36results about "Workpiece edge portions" patented technology

The application discloses a welding method for improving low-temperature impact toughness of thick plates in a stress relief heat treatment state, which comprises the following steps: processing a groove; symmetrically processing an X-shaped groove on a welding section of a thick steel plate to be welded, wherein the X-shaped groove comprises a central flat part and two inclined parts symmetrically arranged on both sides of the central flat part in a thickness direction; pre-welding; controlling an assembly gap of the tailor-welded thick steel plate to be zero, and adopting tungsten argon arc welding to pre-weld a welding bead on both sides of the groove root of the upper and lower surfaces of the thick steel plate; and welding; adopting submerged-arc welding to weld and fill the groove on both sides of the upper and lower surfaces of the thick steel plate containing the pre-welding bead. The welding method for improving low-temperature impact toughness of thick plates in a stress relief heat treatment state can effectively improve the low-temperature impact toughness of the weld.

A scraper (60) or cleaner tip for a belt (11) of a conveyor belt machine (10) has a holding body (62) made of a first metal or alloy material. The holding body is configured or adapted for connecting to a mounting assembly (20) of the conveyor belt machine. The scraper also has a scraper element (64) joined to the holding body. The scraper element is configured or adapted for scraping from the belt any conveyed material (12) which has adhered to the belt. The scraper element has a single tungsten carbide blade (70) joined by brazing to a backing strip (66). The backing strip is made of a second metal or alloy material which is the same or similar in its thermal properties to the first metal or alloy material of the holding body. The backing strip of the so assembled scraper element (64) is then joined to the holding body. The scraper provided hereby is such that the single tungsten carbide blade extends substantially the length of the holding body.

The application discloses a thick plate welding method with good low-temperature impact toughness in a stress relief annealing state, which comprises the following steps: processing a groove; symmetrically processing an X-shaped groove on a welding section of a thick steel plate to be welded, the X-shaped groove comprising a central flat part and two inclined parts symmetrically arranged on both sides of the central flat part in a thickness direction; and welding; controlling an assembly gap of the tailor-welded thick steel plate to be zero, and adopting five-wire submerged arc welding to perform single-pass welding on upper and lower surfaces of the thick steel plate respectively. The welding method adopts high-efficiency five-wire submerged arc welding, and through reasonable setting of angles of welding guns and polarities of power sources, reasonable matching of welding materials and process parameter windows, cooperation of an optimized groove form and the process parameter window, and the like, low-temperature impact toughness of a weld after stress relief annealing heat treatment is avoided from greatly decreasing.

This invention relates to a tungsten inert gas (TIG) welding process and joint for 2507 super duplex stainless steel pipes. The method includes: pre-welding the base material bevel by machining and grinding with a stainless steel grinding wheel; selecting GTS-2594 special welding wire and high-purity argon gas; setting the welding current, arc voltage, and welding speed for multi-layer, multi-pass TIG welding according to the base material wall thickness, and controlling the welding heat input within 5.1-22 KJ / cm; strictly controlling the interpass temperature below 100℃ during welding; and conducting a comprehensive inspection after welding, including mechanical properties, macroscopic metallography, microstructure, and ferrite content. This invention, through precise control of the welding thermal process, can suppress harmful phases and stabilize the weld ferrite content within the ideal range of 30%-70%, resulting in a high-quality welded joint with excellent mechanical properties and good corrosion resistance. It is particularly suitable for welding 2507 super duplex stainless steel pipes in harsh environments such as ship desulfurization systems.

