Patent classifications
E01B5/02
Method for manufacturing a rail and corresponding rail
A method for manufacturing a rail includes casting a steel to obtain a semi-product. The steel has a composition comprising 0.20%C0.60%, 1.0%Si2.0%, 0.60%Mn 1.60% and 0.5Cr2.2%, optionally 0.01%Mo0.3%, 0.01%V0.30%; the remainder being Fe and impurities. The method also includes hot rolling the semi-product into a hot rolled semi-product having the shape of the rail and comprising a head, with a final rolling temperature T.sub.FRT higher than Ar3; and cooling the head to a cooling stop temperature T.sub.CS between 200 C. and 520 C. The method also includes maintaining the head in a temperature range comprised between 300 C. and 520 C. during a holding time t.sub.hold of at least 12 minutes, and; cooling down the hot rolled semi-product to room temperature to obtain the rail.
Moderate-strength steel rail and production method thereof
A moderate-strength steel rail is provided. The chemical composition of the moderate-strength steel rail in weight percentages includes carbon 0.70-0.90 wt %, silicon 0.08-0.65 wt %, manganese 0.69-1.31 wt %, chromium 0.10-0.25 wt %, phosphorus 0.020 wt %, sulfur 0.020 wt %, and iron 96.85-98.41 wt %. According to a production method for the moderate-strength steel rail of the present invention, the moderate-strength steel rail produced has a rail hardness of 350-370 HB, a wear amount of 0.40 g, a contact fatigue life of 50,000 times, and a 610 mm steel rail waist opening 3.0 mm/400 mm.
Moderate-strength steel rail and production method thereof
A moderate-strength steel rail is provided. The chemical composition of the moderate-strength steel rail in weight percentages includes carbon 0.70-0.90 wt %, silicon 0.08-0.65 wt %, manganese 0.69-1.31 wt %, chromium 0.10-0.25 wt %, phosphorus 0.020 wt %, sulfur 0.020 wt %, and iron 96.85-98.41 wt %. According to a production method for the moderate-strength steel rail of the present invention, the moderate-strength steel rail produced has a rail hardness of 350-370 HB, a wear amount of 0.40 g, a contact fatigue life of 50,000 times, and a 610 mm steel rail waist opening 3.0 mm/400 mm.
Garbage receptacle transport assembly
A garbage receptacle transport assembly includes a pair of first rails that is each attachable to each other to define a first track that extends along a driveway of a residence. A pair of second rails is each attachable to each other to define a second track that can be positioned to extend along a driveway of a residence. A support plate is provided which is slidably retained on the first track and the second track. A garbage receptacle can be placed upon the support plate thereby facilitating the support plate to transport the garbage receptacle along the first track and the second track. A drive unit is attached to the support plate which transports the support plate along each of the first track and the second track to transport the garbage receptacle between a curb side for subsequent collection by a garbage collection agency and a home position.