| Document |
Document Title |
|
7431778 |
The invention relates to case-hardening of a stainless steel article by means of gas including carbon and/or nitrogen, whereby carbon and/or nitrogen atoms diffuse through the surface into the article. The method includes activating the ...
|
|
7422643 |
There is provided an inexpensive rolling element used under high interface pressure such as induction hardened gears, the rolling element being improved in the seizure resistance of its tooth flanks and having a temper hardness of HRC 50...
|
|
7384488 |
A conventional aluminum killed alloy steel for case hardening of gear(s) and/or shaft components consisting of 0.10 to 0.30 weight % Carbon, 0.15 to 0.35 weight % Silicon, 0.8 to 1.5 weight % Chromium, 0.6 to 1.5 weight % Manganese, 0.01...
|
|
7186304 |
A carbo-nitriding process for forming a martensitic stainless steel, which is case hardened and superior corrosion resistance over carburized process, is provided. A process for forming a martensitic stainless steel which is case hardene...
|
|
7112248 |
A vacuum carbonitriding method includes: performing a vacuum carburizing process on an object to be treated (a workpiece) in a heat treating furnace under reduced pressures by supplying a carburizing gas into the furnace that has been he...
|
|
6948247 |
A cylindrical roller bearing or needle roller bearing for use with a rolling raceway surface is subjected to a carbonitriding treatment to produce a layer containing 30 to 80% retained austenite in the vicinity of its surface that contac...
|
|
6846367 |
Disclosed is a method for improving the wear- and corrosion-resistance of a chromium-plated steel substrate by heat-treating the chromium-plated steel substrate under optimum conditions to inhibit a drop in corrosion-resistance of a stee...
|
|
6656293 |
A method for treating a surface of a first component wherein at least a portion of the surface of the first component contacts a surface of a second component. The method includes forming a compound layer at at least a portion of the sur...
|
|
6623567 |
A method for high concentration carburizing and quenching of steel is provided which is carried out by a treatment process including the steps of carbonitriding the steel at temperatures of from about 800 to about 880° C., and subsequen...
|
|
6454880 |
Multi-layer material for die cast tooling component includes a low to medium carbon steel with alloying amounts of vanadium, manganese and molybdenum, quenched to at least 10 Bar and nitrocarburized to achieve a multiple layer structure ...
|
|
6447619 |
High surface pressure resistant steel parts and their producing methods are disclosed. These steel parts are useful as gears, cams, bearings and similar high-strength compact steel articles which are required to have wear resistance and ...
|
|
6406560 |
A method is provided for the thermal treatment of metal workpieces in a gas atmosphere containing nitrogen, in particular for nitrocarburizing iron articles. In order to obtain enhanced resistance to wear and corrosion in the treated wor...
|
|
6328819 |
A method is provided for heat treatment of metal workpieces obtain a substantially uniform nitride layer, even in workpieces comprising high alloy iron articles. The following method steps are provided: a) heating the workpieces to a ...
|
|
6309475 |
For easily producing a toothed material for high-strength gears etc. with a plastic working technique, deformation resistance occurring in plastic working is reduced and stable high precision plastic working is enabled at lower temperatu...
|
|
6258179 |
A carburizing method is described which is capable of dispersing cementite grains in the surface of steel uniformly and finely as not to affect fatigue strength and capable of fining the crystal grains of austenite. To prevent cementite ...
|
|
6248186 |
A ball-and-roller bearing is disclosed having an inner ring, an outer ring arranged on the axis of the inner ring and rotating around the co-axis relative to the inner ring, and a rolling body interposed between the inner ring and the ou...
|
|
6235128 |
The present invention is a unique sequential process for treating carbon and alloy steels to improve resistance to tribological stresses while reducing conventional processing time required to obtain articles having a similar hardness. T...
|
|
6129988 |
The present invention generally describes methods for modifying MCrAlY coatings by using gaseous carburization, gaseous nitriding or gaseous carbonitriding. The modified MCrAlY coatings are useful in thermal barrier coating systems, whic...
|
|
6090225 |
Process for manufacturing a mechanical component made of steel, in which a blank of the steel component is manufactured and a high-temperature carburizing or carbonitriding treatment of at least part of the surface of the blank of the co...
|
|
5916383 |
A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surf...
|
|
5912399 |
A new tungsten compound is formed by reacting ammonium metatungstate with guanidine carbonate. Such a compound can be converted to metallic tungsten, tungsten carbide or oxycarbide, and tungsten nitride or oxynitride. One can also make m...
|
|
5900126 |
An improved magnetic-recording disk and a process for manufacturing magnetic-recording disks are disclosed. A precision cold-rolled authentic stainless steel is the substrate for a magnetic-recording disk. The surface of the substrate ma...
|
|
5810947 |
The adhesive strength and hardness of chromium nitride(CrN) film deposited on SKD 61 tool steel was significantly enhanced by a nitriding process on the surface the tool steel before coating with a CrN film. These nitriding processes inc...
|
|
5785774 |
An endogenerator is provided in which CO and H 2 are generated as primary products of hydrocarbon oxidation. Noble metal catalysts such as platinum (Pt) and particularly rhodium (Rh), are loaded on a porous ceramic support, of example, ...
|
|
5735971 |
Flawless nitrating layers are obtained during the nitro-carburizing of components made from steels which form passive layers in salt baths if these components are first pre-treated in an oxidizing salt melt at 300° to 500° C. prior to ...
|
|
5735375 |
An electromagnetically actuated friction clutch includes a rotatably driven input gear. A rotatable armature is connected to the input gear and includes a friction face and nitrocarburized outer surfaces. A pole piece has a pole face for...