The application discloses a K-shaped groove for laser and arc hybrid welding of a large plate and a welding method, belongs to the technical field of welding manufacturing and structural connection, and is composed of a first base material and a second base material. The first base material is provided with a groove. The groove comprises a straight edge and a first bevel located on both sides of the straight edge. A single-sided groove angle alpha is formed between the straight edge and the first bevel. The second base material is provided with a blunt edge. The blunt edge comprises a square edge and a second bevel located on both sides of the square edge. An outer side groove angle alpha0 is formed between the second bevel and the straight line part of the square edge. The application can expand the natural tolerance of the assembly gap g and the misalignment amount h from the source by systematic design and parameter coupling of the cross-sectional geometry of the K-shaped groove, so that the laser-arc hybrid welding can stably form a dense joint with a deep and narrow main molten core and a side wall filling area in the large plate scene, thereby improving the stability of the large plate welding.

Semiconductor component (300) with: a case (308); a substrate inside the housing (308); a first and a second semiconductor circuit on the substrate; and a first planar connection (302A) and a second planar connection (302B), wherein the second planar connection (302B) has a contact section, a main section and an offset section with an offset, wherein the contact section is offset relative to the main section by the offset of the offset section, the first planar terminal (302A) is electrically connected to the first semiconductor circuit, the contact section of the second planar terminal (302B) is electrically connected to the second semiconductor circuit, the first planar connection (302A) and the main section of the second planar connection (302B) are stacked on top of each other in the opposite direction to the direction of the offset of the offset section of the second planar connection (302B) such that the main section of the second planar connection (302B) lies on the first planar connection (302A), the first planar connection (302A) and the main section of the second planar connection (302B) each extend from the housing (308); the first and second semiconductor circuits are arranged in a common plane on the substrate, and the semiconductor device (300) further exhibits the following: a first busbar (304A) adjacent to the first semiconductor circuit, wherein the first planar terminal (302A) is adjacent to the first busbar (304A); and a second busbar (304B) adjacent to the second semiconductor circuit, wherein the second planar terminal (302B) is adjacent to the second busbar (304B).

A method for producing a welded steel blank (1) includes providing two precoated sheets (2), each comprising a steel substrate (3) having a precoating (5) on each of its two main faces (4), each sheet (2) comprising, on each main face (4), at a weld edge (14), a removal zone (18) in which the precoating (5) is removed over a removal fraction; and butt welding the sheets (2) using a filler wire (20) so as to create a weld joint (22) having an aluminum content AlWJ comprised between 0.1 wt. % and 1.2 wt. %. The composition of the wire (20) and the proportion of wire (20) added is such that the weld joint (22) has: (a) a quenching factor FTWJ such that FTWJ−0.96FTBM≥0, (b) a nickel content NiWJ≤14−3.4×AlWJ and a chromium content CrWJ≤5−2×AlWJ, where AlWJ is the aluminum content of the weld joint (22).

The application discloses a super-low-temperature welded pipe and a preparation method thereof, and a welding wire and a welding method for the welded pipe. The steel plate of the welded pipe is composed of C: 0.02-0.03%, Si: 0.10-0.40%, Mn: 2.5-4.0%, Al: 0.05-0.10%, P: ≤0.010%, S: ≤0.002%, other alloy elements ≤1.0%, and the balance of Fe, and the total content of the above components is 100%. A kind of super-low-temperature L450M / L485M steel grade straight seam submerged arc welded pipe with low cost, excellent low-temperature toughness and plasticity is manufactured by using a Mn-Ni-Mo welding wire and a straight seam submerged arc welding method of first outer welding and then inner welding. The material and the weld of the welded pipe have good low-temperature toughness, and the safety of the working process is ensured.

The application relates to the technical field of laser welding methods, and provides a laser pressure welding method, which comprises the following steps: superimposing or butting the edges of a first metal workpiece and the edges of a second metal workpiece, so that the edges of the first metal workpiece and the edges of the second metal workpiece form a V-shaped structure; arranging a laser source opposite the abutting position of the V-shaped structure, so that a laser beam is incident on the abutting position of the V-shaped structure; and performing laser welding edge pressing on the abutting position of the V-shaped structure along the extension direction of the superimposition or butt joint of the first metal workpiece and the second metal workpiece. The laser pressure welding method has the advantages that, during welding, the laser beam can be directly incident on the welding area, the light does not need to be reflected on the surface of the metal workpiece, the energy attenuation of the laser beam is avoided, the energy utilization rate is improved, the polarization state of the laser beam and the reflection performance of the metal workpiece are not required, and the universality of the laser pressure welding method is improved.

