38results about How to "Reduce heat treatment requirements" patented technology

The invention relates to a plug-in type balance valve which comprises a valve body, a one-way valve core and a balance valve core, wherein a first oil opening, a second oil opening and a third oil opening are arranged on the valve body; the one-way valve core is arranged at the second oil opening and pushed by a first spring to maintain the trend of axial upward shift; the balance valve core is installed in the valve body and can be matched with a valve opening of the one-way valve core, and a second spring is arranged in a spring cavity of the valve body; the upper part in the balance valve core is provided with an axial passage and a first damping hole; the middle position of the balance valve core is provided with an axial convex shoulder; an annular notch is arranged on the periphery surface of the axial convex shoulder; the inner wall of the valve body is provided with an annular inner shoulder blade; an oil inlet cavity is formed among the annular notch, the inner wall of the valve body and the annular inner shoulder blade; and the third oil opening is communicated with the oil inlet cavity by a second damping hole on the side wall of the valve wall. The balance valve core and the one-way valve core are in an integral structure, and the structure is simple; the balance valve core and the one-way valve core are relatively independent on the relative position relationship, the assembly is convenient, and the requirements on heat treatment and materials of the balance valve core are lowered.

The present invention is a method for producing a wafer comprising, at least, a BMD forming step of subjecting a silicon single crystal in a state of an ingot to heat treatment thereby to form bulk micro defects (BMDs) inside, and a wafer processing step of processing the ingot in which the bulk micro defects (BMDs) was formed into wafers. Thereby, there can be provided a method for producing a wafer, wherein heat treatment for providing IG capability in production of wafer can be shortened and wafers with high IG capability can be produced in large quantity. Also, the present invention can further comprise a wafer heat-treating step of subjecting the processed wafer to heat treatment, or an epitaxial growth step of forming an epitaxial layer on the wafer. Thereby, there is improved productivity of annealed wafers or epitaxial wafers that are excellent in gettering capability.

A method for crystallizing an amorphous semiconductor thin film using a non-metal seed epitaxial growth (NSEG) is provided. The method includes the steps of: forming a pair of non-metal seeds for inducing a crystallization of an amorphous semiconductor thin film at a predetermined distance on a transparent insulation substrate; depositing the amorphous semiconductor thin film on the insulation substrate; and heat-treating the insulation substrate to thereby epitaxially grow a poly-crystalline semiconductor thin film from the non-metal seeds, and to thus crystallize the amorphous semiconductor thin film. In the crystallization method, non-metal seeds are used instead of using crystallization induced metal to thereby epitaxially grow the poly-crystalline semiconductor thin film and to thus realize the amorphous semiconductor thin film without having metal pollution.

A method of induction heat treating the outer surface of articles having an irregular surface shape. The method employs an induction coil that provides a non-planar magnetic field that is adapted to the irregular shape of the article, such that distinct sections of the induction coil produce distinct magnetic fields that are adapted to induce currents in, and thereby provide heat to, distinct sections of the outer surface of the article. The method and induction coil are particularly adapted to provide an induction hardening heat treatment for the outer surfaces of the inner races of Rzeppa-type constant velocity joints.

A method of induction heat-treating certain surfaces of an article comprising a hub and a plurality of trunnions or shafts extending therefrom, wherein the surfaces to be heat-treated comprise the surfaces of the trunnions. The method employs an induction coil that provides a planar magnetic field that is adapted to the irregular shape of the article, such that the induction coil produces magnetic fields that are adapted to induce currents in, and thereby heat, the trunnion surfaces of the article. The method and induction coil are particularly adapted to provide an induction hardening heat treatment for trunnion surfaces of trunnions used in steel spiders of spider or tripod-type constant velocity joints.

A technique for improving cold spray deposition conditions for cold spray additive manufacture of parts involves providing an in-situ temperature feedback controller with a remote instantaneous temperature sensor supplying surface temperature measurements of the deposition surface, and a (preferably long pulse) laser for heating. Temperature feedback allows for control over deposition conditions yielding predictable deposition properties.