|
|
5714015 |
A nitrocarburization treatment for steel components, such as steel balls or ball bearings is disclosed. In the process, the balls are treated in a nitrocarburizing environment and then reoriented, either inside or outside of that environ...
|
|
5707460 |
Improved corrosion, wear and fatigue resistance is provided for pieces formed of medium alloy, low carbon steel by subjecting the piece to a treatment process which includes a step of carburizing, followed by nitriding. The process is es...
|
|
5702540 |
In order to keep down soot production and to enable every part of the workpiece, including deep concavities to be uniformly carburized by vacuum carburizing, and to enable decreases in the quantities of gas and heat employed, carburizing...
|
|
5669988 |
Object: Prevention of generation of press marks as well as increase of wear resistance at a corrugation tip portion and thereby providing a corrugating roll having a much improved life. Construction: A manufacturing method of a corrugati...
|
|
5580397 |
A carbide and carbonitride surface treatment method for refractory metals is provided, in steps including, heating a part formed of boron, chromium, hafnium, molybdenum, niobium, tantalum, titanium, tungsten or zirconium, or alloys there...
|
|
5571341 |
A process for the thermochemical treatment of thin-walled structural elements made of steel comprising enriching an edge zone of a thin-walled structural element with nitrogen and carbon at 590° to 700° C. to harden the edge zone where...
|
|
5534083 |
A method for processing a reinforcing stainless steel wire--aluminum alloy composite structure, includes carbon nitriding the surface of a stainless steel wire and coating the treated stainless steel wire with an aluminum alloy, and a pr...
|
|
5498299 |
The surface oxidation under carburization temperatures of steels during the carburization with carbon-containing gas mixtures is avoided by heating the steels to the carburization temperature under a nitrogen/hydrogen mixture or pure hyd...
|
|
5456766 |
Process for carbonitriding a steel comprising: 0.75-1.1% by weight of C; up to 1.0% by weight of Si; less than 0.015% by weight of P; up to 0.5% by weight of Mo; up to 1.2% by weight of Mn; 0.5-2% by weight of Cr, th...
|
|
5417774 |
A process for producing low-cost atmospheres suitable for annealing, brazing, and sintering ferrous and non-ferrous metals and alloys, neutral hardening low, medium, and high carbon steels, sintering ceramic powders, and sealing glass to...
|
|
5389161 |
After preliminary treatment of their surfaces, the parts are brought into contact within a solution containing, essentially, protons, phosphate anions and cations chosen from Ca 2 +, Sn 2 + and Mn 2 +. The preliminary treatment results i...
|
|
5348592 |
An improved method for producing substantially moisture- and oxygen-free, nitrogen-hydrogen atmospheres suitable for annealing, hardening, brazing, and sintering ferrous and non-ferrous metals and alloys is disclosed. According to the di...
|
|
5340412 |
An austenitic stainless steel screw having a nitride hard layer on its surface to prevent corrosion on parts of the screw such as a screw head which is in contact with the environment by removing a portion of the nitride hard layer to ex...
|
|
5298090 |
A process for producing low-cost atmospheres suitable for annealing, brazing, and sintering non-ferrous metals and alloys from non-cryogenically produced nitrogen containing up to 5%, residual oxygen is disclosed. According to the proces...
|
|
5288340 |
In order to improve the corrosion resistance, carbonitrided components formed of ferrous material are treated, after an oxidation treatment, with a solution of a heat hardenable organic synthetic resin and heat-treated at 80° to 200° C.
|
|
5284526 |
An integrated two-step process for producing low-cost atmospheres suitable for annealing ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in continuous furnaces f...
|
|
5254183 |
Elements for use as protecting fuel contacting surfaces of a gas turbine engine are protected from carbon deposition by heating the element in a nitrogen containing atmosphere for sufficient time to cause penetration and absorption of ni...
|
|
5252146 |
A process for nitrocarburizing ferrous materials, and the product thereof is described. Material to be treated is packed in a container with a triazine polymer, preferably melone, melem or melam and heated to 500°-900° C. for up to 120...
|
|
5232522 |
A process is disclosed for forming a coating on a substrate. A metal layer is placed onto the substrate either by plasma spray deposition or by applying a metal foil and then subjecting it to rapid omnidirectional compaction. The metal i...
|
|
5154779 |
A method of nitriding an article of refractory-nitride-forming metal or metalloids. A consolidated metal or metalloid article is placed inside a microwave oven and nitrogen containing gas is introduced into the microwave oven. The metal ...
|
|
5143558 |
An integrated continuous/batch furnace system for heat treating metal parts combines a continuous furnace system and a batch furnace system. The continuous furnace system includes a preheat furnace, a rotary carburizing furnace, an equal...
|
|
5102476 |
Components made from steel can be nitrocarburized in cyanate- and cyanide-containing salt baths within relatively short times if the process is carried out at 600° to 700° C. in a first stage and at 560° to 590° C. in a second stage....
|
|
5084116 |
A rolling contact element steel has C: 0.2-0.6 wt %; Si: 0.5-2.0 wt %; Cr: 5.0-8.0 wt %; Mo: 3.0 wt % or less; Mn: 1.6 wt % or less; O: 12 ppm or less; and the balance of Fe and an inevitable impurity. A rolling bearing made of this stee...
|
|
5045126 |
The invention is exclusively concerned with heat treatments before hardening, of metallic pieces, by cementation, carbonitridation and heating. The process concerns the feeding of a non muffle heat treatment furnace with various componen...
|