The present application belongs to the technical field of welding, and particularly relates to a welded joint of a steel piece, a manufacturing method and application. The welded joint comprises two steel plates and a weld seam, the weld seam is arranged at the butt joint part of the two steel plates, the upper and lower retardation angles of the welded joint satisfy a specific relationship, and / or the front, back and narrowest fusion widths of the welded joint satisfy a specific relationship, so that the problem of aluminum enrichment in the weld seam after laser wire filling of the aluminum-silicon hot-formed steel in the prior art can be overcome.

The present application relates to the technical field of welding equipment, and discloses a full-automatic ring seam welding machine for carrier rollers, which comprises a concave table, a supporting frame is arranged at the bottom of the concave table to isolate and support the bottom of the concave table; two machining stations are arranged at the top of the concave table, and track grooves for switching the stations are arranged on the front and back sides of the middle part of the top of the concave table. By increasing and arranging an end part processing mechanism, the mechanism can not only realize accurate butt joint of the center parts on both sides through a synchronous cross seat, ensure coaxial operation of the centering structure and synchronous rotation of the roller body, but also can calibrate the parallelism of the protective end cover through an inner-outer double-layer alignment structure, and the outer alignment seat is used to adhere to the outer side of the protective end cover, and the inner alignment seat is driven by hydraulic transmission to hold the inner side of the protective end cover, so that the inclination deviation of the protective end cover can be corrected reliably through the inner-outer cooperative action, and the parallelism between the inner and outer sides of the protective end cover and the end surface of the roller body is ensured.

The application discloses a kind of Q550D high-strength steel flat-position robot automatic welding methods, comprising the following steps: (1) carry out welding groove processing, do not leave blunt edge, and the gap of groove root is 1-3mm;(2) using solid argon-rich gas shielded welding to carry out backing layer welding;(3) using flux-cored wire CO2 gas shielded welding to carry out filling layer welding;(4) using flux-cored wire CO2 gas shielded robot automatic welding to carry out cover layer welding.The application solves the welding problem of single-sided welding double-sided forming butt joint weld under the condition of not sticking backing pad and not cleaning root, and can effectively guarantee the first-time flaw detection pass rate of butt joint weld;Using the robot automatic welding method filled with flux-cored wire shielded welding to fill or cover welding, the welding process has high degree of automation, and the appearance of weld after welding is uniformly and beautifully formed;The weld has good strength index and excellent low-temperature impact toughness index, and meets the anti-impact performance requirements of high-strength level crash barrier.

This invention discloses a repair process applicable to welding defects in high-manganese steel, relating to the field of steel material welding repair technology, including the following steps: Step S1: Obtain the high-manganese steel base material to be repaired and identify the existing welding defects; Step S2: Remove the welding defects using carbon arc gouging to generate a bevel; Step S3: Perform mechanical grinding on the bevel to remove the oxide and carburized layers on the bevel surface, and determine the target grinding bevel; Step S4: Obtain high-manganese welding electrodes, and under controlled interpass temperature conditions, use high-manganese welding electrodes to sequentially perform root pass welding and fill pass welding on the target grinding bevel to generate a repaired welded joint. This invention can effectively remove welding defects, and the repaired welded joint is free of cracks, lack of fusion, and other defects. Radiographic testing meets the Class I requirements of NB47013 standard, and the impact energy KV2 of the weld and heat-affected zone is ≥47J at an extreme low temperature of -196℃, the tensile strength Rm is ≥680MPa, and the bending performance is qualified.

