US2008181807A1PendingUtilityA1
Material with high ballistic protective effect
Est. expiryDec 19, 2021(expired)· nominal 20-yr term from priority
Inventors:Horst Saiger
C22C 38/44C22C 38/40C22C 38/22C22C 38/24F41H 5/0442
30
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Claims
Abstract
A process for making an article with ballistic protective effect and an article obtainable thereby, as well as a method of providing an object with ballistic protection provided by a corresponding material. The alloys used for making the article comprise the elements C, Si, Mn, Cr, Ni, Mo and V within certain concentration ranges and contain a limited amount of impurities. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
Claims
exact text as granted — not AI-modified1 . A process for making an article with ballistic protective effect, wherein the process comprises providing an alloy which comprises, in percent by weight:
Carbon (C)
0.26 to 0.79;
Silicon (Si)
0.2 to 1.2;
Manganese (Mn)
0.2 to 0.9;
Chromium (Cr)
1.1 to 7.94;
Molybdenum (Mo)
0.56 to 3.49;
Vanadium (V)
0.26 to 1.74;
a balance being iron (Fe) as well as accompanying elements and impurities, provided that a total concentration of phosphorus (P) and sulfur (S) is less than 0.025:
P+S<0.025;
a concentration of nickel (Ni) is less than 0.28:
Ni<0.28;
and a total concentration of arsenic (As), antimony (Sb), bismuth (Bi), tin (Sn), zinc (Zn) and boron (B) is less than 0.011:
As+Sb+Bi+Sn+Zn+B<0.011;
and shaping the alloy into said article.
2 . The process of claim 1 , wherein the alloy comprises one or more of C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.36 to 0.64;
Si
0.36 to 0.9;
Mn
0.36 to 0.7;
Cr
1.7 to 5.95;
Mo
1.05 to 2.9;
V
0.36 to 1.25.
3 . The process of claim 1 , wherein the alloy comprises one or more of C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.41 to 0.58;
Si
0.41 to 0.68;
Mn
0.41 to 0.59;
Cr
2.61 to 5.2;
Mo
1.3 to 2.7;
V
0.39 to 0.83.
4 . The process of claim 2 , wherein the alloy comprises one or more of C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.41 to 0.58;
Si
0.41 to 0.68;
Mn
0.41 to 0.59;
Cr
2.61 to 5.2;
Mo
1.3 to 2.7;
V
0.39 to 0.83.
5 . The process of claim 2 , wherein a concentration of sulfur in the alloy is less than 0.005 percent by weight.
6 . The process of claim 1 , which further comprises subjecting the alloy to a technology selected from ladle metallurgy, vacuum treatment, vacuum smelting, vacuum arc remelting, electroslag remelting, powder metallurgy or any combination thereof.
7 . The process of claim 4 , which further comprises subjecting the alloy to a technology selected from ladle metallurgy, vacuum treatment, vacuum smelting, vacuum arc remelting, electroslag remelting, powder metallurgy or any combination thereof.
8 . The process of claim 1 , which further comprises subjecting the article to a heat treatment to a strength of higher than 1800 N/mm 2 .
9 . The process of claim 2 , which further comprises subjecting the article to a heat treatment to a strength of higher than 2000 N/mm 2 .
10 . The process of claim 7 , which further comprises subjecting the article to a heat treatment to a strength of higher than 2100 N/mm 2 .
11 . The process of claim 1 , wherein the alloy comprises C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.41 to 0.58;
Si
0.41 to 0.68;
Mn
0.41 to 0.59;
Cr
2.61 to 5.2;
Mo
1.3 to 2.7;
V
0.39 to 0.83;
and wherein the process further comprises subjecting the alloy to a technology selected from ladle metallurgy, vacuum treatment, vacuum smelting, vacuum arc remelting, electroslag remelting, powder metallurgy or any combination thereof, and subjecting the article to a heat treatment to a strength of higher than 2000 N/mm 2 .
12 . The process of claim 11 , wherein the concentration of sulfur in the alloy is less than 0.005 percent by weight.
13 . An article obtainable by the process of claim 1 .
14 . An article obtainable by the process of claim 11 .
