37results about How to "Excellent welding characteristics" patented technology

A polyamide resin composition for molded articles to be in contact with high-pressure hydrogen, the polyamide resin composition comprising a blend of a polyamide-6 resin (A) and a polyamide resin (B) which has a melting point, as determined by DSC, that is not higher than the temperature which is higher by 20oC than the melting point of the polyamide-6 resin (A) and which has a crystallization temperature during cooling, as determined by DSC, that is higher than the crystallization temperature during cooling of the polyamide-6 resin (A), the amount of the polyamide resin (B) being 0.01-5 parts by weight per 100 parts by weight of the polyamide-6 resin (A). The polyamide resin composition can give a molded article which, even when high-pressure hydrogen charging and pressure release are repeated, is inhibited from developing flaws and which has excellent weld properties.

The invention provides a piping for refrigeration, a production method and application. The piping for refrigeration is compounded from a plurality of metal layers, wherein the metal layers comprise a metal base layer, a side wall formed on the metal base layer and at least one copper cover layer used for being welded with an external part. The piping for refrigeration provided by the invention can totally replace the composite structure of a piping and a connecting piece of the conventional refrigeration device, so that the welding procedure is greatly decreased, and the welding cost is reduced.

The invention relates to a laser repairing method for allowing the roller surface of a hot roller to have good thermal hardness after repairing. A transitional alloy layer, an intermediate alloy layer and a surface alloy layer are arranged on the surface of the hot roller in a laser cladding mode from inside one by one. The alloy powder adopted by the transitional alloy layer comprises, by mass, 0.21%-0.31% of C, 3.2%-3.6% of Si, 1.0%-1.1% of B, 2.2%-2.6% of Fe, 7%-8% of Cr and the balance Ni. The alloy powder adopted by the intermediate alloy layer comprises, by mass, 0.4%-0.5% of C, 3.8%-4.3% of Si, 11.2%-11.93% of B, 2.5%-3.2% of Fe, 10%-12% of Cr and the balance Ni. The alloy powder adopted by the surface alloy layer comprises, by mass, 0.05%-0.1% of C, 3.2%-3.6% of Si, 2%-4% of Fe, 16%-19% of Cr, 27%-30% of Mo and the balance Co. The surface of the hot roller repaired by using the laser repairing method for the hot roller has good abrasion resistance, corrosion resistance and thermal hardness, toughness and strength are taken into account in the interior, and the effect of laser cladding is good.

The present invention provides a secondary battery including an electrode assembly comprising positive and negative electrodes with a separator interposed therebetween and wound together, a case, a cap assembly, and a negative current collecting plate. The negative current collecting plate includes a partially surface-treated region for fixing the negative current collecting plate to the negative electrode. The partially surface-treated region comprises a metal other than the metal of the negative current collecting plate. The use of a metal other than the metal of the negative current collecting plate provides an improved weld between the negative current collecting plate and the negative electrode which in turn provides improved battery performance, especially for high-load batteries.

The present invention relates to a low roller deformation hot roller laser repair method, wherein a transition alloy layer, an intermediate alloy layer and a surface alloy layer are sequentially subjected to laser cladding on the surface of a hot roller from the inner layer, the components of the alley powder used by the transition alloy layer comprise, by mass, 0.2-0.3% of C, 3.2-3.6% of Si, 1.2-1.8% of B, 2.2-2.6% of Fe, 7-8% of Cr and the balance of Ni, the components of the alley powder used by the intermediate alloy layer comprise, by mass, 0.4-0.5% of C, 3.8-4.3% of Si, 12-13% of B, 2.5-3.2% of Fe, 10-12% of Cr and the balance of Ni, and the components of the alley powder used by the surface alloy layer comprise, by mass, 0.05-0.1% of C, 3.0-3.16% of Si, 2-4% of Fe, 16-19% of Cr, 27-30% of Mo, and the balance of Co. According to the present invention, the hot roller repaired by using the hot roller laser repair method of the present invention has good abrasion resistance, good corrosion resistance and good thermal rigidity of the surface, has good toughness and good strength of the internal, and has good laser cladding effect.

