US3929428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wearing member having a pad-welded surface layer high in wear-resistance and heat crack-resistance
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1971-02-08
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Granted: 1975-12-30
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Expires: 1991-02-08
Abstract
Abstract A wearing member having a pad-welded metallic surface layer with high wear and heat crack-resistance and having no irregular hardness is formed by pad-welding deposited steel in a composition range of 0.1 to 0.5 % C, 0.1 to 1.3 % Si, 0.3 to 2.0 % Mn, 1.0 to 5.0 % Cr, 0.5 to 5.0 % Mo and 0.5 to 3.0 % V, the rest being Fe and unavoidable impurities, or further containing one or more of less than 2.0 % W, less than 5.0 % Ni and less than 3.0 % Co.
Inventors
- 👤 Takeshi Nishi
- 👤 Tsurugi Kimura
- 👤 Isao Moriguchi
- 👤 Kiyoshi Yokoi
- 👤 Isojiro Nakakobo
- 👤 Ryohei Kumagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:18
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/3093; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/4956; Y10T29/49563; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
A ROLLER FOR HOT ROLLING OPERATIONS COMPRISING AN ALLOY LAYER WELDED TO A STEEL SUBSTRATE, SAID ALLOY CONSISTING ESSENTIALLY OF 0.1 TO 0.5% C, 0.1 TO 1.3% SI, 0.3 TO 2.0% MN, 1.0 TO 5.0% CR, 0.5 TO 5.0% MO AND 0.5 TO 3.0% V, THE REMAINDER BEING FE.
Claim 2
Dependent Claim
49 words
A ROLLER FOR HOT ROLLING OPERATIONS COMPRISING AN ALLOY LAYER WELDED TO A STEEL SUBSTRATE, SAID ALLOY CONSISTING ESSENTIALLY OF 0.1 TO 0.5% C, 0.1 TO 1.3% SI, 0.3 TO 2.0% MN, 1.0 TO 5.0% CR, 0.5 TO 5.0% MO AND 0.5 TO 3.0% V, THE REMAINDER BEING FE.
Claim 3
Dependent Claim
88 words
A roller for hot rolling operations comprising an alloy layer welded to a steel substrate said alloy consisting essentially of 0.1 to 0.5% C, 0.1 to 1.3% Si, 0.3 to 2.0% Mn, 1.0 to 5.0% Cr, 0.5 to 5.0% Mo and 0.5 to 3.0% V, and at least one member selected from the group consisting of W, Ni and Co, said members being present in amounts sufficient to improve strength but less than 2% W, less than 5% Ni and less than 3% Co, the remainder being Fe.
Claim 4
Dependent Claim
88 words
A roller for hot rolling operations comprising an alloy layer welded to a steel substrate said alloy consisting essentially of 0.1 to 0.5% C, 0.1 to 1.3% Si, 0.3 to 2.0% Mn, 1.0 to 5.0% Cr, 0.5 to 5.0% Mo and 0.5 to 3.0% V, and at least one member selected from the group consisting of W, Ni and Co, said members being present in amounts sufficient to improve strength but less than 2% W, less than 5% Ni and less than 3% Co, the remainder being Fe.
Claim 5
Dependent Claim
21 words
A roller according to claim 1 wherein the thickness of the finished weld of said alloy is 5 to 20 mm.
Claim 6
Dependent Claim
21 words
A roller according to claim 2 wherein the thickness of the finished weld of said alloy is 5 to 20 mm.
Claim 7
Dependent Claim
20 words
A roller according to claim 1 wherein the steel substrate is carbon steel, low carbon alloy steel or cast steel.
Claim 8
Dependent Claim
20 words
A roller according to claim 2 wherein the steel substrate is carbon steel, low carbon alloy steel or cast steel.
Claim 9
Dependent Claim
32 words
A roller according to claim 1, wherein the substrate composition is 3.0% C, 1.2% Si, 0.5% Mn, 0.3% P, 0.06% S, 0.1% Mo, 0.1% Ni and 0.4% Cr, the remainder being Fe.
Claim 10
Dependent Claim
32 words
A roller according to claim 2 wherein the substrate composition is 3.0% C, 1.2% Si, 0.5% Mn, 0.3% P, 0.06% S, 0.1% Mo, 0.1% Ni and 0.4% Cr, the remainder being Fe.
Claim 11
Dependent Claim
27 words
A roller according to claim 1 wherein the substrate composition is 0.74% C, 0.36% Si, 0.76% Mn, 0.012% P, 0.019% S, 0.28% Mo, the remainder being Fe.
Claim 12
Dependent Claim
27 words
A roller according to claim 2 wherein the substrate composition is 0.74% C, 0.36% Si, 0.76% Mn, 0.012% P, 0.019% S, 0.28% Mn, the remainder being Fe.
Claim 13
Dependent Claim
11 words
A roller according to claim 2 wherein said member is W.
Claim 14
Dependent Claim
11 words
A roller according to claim 2 wherein said member is Ni.
Claim 15
Dependent Claim
11 words
A roller according to claim 2 wherein said member is Co.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |