| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 201 | Process for producing crack-free nitride-hardened surface on titanium by laser beams | US843691 | 1992-02-28 | US5290368A | 1994-03-01 | William J. Gavigan; Craig L. Snyder; Frank J. Tufano; Ronald S. Miller |
| A process for producing a crack-free, laser nitride-hardened layer on a titanium substrate, the process including preheating the substrate, melting a small area of substrate with a laser, and shrouding the melted area with a gas mixture having a maximum critical amount of nitrogen not greater than 85%. A crack-free pump shaft so hardened to Rockwell 52 C is produced. | ||||||
| 202 | Method for improving the corrosion resistance of a zirconium-based material by laser beam | US826320 | 1992-01-21 | US5236524A | 1993-08-17 | James C. Rawers; Wayne E. Reitz |
| A method for improving the corrosion resistance of a zirconium-based material in an acid environment. A laser beam is scanned across the entire surface of the material to cause surface melting of the material. A rapid self-quenching is provided by the underlying substrate. Homogeneous material formed during solidification of the molten pool improves the corrosion resistance. Alloy enriched diffuse regions, i.e., tin and iron, develop parallel to each other and the periphery of the edge of the melt pool. In this manner, the laser surface melting removes the intermetalics by dissolving the precipitates, thus removing the source of localized corrosion. This greatly reduces the capability of the iron to act anodically to cause the zirconium to ionize, disassociate from the matrix, and migrate into the acid solution. | ||||||
| 203 | Method of surface hardening titanium and other metals | US353905 | 1989-05-18 | US5145530A | 1992-09-08 | William E. Cassady |
| A method of hardening the surface of titanium and its alloys, and other structural metals which form hard carbides, by treating the surface thereof with a moving, discontinuous carbon arc.The metal surface to be hardened, and a carbon electrode are made opposite poles of an electric current source, and moved and/or rotated with respect to each other so that a multiplicity of discontinuous electric arcs are produced between the carbon electrode and the metal surface.Carbon particles transfer through the arc and alloy within craters of the instantly liquified and chilled substrate, producing a surface layer which, in the case of titanium, is hard and tough and adherent enough to form the working surface of abrasive cutting tools.The process improves the appearance and durability of consumer items and reduces friction and wear on machine parts. | ||||||
| 204 | Process for increasing the transition temperature of metallic superconductors | US693577 | 1991-04-30 | US5123974A | 1992-06-23 | Dominic J. Giancola |
| In one embodiment this invention provides a process for decreasing the resistivity of an electrical conductor.The process involves the application of high temperature and an external field to a conductor to induce a current flow and physicochemical transition in the conducting matrix. | ||||||
| 205 | Process embodiments for improving the electrical properties of conductors | US97175 | 1987-09-16 | US5073209A | 1991-12-17 | Dominic J. Giancola |
| In one embodiment this invention provides a process for decreasing the resistivity of an electrical conductor.The process involves the application of high temperature and an external field to a conductor to induce a current flow and physicochemical transition in the conducting matrix. | ||||||
| 206 | Split memory element | US383233 | 1989-07-19 | US4918919A | 1990-04-24 | William C. McCoy; James E. Small; Gregory Cole |
| A memory element of the present invention is split to minimize the magnitude of electrical current flowing therethrough as the split memory element is being heated to its transitional temperature, thereby permitting the cross-sectional area of the lead wires used to conduct an electric current to the memory element to be minimized. The split memory element includes a tip member and first and second strip members aligned in side-by-side relation. Each of the tip member, first strip member, and second strip member are made of a shape-memory alloy and have a characteristic internal structure. Each strip member includes a shape-memory portion coupled to the tip member, a lead-attachment portion, and partition means for interconnecting the shape-memory and lead-attachment portions. Each partition means has an internal structure which is dissimilar to the characteristic internal structure of the tip member and the first and second strip members so that certain ions originating in the electrically conductive wire lead coupled to the lead-attachment portions are substantially isolated or otherwise contained in the lead-attachment portions to prevent contamination of the shape-memory portions. | ||||||
| 207 | Process for increasing the oxidation resistance and corrosion resistance of a component made of a dispersion strengthened superalloy by a surface treatment | US832899 | 1986-02-26 | US4909859A | 1990-03-20 | Mohamed Nazmy; Hans Rydstad |
| A process for increasing the oxidation resistance and corrosion resistance of a component made of a dispersion strengthened superalloy by means of a surface treatment, the object of which in every case is to produce or retain a fine-grained surface zone (5) while the core zone (4) of the component in all circumstances is forced to form coarse grains during the final recrystallization annealing in the temperature range between the recrystallization temperature and the solidus temperature. A fine-grained surface zone (5) is produced by cold-working the surface zone (3, 5) by shot-peening, surface milling or pressing or by heating the surface zone (7) to a temperature about 100.degree. to 140.degree. C. below the recrystallization temperature by means of a laser (9) or an arc (10) while the core zone is kept at less than 900.degree. C., or by application of a 10 to 50 .mu.m thick nickel layer onto the surface followed by diffusion of the nickel into the surface zone (nickel-rich surface layer 14) of the component at a temperature below the recrystallization temperature. In each case, recrystallization annealing in order to establish coarse grains in the core zone (4) is finally carried out. | ||||||
| 208 | High energy beam thermal processing of alpha zirconium alloys and the resulting articles | US571123 | 1984-01-13 | US4648912A | 1987-03-10 | George P. Sabol; Samuel G. McDonald; John I. Nurminen |
| Described herein are alpha zirconium alloy fabrication methods and resultant products exhibiting improved high temperature, high pressure steam corrosion resistance. The process, according to one aspect of this invention, utilizes a high energy beam thermal treatment to provide a layer of beta treated microstructure on an alpha zirconium alloy intermediate product. The treated product is then alpha worked to final size. According to another aspect of the invention, high energy beam thermal treatment is used to produce an alpha annealed microstructure in a Zircaloy alloy intermediate size or final size component. The resultant products are suitable for use in pressurized water and boiling water reactors. | ||||||
| 209 | Crystal growth in glasses and amorphous semiconductors | US323824 | 1981-11-23 | US4464557A | 1984-08-07 | Subhash H. Risbud; Jainagesh A. Sekhar |
| Crystal growth is effected by laser energy input and direct heating at a glass-crystal interface. The process is based on the use of a laser beam of appropriate wavelength as a means of providing heat to the interface due to transmittance differences between the glass and crystal phases. The process is useful for inducing crystal growth in amorphous semiconductors and oriented crystal growth in ceramic, metallic, and polymeric glasses, and for producing shaped single crystals from preformed glassy shapes. The transmittance differences can be used to provide direct heat and thus drive any two-phase boundary on a microscopic scale. | ||||||
| 210 | Laser shock processing | US378975 | 1982-05-17 | US4401477A | 1983-08-30 | Allan H. Clauer; Barry P. Fairand; Stephen C. Ford; Craig T. Walters |
| An improved method and an apparatus for altering properties in a solid target by using the radiation emitted by a high power pulsed laser to generate a short duration, high amplitude pressure pulse is directed at the front side of solid target to alter material properties. The front side of the solid target is covered with an overlay material that is transparent to laser light, and the back side is placed in direct contact with a trapping material having substantially the same acoustical impedance as the metal substrate. When the solid target is processed by the pulsed laser, the microstructure and the stress state of the target are altered in a predictable manner. | ||||||
| 211 | Method of improving the wear resistance of metals | US212340 | 1980-12-02 | US4352698A | 1982-10-05 | Nicholas E. W. Hartley; Alan Wilcockson; David M. Sutherland, deceased; by The Midland Bank Trust Company Limited, legal representative |
| A process for improving the wear resistance of metals, comprising the operation of implanting into a metal article the wear resistance of which is to be improved ions of a material which is capable of forming within the article oxide compounds having a perovskite-type structure, and terminating the implantation of the ions when a dose of at least 10.sup.15 ions per square centimeter has been implanted.The process may also include an oxidizing stage after the implantation of the ions. Examples of the process are described in which the article is made of a steel and the ions are selected from the group consisting of Y.sup.+, Sc.sup.+, Yb.sup.+, Ce.sup.+, La.sup.+ and Dy.sup.+. | ||||||
| 212 | Explosion method of finishing welded joints | US114554 | 1980-01-23 | US4342609A | 1982-08-03 | Branislav P. Beatovic; Stevan L. Kuzmanovic; Vladimir M. Kudinov; Vladimir G. Petuskov |
| A method is described reducing remaining tensions and corrosion resistance in welded joints by explosion finishing thereof, comprising disposing over the axis of the weld seam an explosive charge in the form of a periodic curve, the axis of which is substantially co-extensive with that of the weld seam with the amplitude thereof extending from one side of said seam to the other, and then detonating said explosive charge. In one embodiment an auxiliary explosure charge is disposed substantially linearly over the axis of the weld seam to assure complete detonation of the charge disposed in the form of a periodic curve and comprising the main charge, and then both charges are simultaneously detonated. | ||||||
| 213 | Surface alloying and heat treating processes | US722965 | 1976-09-13 | US4157923A | 1979-06-12 | Chia M. Yen; Uck I. Chang |