The full-position girth welding method of the metallurgical composite pipe specifically comprises the following steps: step 1, selecting two metallurgical composite pipes and processing X-type grooves at pipe ends of the two pipes; step 2, moving the grooves of the two pipes to be opposite to each other to complete the alignment of the two pipes; step 3, using MIG welding process to perform single-layer single-pass girth welding on the inner base layer carbon steel at the joint; step 4, using MAG welding process to perform multi-layer multi-pass girth welding on the outer base layer carbon steel at the joint; and step 5, after the inner and outer base layer welding is completed, using DHTIG welding process to perform single-layer single-pass girth welding on the transition layer at the interface between the cladding layer and the base layer at the joint, and performing multi-layer multi-pass girth welding on the cladding layer. The present application solves the problems of dilution of the cladding layer weld and easy occurrence of reheat stress cracks in the base layer weld in the prior art, and also avoids the influence of the decrease in corrosion resistance of the cladding layer caused by heat accumulation during base layer welding.

This application relates to a weld cladding device and method for stainless steel composite plates, comprising a support container, a flow control mechanism, and a quantitative coating mechanism. The support container holds molten material; the flow control mechanism is located inside the support container and controls the flow of molten material from the outlet of the support container; the quantitative coating mechanism is located inside the support container and between the flow control mechanism and the outlet of the support container, and is used to quantitatively obtain the molten material flowing from the flow control mechanism and coat the molten material onto the surface of the workpiece. By independently heating and containing the molten material in the support container, the heat source is separated from the workpiece, thus preventing the heat source from burning through the workpiece; the quantitative coating mechanism, in conjunction with the flow control mechanism, quantitatively coats the molten material onto the surface of the workpiece, thereby precisely controlling the amount of molten material flowing into the workpiece surface and ensuring stable welding results.

The present invention relates to the technical field of building panels. A structural tube panel and a manufacturing method are disclosed. The structural tube panel comprises a structural tube, internal welded parts, and welded plates, wherein each internal welded part comprises a support plate and an internal perimeter edge, the internal perimeter edge being formed integrally on the circumference of the support plate, and an outer wall of the internal perimeter edge abutting an inner wall of the structural tube; and wherein an external perimeter edge is formed integrally on each welded plate, a fitting hole is provided on an inner side of the external perimeter edge, the fitting hole abutting an outer wall of the structural tube, the external perimeter edge being welded to the structural tube, and the internal perimeter edge being welded to the structural tube.The structural tube plate and the manufacturing method provided in the present invention solve the problem that the welding area between a structural tube and welding plates of an existing structural tube plate is relatively small, which impairs the overall weld strength of the plate.

The process comprises the following phases: supplying at least one first bar (2) and at least one second bar (3) made of at least one metallic material and extending along relevant longitudinal directions, each provided, at the respective ends, with a first ending surface (4) and with a second ending surface (5); cutting the first bar (2) to obtain at least one reinforcement bar insertable into a relevant window / door frame profiled element and a residual bar (7) provided with the second ending surface (5); positioning the second bar (3) aligned with residual bar (7) with the first ending surface (4) of the second bar (3) facing the second ending surface (5) of the residual bar (7); joining by means of resistance butt welding of said second bar (3) and of said residual bar (7) carried out by means of the flow of current through the ending surfaces (4, 5) facing each other; wherein, prior to the phase of joining, the process comprises at least one phase of machining at least one of the ending surfaces (4, 5) carried out by removal of metallic material to obtain at least one machined surface (16a, 16b) and at least one protruding portion (18), partly defining the ending surface (4, 5) and protruding from the machined surface (16a, 16b) and wherein the phase of joining is carried out by means of the flow of current through the protruding portion (18).