The invention relates to a hot roller laser restoration method capable of prolonging the service lifetime of a hot roller. A transitional alloy layer, a middle alloy layer and a surface alloy layer are cladded with laser layer by layer from the inside on the surface of the hot roller. Alloy powder adopted by the transitional alloy layer includes components by mass: 0.12-0.19% of C, 3.2-3.6% of Si, 1.2-1.8% of B, 2.2-2.6% of Fe, and 7-8% of Cr, with the balance being Ni. Alloy powder adopted by the middle alloy layer includes components by mass: 0.4-0.5 % of C, 3.8-4.3% of Si, 12-13% of B, 2.5-3.2% of Fe, and 10-12% of Cr, with the balance being Ni. Alloy powder adopted by the surface alloy layer includes components by mass: 0.05-0.1% of C, 3.0-3.16% of Si, 2-4% of Fe, 16-19% of Cr and 27-30% of Mo, with the balance being Co. The surface of the hot roller restored by the method has good wear resistance, corrosion resistance and hot hardness, both toughness and strength of the inside of the hot roller are taken into account, and laser cladding effects are good.

The invention relates to a laser repairing method of a hot roll good in laser cladding effect. The surface of the hot roll is laser-cladded with a transition alloy layer, an intermediate alloy layer and a surface alloy layer from the inside layer by layer; alloy powder adopted by the transition alloy layer comprises, by mass, 0.21-0.31% of C, 3.2-3.6% of Si, 1.0-1.1% of B, 2.2-2.6% of Fe, 7-8% of Cr and the balance Ni; alloy powder adopted by the intermediate alloy layer comprises, by mass, 0.4-0.5% of C, 3.8-4.3% of Si, 11.2-11.93% of B, 2.5-3.2% of Fe, 10-12% of Cr and the balance Ni; and alloy powder adopted by the surface alloy layer comprises, by mass, 0.05-0.1% of C, 3.0-3.16% of Si, 2-4% of Fe, 16-19% of Cr, 27-30% of Mo and the balance Co. The hot roll repaired by the laser repairing method of the hot roll good in laser cladding effect has good abrasion resistance, corrosion resistance and hot hardness in surface, integrates toughness and strength inside, and is good in laser cladding effect.

The invention relates to a wrapping cloth storage and transportation trolley and a maintenance method thereof. The wrapping cloth storage and transportation trolley comprises an underframe, a trolley body arranged on the underframe, a push handle arranged on the rear side of the trolley body, a plurality of wrapping cloth pipes which are arranged on the trolley body and distributed in a stepped mode, wrapping cloth clamps arranged at the tail ends of the wrapping cloth pipes, and trundles which are arranged at the four ends of the underframe and provided with brakes. The tail ends of every two adjacent wrapping cloth pipes are connected through an inverted L-shaped connecting support. The wrapping cloth pipes are distributed in the stepped mode, so that aired wrapping cloth receives sunshine by a larger area, ventilation is facilitated, and the airing effect is remarkably improved. The wrapping cloth pipes are square pipes so that the wrapping cloth pipes and the wrapping cloth clamps can be matched more firmly and reliably. The trundles are arranged at the four ends, and thus transportation of the wrapping cloth is facilitated. The surfaces of the underframe, the trolley body, the push handle, fence assemblies, the wrapping cloth pipes, a lower transverse bracket and the inverted L-shaped connecting supports are coated with Teflon coatings, so that firmness and durability are achieved, dust is not liable to adhere to the surfaces, and cleaning and disinfection are easy.

The invention relates to a sealed distributing and collecting trolley and a maintaining method thereof. The trolley comprises a left side plate assembly, a right side plate assembly, a back plate, a double door assembly and a top cover assembly, wherein the left side plate assembly, the right side plate assembly, the back plate and the double door assembly are arranged on the four sides of a bottom plate assembly, the top cover assembly is arranged on the tops of the left side plate assembly, the right side plate assembly, the back plate and the double door assembly, and a sealed box body is jointly formed by the left side plate assembly, the right side plate assembly, the back plate, the double door assembly and the top cover assembly. The inner side face of the sealed box body is coated with a Teflon coating. Inner partition plates with the height capable of being freely adjusted are arranged in the sealed box body and made of stainless steel with the surface coated with the Teflon coating, dust staining is not likely to happen, and cleaning is easy. Multiple drive wheels connected with a motor driving system are arranged at the bottom of the right side of the bottom plate assembly. Multiple driven wheels are arranged at the bottom of the left side of the bottom plate assembly. A waterproof direct current motor is selected as a motor of the motor driving system, whole trolley cleaning and disinfecting are convenient, sanitation safety of equipment is ensured, the motor is used for driving the sealed distributing and collecting trolley, original manpower driving is replaced, and the labor intensity of medical workers is greatly lowered.