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Manufacturing method of martensite-based stainless steel for edged tools
US9687893B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9687893-B2 |
| Application number | US-201414781197-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 18, 2014 |
| Priority date | Apr 1, 2013 |
| Publication date | Jun 27, 2017 |
| Grant date | Jun 27, 2017 |
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Abstract
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There is provided a manufacturing method of martensite-based stainless steel for edged tools, which can decrease the number of passes during final cold rolling thereby to improve productivity. In the manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less by cold rolling, the final cold rolling is performed under condition of a diameter of a work roll of 100 to 130 mm, a cold rolling speed of more than 120 and not more than 200 m/min, and a lubricating oil viscosity of 30 to 40 mm 2 /s. Preferably, the cold rolling speed is 150 to 190 m/min, and the lubricating oil viscosity is 33 to 39 mm 2 /s.
First claim
Opening claim text (preview).
The invention claimed is: 1. A manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less, comprising: performing final cold rolling of the martensite-based stainless steel for edged tools under condition of a diameter of a work roll of 100 to 130 mm, said cold rolling having a cold rolling speed of more than 120 and not more than 200 m/min, and applying a lubricating oil having a viscosity of 30 to 40 mm2/s to said cold rolling step. 2. The manufacturing method of martensite-based stainless steel for edged tools according to claim 1 , wherein the cold rolling speed is 150 to 190 m/min, and the lubricating oil viscosity is 33 to 39 mm 2 /s. 3. The manufacturing method of martensite-based stainless steel for edged tools according to claim 1 , wherein hardness after the final cold rolling is 280 to 340 HV. 4. The manufacturing method of martensite-based stainless steel for edged tools according to claim 2 , wherein hardness after the final cold rolling is 280 to 340 HV. 5. The manufacturing method of martensite-based stainless steel for edged tools according to claim 1 , wherein the martensite-based stainless steel for edged tools comprises 0.3 to 1.5% by mass of C, 10 to 18% by mass of Cr, 1% by mass or less of Si, 1.5% by mass or less of Mn, 0 to 3% by mass of Mo, 0 to 1% by mass of Ni, 0 to 1% by mass of V, 0 to 0.001% by mass of B, 0 to 0.2% by mass of N, and remainder Fe and unavoidable impurities.
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Classifications
Lubricating, cooling or heating rolls · CPC title
by cold-rolling · CPC title
containing manganese · CPC title
with molybdenum or tungsten · CPC title
- B21B3/02Primary
Rolling special iron alloys {, e.g. stainless steel} · CPC title
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- What does patent US9687893B2 cover?
- There is provided a manufacturing method of martensite-based stainless steel for edged tools, which can decrease the number of passes during final cold rolling thereby to improve productivity. In the manufacturing method of martensite-based stainless steel for edged tools having a thickness of 0.1 mm or less by cold rolling, the final cold rolling is performed under condition of a diameter of a…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification B21B3/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 27 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).