Stainless-steel sheet for metal mask

Abstract

Provided is a stainless-steel sheet for metal masks which is inexpensive, has high strength, generates little dross to attain high productivity, and has excellent durability. This steel sheet contains, in terms of mass%, up to 0.15% C, up to 2.0% Si, up to 4.0% Mn, up to 0.04% P, up to 0.03% S, up to 4.0% Ni, 10-20% Cr, and up to 0.12% N, with the remainder comprising Fe and incidental impurities. The steel sheet has a [gamma]max value of 70-90 and has a metallographic structure which is a two-phase structure consisting of a ferrite phase and a martensite phase. The steel sheet has a solidification completion temperature of 1,450 C or higher. The steel sheet has a solid-liquid coexistence range during the period from a molten state to solidification of 30 C or less.

Description

technical field [0001] The present invention relates to a stainless steel plate for high-strength metal mask with multi-phase structure. Background technique [0002] As the stainless steel plate facing the metal mask, a tempered rolled material of SUS304 is currently used in many cases. In addition, in the tempered rolling material of SUS304, the SUS3043 / 4H-TA material was the mainstream in the past, but from the viewpoint of durability, the high-strength SUS304H-TA material is now the mainstream. [0003] Such SUS304 has the advantages of high strength and excellent durability because it is a commonly used steel, so the material is easy to mix, and processing-induced martensitic transformation occurs with processing. On the other hand, because it contains a large amount of rare Metallic Ni is therefore very effective. [0004] In the manufacturing method of the metal mask, there are laser processing, etching processing, and additive method (electroforming method) dependi...

AI Technical Summary

Problems solved by technology

[0014] However, for the SUS304H-TA material that has been strengthened by conditioning rolling, there is a problem when performing laser processing: the raw material is softened by heat in the vicinity of the laser stamped part, and as repeated use For metal masks, there will be defects such as corner cracks (corner ち) caused by wear and tear near the punched end surface, which is the so-called undercut (だれ)

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