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6964712 |
Hardening protection compositions based on substances which form boron glass for partial carburization of metallic components, which contain magnesium-silicon compounds as an additive. These hardening protection compositions can be used ...
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6776854 |
In the partial thermochemical vacuum treatment of metallic workpieces ( 1 ), in particular in the carburization and case hardening of workpieces ( 1 ) of case-hardening steel in a carbon-containing atmosphere, surface regions ( 3, 4, 5, ...
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6458220 |
Steel alloys susceptible to case and core hardening comprise 0.05 to 0.24 weight percent carbon; 15 to 28 weight percent cobalt and 1.5 to 9.5 weight percent in nickel, small percentages of one or more additives: chromium, molybdenum, an...
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6238489 |
A metallic drilling member is surface hardened except at an end portion, because the end portion is masked. The masking is achieved by placing on the end portion a lid which forms a slight gap around the surface being heat treated. Durin...
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6165597 |
A selectively case hardened steel article by low temperature carburization includes a body made of a chromium bearing nickel or ferrous based alloy (for example, stainless steel), a first portion of the body having a first hardness chara...
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6110184 |
An introducer for use in interventional vascular procedures having a sealing mechanism for closure of a puncture site is disclosed. The introducer has a vessel-engaging component and a sealing component thereon. The vessel-engaging compo...
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5785771 |
A method for manufacturing precision gears (10) including an initial step of providing a shaped workpiece (30 S ) defining a plurality of gear teeth (12) and, furthermore, defining a tooth space surface (68) defined by and between adjace...
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4771689 |
An elongated unitary spring armature is disclosed for use in dot matrix printers. The spring armature has an elongated triangular shape with attachment means located adjacent to the base and means for securing the impact tip located adja...
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4693760 |
A process for preventing surface discoloration in orthopedic implants made of titanium and its alloys is disclosed. Such surface discoloration is apt to occur when the orthopedic implants are ion implanted to improve their wear character...
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4664722 |
A method for hardening a selected region of a steel bearing surface of an earth boring bit using the steps of stretching a rubber protector over a seal region to be protected from treatment (the rubber being selected from the group consi...
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4469530 |
To reduce the hardening distortion during the case hardening of large toothed rims or gear wheels formed of steel the toothed rim or the like during cooling thereof, starting from the hardening temperature, is shrunk during the γ/α tra...
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4279528 |
The object of this invention is to improve the performance of the tulip members in the regions of connection or attachment between the petal portions and the adjacent shaft, this result being obtained by simple means. For this purpose, w...
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4165243 |
A powder metallurgical process for producing dense low-alloy ferrous parts having selected carburized surface portions in which a metal powder of the desired composition is briquetted into a shape-retaining preform, the preform is masked...
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4154628 |
A method of quench hardening a gear having a gear rim, a hub, and two rim carrying gear disk includes carburizing the gear and quenching it subsequently in a saline bath, and is improved by releasably covering the perforated disks with p...
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4062702 |
Portions of the surface area of metal workpieces are insulated in thermochemical treatment by covering the areas with a self-adhering textile tape having metal powder embedded in its adhesive layer.
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3994752 |
Methods for controlling the sizes and shapes of fragments produced by ward casings are disclosed.
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3969158 |
A heat treatment of nine percent nickel steel including carburizing, double normalizing, tempering, subcooling and then tempering to provide a steel having useful mechanical properties at extremely low temperatures.
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3873376 |
A method for case-hardening workpieces which is characterized in that certain areas at the workpiece are protected against excessive case-hardening depths by means of a cover body consisting of glass ceramic; for case-hardening transmiss...
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3231433 |
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2821494 |
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2804413 |
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2804412 |
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2528216 |
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2520334 |
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2410060 |
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2398809 |
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2321806 |
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2320872 |
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2275133 |
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1918895 |
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1759690 |
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1459409 |
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RE22346 |
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1072660 |
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1064034 |
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0090075 |
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0051338 |
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