US3869319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant deposited steel
Assignee: Hitachi Ltd
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Filing: 1973-01-18
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Granted: 1975-03-04
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Expires: 1993-01-18
Abstract
Abstract Hard and wear resistant deposited steel including martensite base and vanadium-carbide dispersed therein with the amount of vanadium of 32 to 40 percent in weight. A method for producing the hard and wear resistant steel, said method comprising steps of compression forming powder materials into a welding rod, melting the rod in a non-oxidizing atmosphere by means of a heat produced by an electric arc discharge, and heat treating the solidified substance thus obtained. The invention further provides a novel use of the steel thus produced.
Inventors
- 👤 Joo Ishihara
- 👤 Hiromi Kagohara
- 👤 Masaichi Nagai
- 👤 Yasushi Ohuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:15
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/3093; B23K35/32; B23K35/327; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12097; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12819; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/12979
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
WEAR RESISTANT STRUCTURE COMPRISING A METAL SUBSTRATE AND A LAYER OF STEEL DEPOSITED THEREON, SAID SHEET CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT, 32 TO 40 PERCENT OF VANADIUM, 2 TO 4 PERCENT OF NICKEL, AND 0.5 TO 3 PERCENT OF MANGANESE, CARBON OF 0.3 TO 0.6 PERCENT HIGHER THAN ONE-FIFTH OF THE VANADIUM CONTENT, AND THE BALANCE BEING IRON AND IMPURITIES ACCOMPANYING THEREWITH, SAID STEEL HAVING VANADIUM-CARBIDE STRUCTURE EDUCED IN A MATRIX MAINLY COMPRISING MARTENSITE.
Claim 2
Dependent Claim
75 words
WEAR RESISTANT STRUCTURE COMPRISING A METAL SUBSTRATE AND A LAYER OF STEEL DEPOSITED THEREON, SAID SHEET CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT, 32 TO 40 PERCENT OF VANADIUM, 2 TO 4 PERCENT OF NICKEL, AND 0.5 TO 3 PERCENT OF MANGANESE, CARBON OF 0.3 TO 0.6 PERCENT HIGHER THAN ONE-FIFTH OF THE VANADIUM CONTENT, AND THE BALANCE BEING IRON AND IMPURITIES ACCOMPANYING THEREWITH, SAID STEEL HAVING VANADIUM-CARBIDE STRUCTURE EDUCED IN A MATRIX MAINLY COMPRISING MARTENSITE.
Claim 3
Dependent Claim
79 words
Wear resistant structure comprising a metal substrate and a layer of steel deposited thereon, said steel including, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, and 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, and chromium less than 0.3 percent, and the balance being iron and impurities accompanying therewith, said steel having vanadium-carbide structure educed in a matrix mainly comprising martensite.
Claim 4
Dependent Claim
79 words
Wear resistant structure comprising a metal substrate and a layer of steel deposited thereon, said steel including, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, and 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, and chromium less than 0.3 percent, and the balance being iron and impurities accompanying therewith, said steel having vanadium-carbide structure educed in a matrix mainly comprising martensite.
Claim 5
Dependent Claim
23 words
Wear resistant structure in accordance with claim 1, in which said impurities include aluminum and calcium, each being less than 0.1 weight percent.
Claim 6
Dependent Claim
23 words
Wear resistant structure in accordance with claim 2, in which said impurities include aluminium and calcium, each being less than 0.1 weight percent.
Claim 7
Dependent Claim
111 words
Wear resistant structure comprising a metal substrate and a steel layer deposited thereon with a thickness more than 1.5 mm, said deposited steel layer having a portion free from the effect of said substrate, said portion consisting essentially of, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, chromium less than 3 percent, and the balance iron and impurities accompanying therewith, said portion further having vanadium-carbide structure educed in a matrix mainly comprising martensite, said substrate having a tenacity higher than that of the deposited steel.
Claim 8
Dependent Claim
111 words
Wear resistant structure comprising a metal substrate and a steel layer deposited thereon with a thickness more than 1.5 mm, said deposited steel layer having a portion free from the effect of said substrate, said portion consisting essentially of, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, chromium less than 3 percent, and the balance iron and impurities accompanying therewith, said portion further having vanadium-carbide structure educed in a matrix mainly comprising martensite, said substrate having a tenacity higher than that of the deposited steel.
Claim 9
Dependent Claim
95 words
A welding rod for producing a wear resistant deposited steel consisting essentially of, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, and the balance iron and impurities accompanying therewith, said welding rod comprising an iron based metal pipe having a wall thickness less than 0.3 mm, said vanadium, nickel, manganese, carbon and iron being filled in powder form in said pipe with a filling rate at least 60 percent.
Claim 10
Dependent Claim
95 words
A welding rod for producing a wear resistant deposited steel consisting essentially of, in weight percent, 32 to 40 percent of vanadium, 2 to 4 percent of nickel, 0.5 to 3 percent of manganese, carbon of 0.3 to 0.6 percent higher than one-fifth of the vanadium content, and the balance iron and impurities accompanying therewith, said welding rod comprising an iron based metal pipe having a wall thickness less than 0.3 mm, said vanadium, nickel, manganese, carbon and iron being filled in powder form in said pipe with a filling rate at least 60 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |