel, by weight percentage, wherein, C: 0.1%, Ni: 16%, Cr: 20%, Nb: 1.0%, other basic constituent elements (Si, Mn, S, P, Cu, Fe) are It is controlled within the standard range of austenitic stainless steel, in which the ratio of Cr to Ni is 1.25.
Embodiment 2
[0064] Austenitic stainless steel, by weight percentage, wherein, C: 0.06%, Ni: 24%, Cr: 28%, Nb: 0.8%, other basic constituent elements (Si, Mn, S, P, Cu, Fe) are It is controlled within the standard range of austenitic stainless steel, in which the ratio of Cr to Ni is 1.17.
Embodiment 3
[0066] Austenitic stainless steel, by weight percentage, wherein, C: 0.05%, Ni: 18%, Cr: 24%, Ti: 0.6%, other basic constituent elements (Si, Mn, S, P, Cu, Fe) are It is controlled within the standard range of austenitic stainless steel, in which the ratio of Cr to Ni is 1.33.
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The invention discloses austenitic stainless steel and its application and surfacing welding process. The austenitic stainless steel is calculated by weight percentage, C: ≤0.1%, Ni: 16%-24%, Cr: 20%-28%, Nb Or Ti: ≤1.0%. The austenitic stainless steel described in the present invention is a new type of corrosion-resistant austenitic stainless steel suitable for oxyacetylene flame surfacing welding, which is developed according to the structural characteristics of hook claws and connecting rods, the special oxyacetylene welding method and the oxyacetylene welding process. Stainless steel, the new austenitic stainless steel is not only basically consistent with the existing Z2CN19-10 nitrogen control and Z6CNNb18-11 in terms of mechanical properties, but also can effectively reduce the carburization of the substrate during oxyacetylene flame surfacing, thereby effectively It is of great practical value to avoid the intergranular corrosion problem of the oxyacetylene welded claw parts.
Description
technical field [0001] The invention relates to the technical field of oxyacetylene surfacing welding of claws and connecting rod parts of a PWR control rod drive mechanism, in particular to austenitic stainless steel and its application and surfacing welding process. Background technique [0002] The claws and connecting rod parts are the executive parts of the main action of the PWR control rod drive mechanism, and the quality assurance level is Q1. The quality of the parts directly determines the overall quality of the control rod drive mechanism. [0003] The base material of the claw and the connecting rod is made of austenitic stainless steel, and a cobalt-based alloy wear-resistant layer is surfacing welded by oxyacetylene on the small hole and the tooth surface. The combination of different materials can effectively ensure the hardness, wear resistance, corrosion resistance and high temperature stability of the mating surface of the parts, as well as the toughness of...
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IPC IPC(8): C22C38/48C22C38/50B23K5/18
CPCC22C38/48B23K5/18C22C38/50
Inventor 黄曦雨
Owner SICHUAN HUADU NUCLEAR EQUIP MFR
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