Ascometal

Other

Snr Roulements

Ascometal (societe Anonyme)

Valti Societe Anonyme Pour La Frabrication De Tubes Roulements

Jacques Bellus

Claude Pichard

Daniel Girodin

Gilles Baudry

Gilles Dudragne

Alain Vincent

G&eacute;rard Jacob

Pierre Jolly

Daniel Robat

G&eacute;rard Lormand

Marc Robelet

Gerard Jacob

Gilles Pierson

Gerard Lormand

Daniel Forest

Vincent Jacot

Christian Tomme

Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%&lE;C&lE;1.5%; 0.4%&lE;Mn&lE;1.5%; 0.75%&lE;Si&lE;2.5%, 0.2%&lE;Cr&lE;2%; 0%&lE;Ni&lE;0.5%; 0%&lE;Mo&lE;0.2%; 0%&lE;Al&lE;0.05%; S&lE;0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn&lE;0.75&plus;0.55&times;Si and Mn&lE;2.5&minus;0.8&times;Si. Process for the manufacture of a bearing component.

Steel and process for the manufacture of a component for bearings

Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%&lE;C&lE;1.5%; 0.4%&lE;Mn&lE;1.5%; 0.75%&lE;Si&lE;2.5%; 0.2%&lE;Cr&lE;2%; 0%&lE;Ni&lE;0.5%; 0%&lE;Mo&lE;0.2%; 0%<Al&lE;0.05%; S&lE;0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn&lE;0.75&plus;0.55&times;Si and Mn&lE;2.5&minus;0.8&times;Si. Process for the manufacture of a bearing component.

Process for the manufacture of a component for bearings and its products

Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%.ltoreq.C.ltoreq.1.5%; 0.4%.ltoreq.Mn.ltoreq.1.5%; 0.75%.ltoreq.Si.ltoreq.2.5%; 0.2%.ltoreq.Cr.ltoreq.2%; 0%.ltoreq.Ni.ltoreq.0.5%; 0%.ltoreq.Mo.ltoreq.0.2%; 0%&lt;Al.ltoreq.0.05%; S.ltoreq.0.04%; the balance being iron and impurities resulting from smelting and the composition furthermore satisfying the relationships: Mn.ltoreq.0.75+0.55.times.Si and Mn.ltoreq.2.5-0.8.times.Si. Process for the manufacture of a bearing component.

Steel for bearings

Steel chemical composition of which contains, by weight: 0.1%.ltoreq.C.ltoreq.0.4%; 1%.ltoreq.Mn.ltoreq.1.8%; 0.15%.ltoreq.Si.ltoreq.1.7%; 0%.ltoreq.Ni.ltoreq.1%; 0%.ltoreq.Cr.ltoreq.1.2%; 0%.ltoreq.Mo.ltoreq.0.3%; 0%.ltoreq.V.ltoreq.0.3%; Cu.ltoreq.0.35%; optionally from 0.005% to 0.06% of aluminum, optionally boron in contents of between 0.0005% and 0.01%, optionally between 0.005% and 0.03% of titanium, optionally between 0.005% and 0.06% of niobium, optionally from 0.005% to 0.1% of sulfur, optionally up to 0.007% of calcium, optionally up to 0.03% of tellurium, optionally up to 0.05% of selenium, optionally up to 0.05% of bismuth, optionally up to 0.1% of lead, the balance being iron and impurities resulting from smelting. Process for the manufacture of a forging.

Process for manufacturing a forging

Steel useful for the manufacture of a separable mechanical component, whose chemical composition preferably comprises, by weight: 0.25%.ltoreq.C.ltoreq.0.75%, 0.2%.ltoreq.Si.ltoreq.1.5%, 0.1%.ltoreq.Mn.ltoreq.2%, 0%.ltoreq.Ni.ltoreq.1%, 0%.ltoreq.Cr.ltoreq.1%, 0%.ltoreq.Mo.ltoreq.1%, 0%.ltoreq.Cu.ltoreq.1%, 0%.ltoreq.V.ltoreq.0.2%, 0.02%.ltoreq.S.ltoreq.0.35%, 0.04%.ltoreq.P.ltoreq.0.2%, 0%.ltoreq.Al.ltoreq.0.005%, 0.005%.ltoreq.N.ltoreq.0.02%; optionally at least one element taken from lead, tellurium and selenium in contents of less than 0.1%, the balance being iron and impurities resulting from the smelting, the steel being optionally treated with calcium. Use of the steel for the manufacture of a separable component and component obtained.

Steel for the manufacture of separable mechanical components and

Steel for the manufacture of forgings having a bainitic structure and the mechanical properties of which are: R.sub.p0.2 .gtoreq.800 MPa, R.sub.m .gtoreq.1000 MPa, K.sub.cu .gtoreq.50 J/cm.sup.2 its chemical composition comprising, by weight: 0.05%.ltoreq.C.ltoreq.0.12%, 0.1%.ltoreq.Si.ltoreq.0.45%, 1.01%.ltoreq.Mn.ltoreq.1.8%, 0.15%.ltoreq.Cr .ltoreq.1.15%, 0.06%.ltoreq.Mo.ltoreq.0.12%, Cu.ltoreq.0.30%, Ni.ltoreq.0.30%, 0.01%.ltoreq.Ti.ltoreq.0.04%, 0.005%.ltoreq.Al.ltoreq.0.04%, 0.006%.ltoreq.N.ltoreq.0.013%, 0.0005% 5 B.ltoreq.0.004%, P.ltoreq.0.025%, 0.02%.ltoreq.S.ltoreq.0.1%, 0%.ltoreq.Pb.ltoreq.0.1%, 0%.ltoreq.Te.ltoreq.0.07%, optionally from 0.0002% to 0.002% of calcium, the balance being iron and impurities resulting from the smelting, the chemical composition furthermore satisfying the relationship: 0.2% .ltoreq.Ni+Mo+Cu.ltoreq.0.7%, the uncombined boron content not being less than 0.0005% above 950.degree. C. Process for the manufacture of a forging.

Steel for the manufacture of forging having a bainitic structure and

The invention relates to a method for fabricating a piece of structural steel that includes thermal or thermomechanical treatment steps that could ordinarily lower the fatigue strength and shock and impact resistance of the steel piece. In the method of the invention a workpiece of microalloy steel is fabricated containing the following elements in the mounts indicated and having a bainitic structure:

Method of fabrication of a piece of structural steel, and the steel

Growing community of inventors

Scy-Chazelles, France

Jacques Bellus