Compact strip or thin slab processing of boron/titanium steels
First Claim
1. A method of manufacturing a steel product, comprising:
- providing a steel composition comprising boron and titanium;
casting the steel composition into a slab having a thickness between about 25 and 150 mm, wherein said steel composition and casting parameters for casting the steel composition are selected to produce a cast steel substantially free from cracks or other structural defects, wherein the slab has a cast composition comprising;
about 0.23 to 0.30 wt. % carbon;
about 0.001 to 0.005 wt. % boron, said about 0.001 to 0.005 wt. % boron being free boron;
about 0.010 to 0.050 wt. % titanium;
about 1.15 to 1.50 wt. % manganese;
less than about 0.35 wt. % silicon;
a Ti/N ratio greater than about 2.9;
wherein the amount of each element is provided based upon the total weight of the cast composition; and
wherein said selected casting parameters to produce a cast steel substantially free from cracks or other structural defects comprise casting the steel composition into a slab at a rate of up to about 4.3 m/min.
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Accused Products
Abstract
A method for casting medium carbon, B/Ti steel product using compact strip processing or thin slab casting. The method can include providing a steel composition including boron and titanium and casting the steel composition into a slab having a thickness between about 25 and 150 mm. The slab can have a cast composition including about 0.23 to 0.30 wt. % carbon, about 0.0010 to 0.0050 wt. % boron, about 0.010 to 0.050 wt. % titanium, about 1.15 to 1.50 wt. % manganese, less than 0.35 wt. % silicon and a Ti/N ratio greater than 2.9. The amount of each element is provided based upon the total weight of the steel composition. The steel slab can be free from cracks and significant defects. Furthermore, the steel slab can be used for electric resistance welded (ERW) products.
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Citations
13 Claims
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1. A method of manufacturing a steel product, comprising:
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providing a steel composition comprising boron and titanium; casting the steel composition into a slab having a thickness between about 25 and 150 mm, wherein said steel composition and casting parameters for casting the steel composition are selected to produce a cast steel substantially free from cracks or other structural defects, wherein the slab has a cast composition comprising; about 0.23 to 0.30 wt. % carbon; about 0.001 to 0.005 wt. % boron, said about 0.001 to 0.005 wt. % boron being free boron; about 0.010 to 0.050 wt. % titanium; about 1.15 to 1.50 wt. % manganese; less than about 0.35 wt. % silicon; a Ti/N ratio greater than about 2.9; wherein the amount of each element is provided based upon the total weight of the cast composition; and wherein said selected casting parameters to produce a cast steel substantially free from cracks or other structural defects comprise casting the steel composition into a slab at a rate of up to about 4.3 m/min. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification