Rolled round steel material for steering rack bar, and steering rack bar
US-9976206-B2 · May 22, 2018 · US
Method for manufacturing magnetostrictive torque sensor shaft
US2018195142A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018195142-A1 |
| Application number | US-201715854102-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 26, 2017 |
| Priority date | Jan 11, 2017 |
| Publication date | Jul 12, 2018 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
Provided is a method for manufacturing a magnetostrictive torque sensor shaft mounting a sensor portion of a magnetostrictive torque sensor. The method includes conducting heat treatment on a shaft material including chrome steel or chrome-molybdenum steel by carburizing, quenching and tempering, and conducting shot peening on the shaft material after the heat treatment at least on a position where the sensor portion is to be mounted. The shot peening is conducted by firing shot with a particle size of not less than 0.6 mm and a Rockwell hardness of not less than 60 at a jet pressure of not less than 0.4 MPa for a jet exposure time of not less than 2 minutes.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method for manufacturing a magnetostrictive torque sensor shaft mounting a sensor portion of a magnetostrictive torque sensor, the method comprising: conducting heat treatment on a shaft material comprising chrome steel or chrome-molybdenum steel by carburizing, quenching and tempering; and conducting shot peening on the shaft material after the heat treatment at least on a position where the sensor portion is to be mounted, wherein the shot peening is conducted by firing shot with a particle size of not less than 0.6 mm and a Rockwell hardness of not less than 60 at a jet pressure of not less than 0.4 MPa for a jet exposure time of not less than 2 minutes. 2 . The method according to claim 1 , wherein the shot peening is conducted at a jet pressure of not less than 0.4 MPa and less than 0.55 MPa for a jet exposure time of not less than 5 minutes, or is conducted at a jet pressure of not less than 0.55 MPa for a jet exposure time of not less than 2 minutes. 3 . The method according to claim 1 , wherein the shot peening is conducted at a jet pressure of not less than 0.4 MPa and less than 0.55 MPa for a jet exposure time of not less than 10 minutes, or is conducted at a jet pressure of not less than 0.55 MPa for a jet exposure time of not less than 2 minutes. 4 . The method according to claim 1 , wherein the shot peening is conducted at a jet pressure of not less than 0.55 MPa for a jet exposure time of not less than 2 minutes. 5 . The method according to claim 2 , wherein the shaft material comprises chrome steel. 6 . The method according to claim 1 , wherein the heat treatment is conducted so that the shaft material after the heat treatment has a Rockwell hardness of not less than 58.
Assignees
Inventors
Classifications
during manufacturing of rods or wires · CPC title
- C21D9/0075Primary
for rods of limited length (of unlimited length C21D9/52) · CPC title
by shot-peening or the like · CPC title
involving a particular surface treatment (C21D8/1294 takes precedence) · CPC title
characterised by the working steps · CPC title
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- What does patent US2018195142A1 cover?
- Provided is a method for manufacturing a magnetostrictive torque sensor shaft mounting a sensor portion of a magnetostrictive torque sensor. The method includes conducting heat treatment on a shaft material including chrome steel or chrome-molybdenum steel by carburizing, quenching and tempering, and conducting shot peening on the shaft material after the heat treatment at least on a position w…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification C21D9/0075. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jul 12 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).