Recently Shipment to Mid Asia Projects

Welding problems and solutions of pure nickel Ni201 plate

In the manufacture of a molten salt production reactor, the core component is a pure nickel NI201 plate with corrosion and high temperature resistance properties, and this process requires the welding of pure nickel materials. The weldability of pure nickel Ni201 is good, equivalent to chromium-nickel austenitic stainless steel, but the liquid weld metal fluidity is poor, its weldability is poor compared to carbon steel, need to develop a suitable welding process specifications to obtain a more good welded joints. In particular, the weld metal thermal cracking and porosity and welding heat-affected zone has a tendency to grain growth, which […]

Recently Shipment to Mid Asia Projects

Welding process of industrial pure nickel pipe

The weldability of pure nickel and its influencing factors were analyzed. Combined with the application in practical work, the welding process of industrial pure nickel pipe is discussed. On the basis of TIG welding, the self-made argon protective cover is used to avoid the serious oxidation of nickel in the high temperature area during welding. At the same time, combined with other protective measures and reasonable welding specifications, the welding quality of nickel pipe is obviously improved. The element nickel has a face-centered cubic lattice, which is characterized by a high melting point, corrosion resistance, high mechanical properties, good processing […]

Recently Shipment to Mid Asia Projects

Welding and quality control of Ni200 pure nickel pipe

By summarizing the physical and chemical properties of Ni200 pure nickel pipe materials, this paper analyzes the weldability and common defects of pure nickel materials, and puts forward the corresponding quality control scheme on this basis, which ensures the smooth implementation of the project and provides a useful reference for similar projects. Industrial pure nickel is an important rare metal, which not only plays an essential role in most alloys as an alloying element, but also plays an important role as an engineering structural material, which is widely used in chemical, pharmaceutical, nuclear, marine and other fields. In particular, pure […]

Recently Shipment to Mid Asia Projects

Cause analysis of cracking of steel pipe in flattening test

In view of the fracture phenomenon of steel pipe made of strip steel in flattening test, the inclusion, grain size, microstructure, fracture and oxygen content of the fracture sample were inspected by XL30 scanning electron microscope and metallographic microscope. The results show that the main reasons for the flattening fracture are the large amount of inclusions and high oxygen content in the steel. For the fracture of steel tubes made of strip steel in the flattening test, the fractured specimens were examined for inclusions, grain size, organization, fracture and oxygen content analysis by using XL30 scanning electron microscope and metallographic […]

Recently Shipment to Mid Asia Projects

Manufacturing problems and technical analysis of pressure vessel head

The manufacturing of pressure vessel heads, influenced by process operation and material characteristics, will produce certain quality problems, such as bulging, cracking and other defects, which seriously reduce the performance of the equipment. Based on this, the article analyzes the problems in the manufacturing of pressure vessel head and proposes relevant technical solutions to the problems. Pressure vessel is a closed equipment to store a certain amount of liquid or gas through pressurized processing to meet the needs of industrial production, daily life and so on. The selection of pressure vessel materials must have stability and meet the work requirements […]

Recently Shipment to Mid Asia Projects

Corrosion failure analysis of UNS S32750 duplex stainless steel hexagon head b……

Duplex stainless steel combines the performance characteristics of ferritic stainless steel and austenitic stainless steel, with excellent corrosion resistance and good overall mechanical properties, and has been more widely used in various fields. An enterprise pump operation 2a (years) after the bolt was found to have corrosion failure, bolt material UNS S32750 duplex stainless steel, the final heat treatment state for the solution treatment. In order to identify the cause of the bolt corrosion failure, to avoid the recurrence of similar failure mode, the author carried out the inspection and analysis. Physical and chemical inspection 1. Macroscopic analysis Figure.1 macroscopic […]

Recently Shipment to Mid Asia Projects

Research on the defects of stainless steel pressure vessel head and handling m……

The article introduces the basic situation of stainless steel pressure vessel head, points out the main characteristics of stainless steel head defects when they occur in terms of processing technology, materials used and defective parts, and deeply analyzes the main causes and treatment methods of stainless steel pressure vessel head defects, puts forward effective strategies to prevent problems of stainless steel pressure vessel head, and puts forward some modification opinions on the existing pressure vessel technical standards in order to promote the improvement of stainless steel pressure vessel head quality and provide reference for pressure vessel manufacturing enterprises. The quality […]

Recently Shipment to Mid Asia Projects

Test on the causes of cracking of welded steel pipe flattening test

Welded steel pipe is a steel pipe that is bent and deformed into a square or round shape by bending the steel plate or strip, and then welded. This kind of steel pipe surface are with seams, the use of billet steel or steel plate mainly. As the welded steel pipe plays a great role in the field of engineering and construction, so the community has been paying great attention to the quality control of steel pipe, and focus on the steel pipe flattening test analysis. The article will focus on the welded steel pipe flattening test cracking causes, expect […]

Recently Shipment to Mid Asia Projects

Study of welding process of UNS NO8810 thick-walled head

This process not only solves the problem of environmental pollution from the exhaust gas of polysilicon production, but also realizes the recycling of silicon tetrachloride and other by-products, which greatly reduces the production cost. This cold hydrogenation reactor is the core equipment for the cold hydrogenation stage of the 5000 tons/year polysilicon project of a photovoltaic material company in Sichuan. The equipment has two units with vertical fixed structure, DN2000×75×18055mm, the main material is UNS NO8810, the total weight of the equipment is 71,880kg, and the whole equipment needs heat treatment after the production. Figure.1 Schematic diagram of cold hydrogenation […]

Recently Shipment to Mid Asia Projects

Analysis of research status on forming processes and quality control of heavy ……

Large pressure vessels have been a hot spot for research because of their wide use occasions, many kinds of forming processes and high manufacturing difficulties. In addition, the key technologies of quality control in the production process of each forming technology are briefly outlined, and the causes of forming defects such as wrinkles and cracks in several typical forming processes are analyzed and some main control measures are summarized. In addition, the key technologies of quality control in the production process of each forming technology are briefly outlined, the causes of forming defects such as wrinkles, cracks, etc. in several […]

العربيةБългарски简体中文繁體中文DanskNederlandsEnglishFrançaisDeutschBahasa IndonesiaItaliano日本語한국어LatinPortuguêsРусскийEspañolதமிழ்ไทยTürkçe