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Cercetări privind procesul de forjare a pieselor forjate de arbore mare cu flanșă intermediară

Introduced the forging process of large shaft forgings with intermediate flanges. A new forging process was determined by designing different forging processes and using the finite element method for numerical simulation analysis and comparison, and good results were achieved. 1. Question raising Large shaft forgings with intermediate flanges are one of the main forgings of certain equipment. Figure 1 shows the rough machined shape of the movable trunnion, which is mainly characterized by a flange in the middle. This article uses the forging shown in Figure 1 as an example to study the process. In the previous production, the forging […]

2023-05-01

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Optimization of Forming Scheme for 1Cr17Ni2 Stainless Steel Bolt Forgings for ……

To solve the problems of poor surface quality, multiple forging processes, and low die life of 1Cr17Ni2 stainless steel bolt forgings for aircraft, the forging process of 1Cr17Ni2 stainless steel bolt forgings for aircraft was studied based on DEFROM numerical simulation software. The results show that by increasing pre-forging, the wear of the forging on the final forging cavity is reduced, and the service life of the die is improved. Using a holding and cutting die for edge cutting ensures the quality of edge cutting, and one-time forging is achieved. The trial production results using the optimized process are in […]

2023-04-01

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Studiul experimental al formării prin laminare a flanșelor cu gât de sudură

A roll forming situation of a weld neck flange is introduced. Through the test rolling of several flange blanks, it is concluded that the flange is challenging to roll forming. Still, it provides a solid basis for the combination of casting and rolling creating to improve the quality of the flange. The method can be used as a reference for the new process of manufacturing weld neck flanges.  Flanges are widely used as pipe coupling parts. The flange is generally produced by casting molding or forging punching. Casting flange internal organization is loose and uneven, strength and quality are difficult […]

2023-03-02

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Probe into the selection of thin-walled stainless steel pipes fittings and sta……

Based on the analysis of the product characteristics of stainless steel pipes, this paper comprehensively analyzes the matters needing attention in the selection of thin-walled stainless steel pipes and pipe fittings. At the same time, it deeply analyzes the domestic development prospects of thin-walled stainless steel materials and the technical problems that need to be solved in the development process. Thin-walled stainless steel pipe and stainless steel pipe fittings as one of the important products of the development of modern material science, because of its own beautiful appearance, and corrosion resistance and durability have greater advantages, belonging to the energy-saving […]

2023-02-02

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Proiectarea de strunjire și fixare a pieselor cu flanșe

In the manufacturing industry of electronic communication equipment, small flange parts are widely used. The traditional single-acting chuck is used for clamping and turning, which is not only inefficient, but also easy to damage the surface of parts. This paper optimizes the processing technology of flange parts by designing the lathe fixture, and improves the processing efficiency and quality of flange parts. 1. Asking questions In the field of electronic communication, small-size flange-type parts are widely used. The structure of a flange part is shown in Figure 1. The flange part is mainly composed of a square base and a […]

2023-01-28

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Cauze de perforare și scurgere a flanșei oarbe a rezervorului de stocare a butanului

There are 8 tanks in the butane plant of the natural gas treatment plant. The tank bottom is 5m high from the ground and of the same size, belonging to the pressure vessel. The storage medium is mixed butane (mixture of n-butane and isobutane) and isobutane (product), which was put into use in March 2008, and is a recycled pressure vessel. The tank parameters are as follows: Inner diameter of tank body: 2400mm; Tank length: 11542mm; Tank volume: 49.50m3; Design pressure: 1.58MPa; Blind flange size: DN50. In October 2008, the whole plant was shut down for internal and external inspection […]

2023-01-10

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Analiza și prevenirea eșecului de Hastelloy C-276 Heat Exchange Tube

Hastelloy C-276 heat exchanger tube in service corrosion failure occurred, the weld area significantly thinned, the weld localized small holes. Through metallographic, scanning electron microscopy, spectral analysis and other means of analysis of the failure of the C-276 welded tube analysis. The analysis results show that only the weld was cold drawn, improper welding process and subsequent imperfect solution treatment is the main reason for the reduction in corrosion resistance of the weld area. Finally, the corresponding preventive measures were proposed. 0. Introduction Hastelloy C-276 material has good corrosion resistance, so it is widely used in chemical pressure vessels [1]. A chemical company […]

2022-12-28

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Studiu privind procesul de tratament termic industrial al oțelului inoxidabil 304

In order to realize the bright heat treatment of 304 stainless steel evaporator, a protective atmosphere is applied to the small mesh belt heating furnace. Through the combination test of several groups of process parameters, the hydrogen flow rate is 4.5-5.0 m3/h and the pressure is 0.2 MPa; Heat treatment temperature 1060 ± 10 ℃; Holding time 6.5 min; The process parameter of mesh belt speed is 180mm/min. The influence of heating temperature and heating time on the structure and performance of evaporator was discussed. Evaporator is an important component of the four major components of refrigeration, low-temperature condensing liquid […]

2022-12-12

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Proiectarea și punerea în aplicare a urmăririi căldurii pentru conductele chimice

Part of the process to the temperature has related aspects of the demand, so it is necessary to use with the heat insulation to transport media, with the heat method usually using electric accompanying heating method and steam pipe accompanying heating method, and the pipeline skin effect with the heat technology is the focus of our introduction in this paper, it belongs to the electric accompanying heating method, this paper focuses on the chemical process pipeline with the heat design for detailed study. According to the characteristics of the transporting carrier, the pipeline is divided into adiabatic, non-adiabatic and heat […]

2022-12-01

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A Comprehensive Guide To Plates Of Middle Thickness: Everything You Need to Kn……

What is medium thick plate? The steel plate is a flat steel which is poured with molten steel and pressed after cooling. Medium-thick plate refers to the steel plate with thickness of 4.5-25.0mm, the thickness of 25.0-100.0mm is called thick plate, and the thickness over 100.0mm is extra thick plate. Medium thickness plate generally has high comprehensive mechanical properties. Mechanical properties required are: strength, plasticity, hardness, impact toughness, stiffness, etc. Process performance requirements are: welding performance, hardenability, processability, weather resistance, corrosion resistance, wear resistance, fatigue resistance, high temperature characteristics, low temperature characteristics. corrosion resistance, wear resistance, fatigue resistance, high temperature […]

2022-11-08

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