| A method is disclosed for increasing physical properties of a non-allotropic metal article along a beam affected zone. A preferred method comprises passing a high energy beam (of at least 10,000 watts/cm.sup.2 measured at the interface of the beam with the article across a predetermined surface area at a rate to cooperate with the proportioning of the total article mass with respect to the beam affected zone mass to produce a rapid self-quenching rate and thus assure a desired precipitate and/or intermetallic compound in the resolidification zone. The high energy beam is preferably a laser generated by a device having a power level of at least 500 watts. The method requires and facilitates alloying which may be varied in several respects: (a) alloying ingredients may be previously deposited over the beam affected zone so as to be turbulently mixed with melting of the base material in said zone, (b) alloying ingredients may be constituted as a wire and fed into the high energy beam to be contemporaneously melted with the base material, (c) the alloying ingredients are selected as those having an affinity to form intermetallic compounds with the non-alloptropic metal base, such as copper, manganese, chromium, zinc, cobalt, magnesium, molybdenum, titanium, vanadian, tungsten, zirconium, iron and nickel for an aluminum base and silicon as an independent wear resistance particle, and (d) the alloying ingredients are proportioned with respect to the thickness of the melted zone to render a desired alloy concentration after melting to facilitate greater hardness, greater corrosion resistance, or greater fatigue life of the affected surface region of the article. | ||||||
| 214 | Laser annealing | US801666 | 1977-05-31 | US4151014A | 1979-04-24 | Sidney S. Charschan; Edward S. Tice |
| A selected portion of a nonferrous, metallic workpiece, such as a copper or copper alloy workpiece, is annealed to a controlled degree of temper by irradiating the selected portion of the workpiece with a pulsed laser beam, while so regulating a parameter of the pulsed laser beam as to effect the desired, controlled degree of temper. The regulated parameter may be the intensity and/or duration of a laser pulse. | ||||||
| 215 | Method of salvaging and restoring useful properties to used and retired metal articles | US732486 | 1976-10-14 | US4125417A | 1978-11-14 | Kenneth C. Antony |
| A method of salvaging and restoring physical and mechanical properties to hard and brittle cast metal parts which have undergone creep damage is provided which comprises hot isostatically pressing said metal parts at temperatures and pressures sufficient to undo the creep and eliminate creep-induced micro defects. | ||||||
| 216 | Altering material properties | US26579972 | 1972-06-23 | US3850698A | 1974-11-26 | MALLOZZI P; FAIRAND B |
| A method of altering properties in a solid target by attaching securely to its surface a layer of solid or liquid overlay material, and directing a radiation pulse of high power density (as from a laser) to the layer. The thickness of the target plus any overlay that is absorbent to the radiation is at least about two micrometers greater than the mean free path of the radiation therein. The target typically comprises a metal or metal compound having a thermal diffusivity of at least about 0.1 square centimeter per second. The overlay material may be either inert or exothermic, and either transparent or opaque to the radiation. Where it is opaque, it may be covered with a layer of another overlay material.
|
||||||
| 217 | Method for reducing embrittlement condition of metal | US8502370 | 1970-10-29 | US3817849A | 1974-06-18 | BLOSSER R; RICHARD G |
| AN IMPROVED METHOD FOR REDUCING THE CONDITION OF EMBRITTLEMENT IN A METAL SPECIMEN WITH BOTH HEAT AND A NEUTRON FLUX OF SELECTED DENSITY. THE METHOD CONSISTS OF PLACING A METAL SPECIMAN, IN HEATED ENVIRONS AND IN VIEW OF NNEUTRON RADIATION FOR A PREDETERMINED PERIOD OF TIME IN ORDER TO ALLEVIATE ANY EMBRITTLEMENT CONDITION AND/OR TO REDUCE LIKELIHOOD OF SUCH CONDITION AT A LATER TIME, SUCH HEAT/NEUTRON IRRADIATION TENDING TO REARRANGE THE INTERSTITIAL MAKEUP OF THE METAL SPECIMEN E.G., BY BRINGING ABOUT DISSOCIATION OF DIATOMIC OR MOLECULAR HYDROGEN TO ITS MONATOMIC STATE.
|
||||||
| 218 | Process for reconstituting the grain structure of metal surfaces | US3650846D | 1968-11-04 | US3650846A | 1972-03-21 | HOLLAND WILLIAM P; HUESCHEN ROBERT E |
| Surface brittle fracture of metals is inhibited by impinging on the surface of the metal an intense pulsed beam of charged particles, neutral particles or radiation while the metal is maintained at a temperature at least above its nil ductility temperature. Energy from the pulsed beam creates high thermal gradients and concomitant high stresses which in turn effect high plastic strain in the surface region and produce a unique fine subgrain structure on and immediately underneath the surface. The treatment enhances the resistance of the metal surface to brittle fracture and results in decreased cracking, delaminating and grain lifting.
|
||||||
| 219 | Method and apparatus for stress relieving a workpiece by vibration | US3622404D | 1969-02-19 | US3622404A | 1971-11-23 | THOMPSON LEONARD E |
| A method of stress relieving a workpiece by vibrating the workpiece in the frequency range of each resonant peak corresponding to each portion of the workpiece to be stress relieved and maintaining the vibration in the frequency range of each selected resonant peak while the amplitude of the peak increases, the power necessary to produce the peak decreases, and the frequency range decreases until the power necessary to produce the amplitude has substantially stabilized. An apparatus for carrying out the method including a vibrator, an accelerometer and an electric control and monitoring circuit comprising means for indicating the frequency and the amplitude of the vibration impressed on the workpiece and the power needed to produce the amplitude.
|
||||||
| 220 | Process for strengthening alloys | US3615921D | 1968-11-20 | US3615921A | 1971-10-26 | DELGROSSO EUGENE J |
| A process is provided for strengthening stainless steel and titanium alloys by explosive shocking of the alloys at cryogenic temperatures while substantially prohibiting macroscopic deformation. The alloys are preferably subjected to shock wave pressures of 225 to 275 kb. at temperatures of -100* to -200* F.
|
||||||
QQ群二维码
意见反馈
意见反馈