15 . An article for providing ballistic protection, wherein the article comprises an alloy which comprises, in percent by weight:
Carbon (C)
0.26 to 0.79;
Silicon (Si)
0.2 to 1.2;
Manganese (Mn)
0.2 to 0.9;
Chromium (Cr)
1.1 to 7.94;
Molybdenum (Mo)
0.56 to 3.49;
Vanadium (V)
0.26 to 1.74;
a balance being iron (Fe) as well as accompanying elements and impurities, provided that a total concentration of phosphorus (P) and sulfur (S) is less than 0.025:
P+S<0.025;
a concentration of nickel (Ni) is less than 0.28:
Ni<0.28;
and a total concentration of arsenic (As), antimony (Sb), bismuth (Bi), tin (Sn), zinc (Zn) and boron (B) is less than 0.011:
As+Sb+Bi+Sn+Zn+B<0.011;
and wherein the article has a strength of higher than 1800 N/mm 2 .
16 . The article of claim 15 , wherein the article has a toughness at room temperature of higher than SEP 150 J.
17 . The article of claim 16 , wherein the article has a strength of higher than 2000 N/mm 2 .
18 . The article of claim 17 , wherein the article has a toughness at room temperature of higher than SEP 185 J.
19 . The article of claim 18 , wherein the article has a strength of higher than 2100 N/mm 2 .
20 . The article of claim 19 , wherein the article has a toughness at room temperature of higher than SEP 245 J.
21 . The article of claim 16 , wherein the article comprises a plate.
22 . The article of claim 21 , wherein the plate has a thickness of at least 5 mm.
23 . The article of claim 17 , wherein the alloy comprises one or more of C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.36 to 0.64;
Si
0.36 to 0.9;
Mn
0.36 to 0.7;
Cr
1.7 to 5.95;
Mo
1.05 to 2.9;
V
0.36 to 1.25.
24 . The article of claim 19 , wherein the alloy comprises one or more of C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.41 to 0.58;
Si
0.41 to 0.68;
Mn
0.41 to 0.59;
Cr
2.61 to 5.2;
Mo
1.3 to 2.7;
V
0.39 to 0.83.
25 . The article of claim 20 in a form of a plate having a thickness of at least 5 mm, wherein the alloy comprises C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.41 to 0.58;
Si
0.41 to 0.68;
Mn
0.41 to 0.59;
Cr
2.61 to 5.2;
Mo
1.3 to 2.7;
V
0.39 to 0.83;
and wherein the alloy has been subjected to a technology selected from ladle metallurgy, vacuum treatment, vacuum smelting, vacuum arc remelting, electroslag remelting, powder metallurgy or any combination thereof.
26 . A method of providing an object with ballistic protection, comprising covering at least one of the surfaces of the object with a material of an alloy which comprises, in percent by weight:
Carbon (C)
0.26 to 0.79;
Silicon (Si)
0.2 to 1.2;
Manganese (Mn)
0.2 to 0.9;
Chromium (Cr)
1.1 to 7.94;
Molybdenum (Mo)
0.56 to 3.49;
Vanadium (V)
0.26 to 1.74;
a balance being iron (Fe) as well as accompanying elements and impurities, provided that a total concentration of phosphorus (P) and sulfur (S) is less than 0.025:
P+S<0.025;
a concentration of nickel (Ni) is less than 0.28:
Ni<0.28;
and a total concentration of arsenic (As), antimony (Sb), bismuth (Bi), tin (Sn), zinc (Zn) and boron (B) is less than 0.011:
As+Sb+Bi+Sn+Zn+B<0.011.
27 . The method of claim 26 , wherein the alloy comprises C, Si, Mn, Cr, Mo, and V in the following concentrations, in percent by weight:
C
0.36 to 0.64;
Si
0.36 to 0.9;
Mn
0.36 to 0.7;
Cr
1.7 to 5.95;
Mo
1.05 to 2.9;
V
0.36 to 1.25.
28 . The method of claim 26 , wherein the alloy has been subjected to a technology selected from ladle metallurgy, vacuum treatment, vacuum smelting, vacuum arc remelting, electroslag remelting, powder metallurgy or any combination thereof.
29 . The method of claim 27 , wherein the material has a strength of higher than 1800 N/mm 2 and a toughness at room temperature of higher than SEP 150 J.
30 . The method of claim 29 , wherein the material has a strength of higher than 2000 N/mm 2 .
31 . The method of claim 30 , wherein the material has a toughness at room temperature of higher than SEP 185 J.Join the waitlist — get patent alerts
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