This invention relates to the field of ship dredging equipment technology and discloses a welding process for steel pile marking lines, comprising: S1: machining grooves on a plate; S2: welding an isolation layer weld on the bottom and sides of the groove; S3: welding a cover layer weld on the isolation layer weld; S4: grinding the weld to form a marking line; S5: rolling, assembling, and welding the plate with the marking line facing outwards to form a steel pile, wherein the marking line is ring-shaped and encircles the outer perimeter of the steel pile. This invention, by machining grooves and welding marking lines before rolling and welding the plate to form the steel pile, reduces the labor intensity of the marking line welding operation, increases welding efficiency, reduces the number of weld joints, and ensures stable and reliable welding quality. Furthermore, the isolation layer weld reduces the migration of carbon elements from the steel pile plate to the cover layer weld of the steel pile marking line, lowers the carbon content of the cover layer weld, and improves the corrosion resistance of the cover layer weld.

The application discloses a liquid heating device, comprising a stainless steel base plate (1), a first surface of the stainless steel base plate (1) is provided with a thick film resistance heating layer (4), and a second surface of the stainless steel base plate (1) is fixedly connected with an aluminum pipe (2). At least one section of the aluminum pipe (2) is flattened into a flat section, and the flat section is metallurgically combined with the second surface of the stainless steel base plate (1) through an Al-Si brazing layer (3). The microstructure of the brazing layer (3) sequentially comprises an Al-Si eutectic layer (thickness 80-200 microns, lambda 2=15-35 microns) and an Al-Fe-Si intermetallic compound transition layer (thickness 5-15 microns, main phase Al 13 Fe4+secondary phase Al3Fe, and Fe content is continuously gradient distributed from 2wt% on the aluminum pipe side to 80wt% on the stainless steel side). The application forms a metallurgical combined layer with high strength (shear strength >=60MPa), high airtightness (leakage rate <=1*10 ‑8 Pa·m 3 / s) and excellent thermal stability (>=1000 times of 10-95 DEG C cold-hot cycle without cracking) between the aluminum pipe and the stainless steel base plate in the liquid heating device by controlling the double-layer microstructure of the brazing layer, solves the technical problems of low connection strength and poor reliability of dissimilar metals, and can be mass produced (good product rate >=98%).

The application discloses a kind of thick plate high-efficiency welding methods suitable for stress relief heat treatment, it includes the following steps: processing groove: symmetric X-shaped groove is processed on the welding section of thick steel plate to be welded, the X-shaped groove includes central flat portion, and two inclined portions are arranged on the both sides of central flat portion in thickness direction and symmetric;Welding: the assembly gap of the butt-welded thick steel plate is controlled to be zero, and four-wire submerged arc welding is used to carry out single-pass welding on the upper and lower surfaces of thick steel plate respectively.The welding method disclosed in the application can effectively improve the stress relief heat treatment adaptability of weld by using four-wire submerged arc welding method, reasonable setting of power polarity and each welding torch angle, matching of specific groove form, process parameter window and welding material, while improving high-efficiency welding with large heat input, the low-temperature impact toughness of weld after stress relief heat treatment is avoided to be greatly reduced.

The application discloses a heavy plate large heat input welding method capable of stress relief annealing, which comprises the following steps: processing a groove; symmetrically processing an X-shaped groove on a welding section of a thick steel plate to be welded, the X-shaped groove comprising a central flat part and two inclined parts symmetrically arranged on both sides of the central flat part in the thickness direction; and welding; controlling the assembly gap of the tailor-welded thick steel plate to be zero and adopting double-wire submerged arc welding to perform single-pass welding on the upper and lower surfaces of the thick steel plate respectively. The welding method can effectively improve the stress relief heat treatment adaptability of the weld by adopting the double-wire submerged arc welding method, reasonably setting the power polarity and the angles of the welding guns, matching the specific groove form, the process parameter window and the welding material, thereby improving the large heat input efficient welding and avoiding the large decrease of the low-temperature impact toughness of the weld after the stress relief heat treatment.

The utility model relates to wind generating set tower drum technical field especially relates to a spiral steel pipe straight pipe and conical pipe combined tower drum, including wind power base, straight pipe tower drum, conical pipe tower drum and connecting flange, straight pipe tower drum sets up in the upper end of wind power base, straight pipe tower drum is provided with multiple groups, multiple straight pipe tower drums are linear arrangement evenly up and down, and the side wall of straight pipe tower drum is provided with weld joint, and the weld joint is helical distribution, and the conical pipe tower drum sets up in the upper end of the uppermost straight pipe tower drum, and both ends of conical pipe tower drum and straight pipe tower drum are provided with connecting flange, the utility model discloses a straight pipe tower drum and conical pipe tower drum combination use constitute integral wind power tower drum structure, can effectively improve production efficiency, reduce production cost while guaranteeing tower drum structure stability, and the weld joint of straight pipe tower drum periphery helical can effectively strengthen the torsional property of straight pipe tower drum, can avoid the stress concentration under the alternating load of traditional straight seam welding simultaneously, improves the overall strength of tower drum structure.

The utility model discloses a main helium fan copper bar welding structure, and relates to the technical field of main helium fans. The main helium fan copper bar welding structure comprises an end ring and a rotor copper bar, an assembly groove is formed in the end face of the end ring, and a welding flux groove and a positioning table located on one side of the welding flux groove are arranged on the bottom face of the assembly groove; one end of the rotor copper bar is arranged in the assembling groove and is positioned on the positioning table, an annular welding flux space communicated with the welding flux groove is formed between the rotor copper bar and the side face of the assembling groove, and the welding flux space and the welding flux groove are filled with welding flux used for welding the end ring and the rotor copper bar together. According to the main helium fan copper bar welding structure provided by the embodiment of the invention, during welding, the welding flux can fully fill the welding flux space and the welding flux groove after the welding flux is melted, so that the side surface and the end surface of the rotor copper bar are firmly combined with the end ring through the welding flux, and the connection strength between the rotor copper bar and the end ring is enhanced; and the problem that the root of the connection between the rotor copper bar and the end ring is broken due to insufficient connection strength of a traditional welding structure is avoided.

To provide a joint structure which can inhibit reduction of joint strength even when a brass which contains bismuth (Bi) in place of lead and stainless steel are brazed with a brazing material, and to provide a manufacturing method of the joint structure.SOLUTION: A joint structure in which a stainless member and a brass member are brazed, includes a layer structure in which the stainless member, a first brazing material layer, a Bi barrier layer, a second brazing material layer, and the brass member are sequentially arranged in a laminar manner. The brass member contains Bi, and the Bi barrier layer inhibits Bi in the brass member from being moved to the first brazing material layer by brazing of the stainless member and the brass member.SELECTED DRAWING: Figure 1

This application relates to an auxiliary tooling for installing and pressing seams in hydraulic pressure steel pipes. The auxiliary tooling includes a base frame with symmetrically connected guide wheels at the bottom. A working platform is connected to the upper end of the base frame. A set of first uprights and a set of second uprights are connected to the upper end of the working platform. A first positioning plate is installed between the first uprights via an adjustment mechanism, and a second positioning plate is installed between the second uprights via the same adjustment mechanism. A crossbeam runs through both the first and second positioning plates. A support rod is connected to one end of the crossbeam, with the connection point at the center of the support rod. The support rod is vertically positioned, with an electric hydraulic jack at its upper end and a screw jack at its lower end. This application uses the screw jacks and electric hydraulic jacks at both ends of the support rod for pressing seams in pressure steel pipes, which is more flexible, faster, more practical, and has a wider range of applications than existing technologies.

A hybrid construction joint comprising a metal casting (1) and a metal sheet part (3), wherein the metal sheet part (3) has a sheet flange (7) which is welded or brazed to the metal casting (1) via a connecting seam (19) extending over a seam length (l) between the metal casting (1) and the metal sheet part (3), wherein a bead (21) is formed in the metal sheet part (3) parallel to and offset from the connecting seam (19), by means of which component stresses in the metal sheet part (3) can be relieved, which form during the welding or brazing process due to thermal expansion or in the finished hybrid construction joint, so that a transfer of component stresses from the metal sheet part (3) to the metal casting (1) is reduced, characterized in that a flange bead (23) is formed in the sheet flange (7) which relieves component stresses in the metal sheet part (3) during the welding or brazing process.and that the flange groove (23) is completely in material bond with the weld or brazed material (17) after the formation of the joining seam (19).

