Abstract: A non-contact type hydrostatic linear guide device includes a guide unit having a pair of rail parts on the top surface thereof, and a slide unit having oil pockets in a running surface thereof. A load of the slide unit concentrates on the frame of the guide unit. The slide unit has a stepped leg structure in which projections are disposed in the under surface of a table thereof in bilateral symmetry. The projections contact the top surface of inner projections disposed on the guide unit and the outer side surfaces thereof face the inner surfaces of the wear plates disposed on the guide unit, and wear plates are placed outward in the midway of the under surfaces of the projections as the side surfaces thereof face the both side surfaces of the first recessed part and the third recessed part of the guide unit.

Abstract: A material for use as self-lubricating sliding parts, which consists of a steel containing, by mass, from not less than 0.4% to less than 1.5% of C (carbon), 0.1 to 3.0% of Si, 0.1 to 3.0% of Mn, from inclusive zero to 0.5% of Cr, 0.05 to 3.0% of Ni, 0.3 to 2.0% of Al, 0.3 to 20% in total (Mo+W+V) of at least one element selected from the group consisting of Mo, W (tungsten) and V (vanadium), and 0.05 to 3.0% of Cu, wherein there can be observed graphite particles having an average particle size of not more than 3 ?m in a section of the metal structure of the steel. The steel is also used as piston rings. In the steel, the graphite particles observed in the structural section occupy an area rate of not less than 1% in the overall area of the structural section, and have an average particle size of not more than 3 ?m. The steel may further contain not more than 0.3% of S and/or not more than 0.01% of Ca. The steel is subjected to nitriding treatment for use.

Abstract: A non-contact type hydrostatic linear guide device includes a guide unit having a pair of rail parts on the top surface thereof, and a slide unit having oil pockets in a running surface thereof. A load of the slide unit concentrates on the frame of the guide unit. The slide unit has a stepped leg structure in which projections are disposed in the under surface of a table thereof in bilateral symmetry. The projections contact the top surface of inner projections disposed on the guide unit and the outer side surfaces thereof face the inner surfaces of the wear plates disposed on the guide unit, and wear plates are placed outward in the midway of the under surfaces of the projections as the side surfaces thereof face the both side surfaces of the first recessed part and the third recessed part of the guide unit.

Abstract: There is provided inexpensive maraging steel having high fatigue strength and maraging steel strip formed by use of the same. The maraging steel having high fatigue strength, consisting essentially, by mass, of not more than 0.008% C, from 0 inclusive but not more than 2.0% Si, from 0 inclusive but not more than 3.0% Mn, not more than 0.010% P, not more than 0.005% S, 12 to 22% Ni, 3.0 to 7.0% Mo, less than 7.0% Co, not more than 0.1% Ti, not more than 2.0% Al, less than 0.005% N, not more than 0.0033% O (oxygen), and the balance substantially Fe, a total amount of (3Si+1.8Mn+Co/3+Mo+2.6Ti+4Al) being in a range of 8.0 to 13.0%.

Abstract: Disclosed is a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrode to the vacuum remelting. The consumable electrode contains not less 5 ppm Mg. Disclosed is also a maraging steel containing, by mass %, at least, from more than zero to less than 10 ppm Mg, less than 10 ppm oxygen, and less than 15 ppm nitrogen. The steel contains also nitride inclusions having a maximum length of not more than 15 &mgr;m and oxide inclusions having a maximum length of not more than 20 &mgr;m. Regarding the oxide inclusions, a content rate of spinel form inclusions having a length of not less than 10 &mgr;m to a total content of the spinel form inclusions having a length of not less than 10 &mgr;m and alumina inclusions having a length of not less than 10 &mgr;m exceeds 0.33 (i.e. 33%).

Abstract: There is provided a steel of working-induced martensitic type steel consisting essentially, by mass, of 0.01 to 0.10% carbon, not more than 3.0% silicon, more than 5.0 but not more than 10.0% manganese, 1.0 to 12.0% nickel, 4 to 18% chromium, at least one kind of 0.1 to 4.0% in total in terms of Mo +1/2 W which at least one kind is selected from the group consisting of molybdenum and tungsten, from 0 inclusive but not more than 5.0% copper, from 0 inclusive but not more than 0.15% nitrogen, not more than 0.10% aluminum, not more than 0.005% oxygen, and the balance substantially iron, “A” value, which is defined by “A”=Ni+0.65Cr+0.98Mo+0.49W+1.05Mn+0.35Si+Cu+12.6(C+N)  (1) with a proviso that any element which is not added is calculated as zero, being in a range of 13 to 27%, said steel containing in austenite a martensite phase of not less than 30 volume % after cold working.

Abstract: There is provided inexpensive maraging steel having high fatigue strength and maraging steel strip formed by use of the same. The maraging steel having high fatigue strength, consisting essentially, by mass, of not more than 0.008% C, from 0 inclusive but not more than 2.0% Si, from 0 inclusive but not more than 3.0% Mn, not more than 0.010% P, not more than 0.005% S, 12 to 22% Ni, 3.0 to 7.0% Mo, less than 7.0% Co, not more than 0.1% Ti, not more than 2.0% Al, less than 0.005% N, not more than 0.0033% O (oxygen), and the balance substantially Fe, a total amount of (3Si+1.8Mn+Co/3+Mo+2.6Ti+4Al) being in a range of 8.0 to 13.0%.