Loading patent…
AssigneeHitachi, Ltd.
InventorsMatahiro Komuro, Masafumi Noujima, Naoya Okizaki
Estimating the term…
Disclosed herein is a technique to reduce the residual stress of a steel material while improving the mechanical property and the corrosion resistance of the material. A steel material is provided that includes a plurality of ferrite crystal grains, and a laminar iron-rich phase formed at unidirectionally occurring grain boundaries of all grain boundaries of the ferrite crystal grains. A material processing method is provided that includes: heating a steel material that contains a plurality of ferrite crystal grains; applying a magnetic field to a heated portion while heating the steel material; applying an electric field to the heated portion in a direction that crosses the direction of the applied magnetic field while heating the steel material; and measuring a displacement occurring in the steel material under the magnetic field and the electric field.
A material processing method comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
No references of this kind are recorded.
With nickel: with molybdenum or tungsten
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering: with simultaneous application of supersonic…
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering: methods of heating
Methods of heating: direct resistance heating
About 11 years of term left · ends 13 Oct 2037 (estimated)
Field of the Invention
The present invention relates to a steel material, a material processing method, and a material processing apparatus.
Description of the Related Art
FIG. 1 is a diagram representing a configuration for an electromagnetic elastic wave process.
FIG. 2 is a schematic diagram representing a control system of an electromagnetic elastic wave process.
FIG. 3 represents a magnetization curve by an electromagnetic elastic wave process.
The following means are effective to minimize crystal grain growth, and to improve mechanical property and corrosion resistance, and increase lifetime.
1) To apply a magnetic field, an electric field, and a strain field substantially simultaneously to a material in addition to heat energy, and control each of these fields.
2) To use local heating, application of a local magnetic field, a local electric field, and a local strain field.