This invention discloses an aluminum-based coated blank, its preparation method, and an apparatus for preparing the aluminum-based coated blank. In one specific embodiment, the aluminum-based coated blank includes a joint connecting two or more aluminum-based coated steel plates. The aluminum-based coated steel plates include: a base steel plate comprising the following components by weight percentage: carbon (C): 0.01 wt% to 0.5 wt%; silicon (Si): 0.01 wt% to 1.0 wt%; manganese (Mn): 0.5 wt% to 3.0 wt%; phosphorus (P): greater than 0 wt% and less than or equal to 0.05 wt%; sulfur (S): greater than 0 wt% and less than or equal to 0.01 wt%; aluminum (Al): greater than 0 wt% and less than or equal to 0.1 wt%; nitrogen (N): greater than 0 wt% and less than or equal to 0.001 wt%; the balance being iron (Fe) and other unavoidable impurities; and a coating, which is 20 g / m 2 Up to 100g / m 2 The amount of adhesion is formed on at least one side of the base steel plate and includes aluminum (Al).

This invention discloses a double-sided indirect arc welding method, belonging to the field of metal welding technology, suitable for welding scenarios involving single-sided welding of plates with double-sided forming, low deformation, and high efficiency. A TIG electrode is placed on the back of the plate, and a single / double-wire MIG / MAG electrode is placed on the front. The base material is not connected to a power source, and an indirect arc is formed between the two electrodes. After the root pass is completed, the front MIG / MAG welding wire fills the cover pass. This invention achieves high-speed, low-heat-input welding by controlling the bevel angle, butt joint gap, blunt edge size, and matching welding parameters, significantly reducing plate deformation. The TIG arc on the back ensures a smooth weld formation, eliminating the need for secondary grinding; the MIG / MAG arc on the front improves deposition efficiency. This method provides stable welding quality, with no defects such as incomplete penetration, and is suitable for various plates such as carbon steel, stainless steel, and aluminum alloys. It meets the needs of industrial mass production and effectively solves the problems of high heat input, poor weld formation, and low efficiency associated with traditional welding.

This invention provides a refrigerant piping connection structure, refrigerant equipment, and refrigeration cycle system that allow stainless steel refrigerant piping to be brazed to the main unit of the equipment or other piping while reducing the workload. [Solution] In a refrigerant equipment 10a with a piping connection structure, the melting point of the brazing material 17 used for brazing the equipment body 15 to one end 161 of a stainless steel refrigerant pipe 16 is lower than the melting point of the plating layer 18 on the outer peripheral surface 163a of the other end 162 of the refrigerant pipe 16. The end of the second refrigerant pipe is joined to the other end 162 of the first refrigerant pipe, which is the refrigerant pipe 16. The opposing surface of the second refrigerant pipe to the first refrigerant pipe is formed of a metal of the same material or a similar material as the plating layer 18. The brazing material 17 used to braze the one end 161 of the first refrigerant pipe to the equipment body 15 is the first brazing material. The second refrigerant pipe is brazed to the other end 162 of the first refrigerant pipe using the second brazing material, and the melting point of the second brazing material is lower than the melting point of the first brazing material.

An assembly of mechanical components includes a solder joint between two metal components. A mounted component is retained on one side of a support structure by a solder joint on the other side of the support structure between a retainer and a connector that is fast with the mounted component and extends through the support structure. The retainer is of sheet metal construction, so that a height of the solder joint is no more than the thickness of the retainer, thus providing a low-profile joint.