Pure titanium sheet having excellent balance between press formability and strength and excellent corrosion resistance, and process for manufacturing same

Abstract

This pure titanium sheet contains 0.02 to 0.10% of Fe and 0.04 to 0.20% of O, the balance consisting of titanium and unavoidable impurities and the Fe content and the O content satisfying relationship (1). In the pure titanium sheet, the area fraction of regions that exhibit Schmid factors of {11-22}<11-23> twin of 0.45 or more is at least 43%, each Schmid factor being determined with the axis set in the direction of rolling at a position corresponding to one-fourth of the sheet thickness. Further, the pure titanium sheet has a volume fraction of ß phase of 0.3% or less. [O content (mass%)] + 0.12×[Fe content (mass%)] = 0.050 ··· (1)

Description

technical field [0001] The present invention relates to a pure titanium plate having excellent balance between press formability and strength and corrosion resistance at room temperature and a method for producing the same. Specifically, it relates to a strength (tensile strength) of 343 MPa or higher even at room temperature, and A pure titanium plate having excellent press formability and crevice corrosion resistance and a method for producing the same. Moreover, this invention relates to the method of press-forming such a pure titanium plate, and manufacturing the heat exchange member of a plate heat exchanger. Background technique [0002] Titanium utilizes its excellent corrosion resistance, stamping formability, specific strength, light weight, etc., for example, in aircraft parts, chemical equipment components, structural materials in coastal areas (especially in seawater contact corrosion promotion materials) Commonly used in a wide range of fields and uses such as ...

AI Technical Summary

Problems solved by technology

However, if alloy components are added, productivity will decrease, making it unsuitable for industrial-scale production.

In addition, there is no specific disclosure about corrosion resistance.

[0014] Thus, a pure titanium plate having excellent balance between press formability and strength at room temperature and excellent crevice corrosion resistance has not yet been provided.

Images