The invention relates to a roller and a production process thereof, in particular to the special chilled cast iron roller for a wire rod bar finishing mill rack and the production process thereof. Theroller is prepared from chemical components of an outer layer and a core part. The outer layer is prepared from the chemical components: 3.0 to 3.2 percent of C, 0.4 to 0.60 percent of Si, 0.3 to 0.5percent of Mn, less than or equal to 0.05 percent of P, less than or equal to 0.03 percent of S, 1.25 to 1.45 percent of Cr, 0.3 to 0.5 percent of Mo, 3.0 to 3.5 percent of Ni, 0.1 to 0.3 percent ofV, 0.06 to 0.15 percent of Re, and 0.2 to 0.4 percent of Nb; and the core part is prepared from the chemical components: 3.0 to 3.5 percent of C, 2.2 to 2.60 percent of Si, 0.40 to 0.60 percent of Mn,less than or equal to 0.05 percent of P, less than or equal to 0.03 percent of S, 0.8 to 1.2 percent of Cu, larger than or equal to 0.05 percent of Mg, and the balance Fe and a small amount of residual elements. According to the special chilled cast iron roller for a wire rod bar finishing mill rack and the production process thereof provided by the invention, a traditional advantage of the chilled cast iron roller is fully played, and a carbide morphology and a roller microstructure are improved through optimized component preparation and improvement of a heat treatment process, so that a precious alloy resource is saved, a comprehensive performance of the roller is improved, and a production requirement of a steel rolling enterprise is met with a reasonable cost performance; and the on-machine rolling quantity of the roller is improved by 1.7 times compared with bainite made of a traditional material, and the roller price is only half of the price of high-speed steel.

The invention discloses a simple supporting mechanism provided with two discs. The simple supporting mechanism comprises an inner gear, the left supporting disc and the right supporting disc, wherein the left supporting disc and the right supporting disc are arranged in a center hole of the inner gear and coaxially and fixedly connected. A left supporting bearing and a right supporting bearing are arranged between the left supporting disc and the center hole of the inner gear ring and between the right supporting disc and the center hole of the inner gear ring respectively. A roller of the left supporting bearing and a roller of the right supporting bearing are directly matched with the inner wall of the center hole of the inner gear. The simple supporting mechanism provided with the two discs can bear a large bending moment and a large axial load, the requirement of a precise speed reducer is met, the machining difficulty is lowered, and the manufacturing cost is reduced.

The invention discloses a method for preventing a lock bolt from loosening and a lock bolt assembly. According to the invention, at least one key slot is made on the thread section of a bolt, and a key block is inserted into the key slot, then the bolt is screwed into a nut, thread teeth on the nut are used for extruding the key block to be deformed, a thread in closely matched with the nut is extruded on the key block, and then the thread of the nut can be tightly matched with the thread extruded on the key block to generate a locking force, so as to achieve the aim of preventing the lock bolt from loosening. The method for preventing the lock bolt from loosening and the lock bolt assembly not only have the advantages of being reliable in self-locking, good in strength and light in weight, but also has the advantages of being low in requirements on heat treatment, easy to product, low in production cost, convenient to use and the like.

The invention relates to a double-support pressurizing mechanism, which comprises two symmetric ejector rods connected to two ends of an upper punch. The lower portion of each ejector rod drives a rotatable shifting fork stopper through a cylinder, equal-height support adjusting screw rods are arranged below the shifting fork stoppers, an open rod capable of contacting with each shifting fork stopper is arranged between each cylinder and the shifting fork stopper, and a mechanism for preventing a female die from descending is formed when the two shifting fork stoppers are supported on the support adjusting screw rods. By the aid of a two-side symmetric structure of the double-support pressurizing mechanism, pressure is evenly distributed on the double support adjusting screw rods, main pressing force is decomposed into component force, a pressure stress on the mechanism is decomposed into two smaller pressure stresses, the requirements of part materials and heat treatment are lowered on the premise of meeting functional requirements, and the functions of a single large-sized structure are realized by a structure of a smaller size.

A manufacturing device of a membrane-electrode assembly for a fuel cell is provided. The manufacturing device includes an electrolyte membrane feeding unit forming a first and second ionomer bases impregnated at both surfaces of a reinforcing layer and unwinding an electrolyte membrane wound in a roll type supplied in a predetermined transporting path. A first patterning unit is disposed at a rear side of the electrolyte membrane feeding unit and patterns a first ionomer protrusion pattern layer on the first ionomer base and a second patterning unit is disposed at the rear side of the first patterning unit and patterns a second ionomer protrusion pattern layer on the second ionomer base. A transfer unit is disposed at the rear side of the second patterning unit and couples a catalyst electrode layer on the first and second ionomer protrusion pattern layers by a roll laminating method.