Patent US3615879A successfully refreshed from Google Patents.
US3615879A
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Centrifugal mold for the casting of liquid metal and the process for producing said centrifugal mold
Assignee: Pont a Mousson SA
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Filing: 1968-08-01
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Granted: 1971-10-26
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Expires: 1988-08-01
Abstract
Abstract Centrifugal mold for casting liquid steel. The centrifugal mold is of low-alloy steel selected from the range of air-hardenable steels and having 0.15-0.30 percent of carbon and additions not exceeding 5 percent of the total. This steel has, throughout the thickness of the centrifugal mold, a regular and uniform structure in which at least 60 percent of the carbon is fixed in the form of chromium-and manganese-saturated cementite.
Inventors
- 👤 Eugene Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/10; B22D13/101; C; C22; C22C; C22C38/00; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A centrifugal casting mold as claimed in claim 1, said steel being of a composition selected from the following proportions by weight Carbon 0.15-0.25% Manganese 0.90-1.40% Silicon 0.30-0.40% Chromium 1.00-1.25% Molybdenum 0.30-1.00% Tungsten 0.40-1.00% Vanadium 0.05-0.07%
Claim 2
Dependent Claim
17 words
A centrifugal casting mold as claimed in claim 1, said steel containing 0.30- 0.50 percent of niobium.
Claim 3
Dependent Claim
19 words
A centrifugal casting mold as claimed in claim 1, said steel containing 0.02- 0.05 percent of titanium and zirconium.
Claim 4
Dependent Claim
145 words
A process for producing a mold for casting liquid metal, said steel having throughout the thickness of the mold a regular and uniform structure in which 60- 90 percent of the carbon is fixed in the form of carbides, the remainder of the carbon being combined in the form of chromium- and manganese-saturated cementite, the fineness of the carbides being less than 5 microns and the distance therebetween being about 20- 25 microns, said process comprising starting with a low carbon steel having a composition consisting essentially of by weight Carbon 0.08-0.28% Manganese 0.60-1.40% Silicon 0.20-0.70% Chromium 0.90-1.50% Molybdenum 0.20-1.00% Tungsten 0.10-2.00% Vanadium(0.00-0.10%) 0.10% Iron balance, the total of the additions to the iron not exceeding 5 percent rough machining said mold and subjecting it to a heat treatment of 900* to 950* followed directly by a quenching treatment and thereafter by a tempering treatment.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 5, comprIsing adding 0.50- 1.50 percent by weight of nickel to the said low carbon steel composition.
Claim 6
Dependent Claim
35 words
A process as claimed in claim 5, comprising adding to the said low carbon steel a trace, 0.002-0.004 percent, of boron and a trace, 0.050-0.150 percent, of aluminum to the said low carbon steel composition.
Claim 7
Dependent Claim
21 words
A process as claimed in claim 5, comprising adding 0.30- 0.50 percent of niobium to the said low carbon steel composition.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 5, comprising adding 0.02- 0.05 percent of titanium and zirconium to the said low carbon steel composition.
Claim 9
Dependent Claim
43 words
A process as claimed in claim 5, wherein said steel has the following proportions by weight Carbon 0.15-0.25% Manganese 0.90-1.40% Silicon 0.30-0.40% Chromium 1.00-1.25% Molybdenum 0.30-1.00% Tungsten 0.40-1.00% Vanadium 0.05-0.07% Iron balance, the total of the additions to the iron not exceeding 5%.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |