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Under the background of double carbon target, hydropower, as a rich and lasting clean energy, has broad development prospects. The turbine runner is the heart of the hydropower unit, and its welding quality is directly related to the safety and reliability of the unit operation. The welding of large-scale runner at home and abroad uses the same material of martensitic stainless steel welding material.
Harbin Weir Welding Co., Ltd. independently developed low alloy high strength steel solid gas shielded welding wire HS-70, suitable for welding low alloy steel with yield strength of 550 ~ 690Mpa. It is the earliest independent research and development of high-strength steel welding wire products in China. It has more than 30 years of engineering application experience and has been applied in many major projects in China. It is suitable for welding of bridges, petrochemical industry, engineering machinery and commonly used medium carbon tempered steel and cast steel structures with corresponding strength level requirements.
Low alloy high strength steel with yield strength of 690MPa is widely used in large-scale engineering machinery manufacturing, marine engineering and hydropower engineering. However, in major projects and key welds, most of the welding materials rely on imports. In order to solve this problem and accelerate the realization of localization, Harbin Weir Welding Co., Ltd. has transformed years of technological research and development results into products and successfully developed HS-80 solid gas shielded welding wires, which are suitable for welding bridges, steel structures and construction machinery with corresponding strength requirements.
In recent years, with the continuous emergence of major engineering projects, the requirements for the use of low-alloy high-strength steel are getting higher and higher. While the carrying capacity continues to increase, it must also meet the needs of lighter weight and more efficient. Therefore, 1000MPa Grade high-strength steel is increasingly used by large construction machinery manufacturers. The HS-96 solid gas shielded welding wire developed by Weir Company has met the engineering needs and is suitable for welding bridges, steel structures and construction machinery with corresponding strength requirements.
Harbin Weir Welding Co., Ltd. nickel-based 600 alloy welding series welding materials include SAW NiCr-3/SJ608 wire submerged arc welding, ENiCrFe-2 electrode and ERNiCr-3 wire. Suitable for welding Inconel600/601 alloy, Incoloy800/800H alloy, can be used for steel surface surfacing. The welding material is widely used in the welding of dissimilar metals, such as Inconel alloy, Incoloy alloy, Monel alloy, carbon steel, low alloy steel and stainless steel. At present, it has been widely used in the welding of pressure equipment, heat treatment equipment, petrochemical, clean energy equipment, etc.
The corrosion-resistant lining of the inner wall of pressure vessel equipment such as petrochemical industry, coal chemical industry and boiler needs large-area surfacing stainless steel. For a long time, based on reliability, double-layer surfacing welding method has been selected. The efficient and fast single-layer surfacing welding method has high process requirements and technical difficulties. Surfacing materials have been dependent on imports. After years of research and development, Harbin Weir Welding Co., Ltd. has developed single-layer electroslag stainless steel strip surfacing materials: welding strip H308LF and flux SJ15F, which replace double-layer strip surfacing welding and have been applied to surfacing welding on the inner wall of domestic pressure vessels.
The corrosion-resistant lining of the inner wall of equipment such as hydrogenation process equipment and coal chemical pressure vessels in oil refining and petrochemical industries requires large-area surfacing stainless steel. For a long time, based on reliability, double-layer surfacing welding method has been selected. Efficient and fast single-layer surfacing welding method has high process requirements and technical difficulties. Surfacing materials have been imported. After years of research and development, Harbin Weir Welding Co., Ltd. has developed single-layer electroslag stainless steel strip surfacing materials: welding strip H316LF and flux SJ15F, which replace double-layer strip surfacing welding and have been applied to surfacing welding on the inner wall of domestic pressure vessels.
The corrosion-resistant lining of the inner wall of the equipment in the hydrogenation process device in the oil refining and petrochemical industries requires a large area of surfacing stainless steel. For a long time, based on reliability, double-layer belt-pole surfacing method has been selected. The efficient and fast single-layer belt-pole surfacing method has high process requirements and great technical difficulty. The surfacing materials have been dependent on imports. After years of research and development, Harbin Weir Welding Co., Ltd. has developed single-layer electroslag stainless steel strip surfacing materials for hydrogenation units: welding strip H347LF and flux SJ15F, which replace double-layer strip surfacing and have been applied to surfacing welding on the inner wall of domestic hydrogenation reactors.
As a new scarce clean resource, LNG has become a new hot spot in the world oil and gas industry. However, most of the welding materials used in storage tanks still rely on imports. After years of research and development and improvement, Harbin Weir Welding Co., Ltd. has successfully developed 9% Ni steel matching nickel-based wire submerged arc welding material SAW NiCrMo-4/SJ609 for LNG storage tanks. The research and development of welding materials mainly reduces the content of impurity elements such as sulfur and phosphorus in the welding wire through the design and optimization of the composition of the welding wire, thus improving the mechanical properties of the deposited metal, reducing the sensitivity of welding cracks and improving the crack resistance. Through the selection of flux slag system, the optimization of flux composition design breaks through the welding process problems such as indentation, poor straightness and excessive fluidity when submerged arc welding is in the transverse welding position. Through the comparison of welding test data and third-party evaluation data, the SAW NiCrMo-4/SJ609 developed by the submerged arc welding wire is comparable to imported welding materials in terms of welding process performance and mechanical properties, and has the ability to replace imported welding materials. At present, it has obtained the certification of many classification societies at home and abroad, such as CCS, DNV, BV, ABS and LR.
In order to solve the energy crisis in China, China has been building 160000 m3LNG storage tanks since 2004. The 9% Ni steel plate for storage tanks and the construction welding technology have already been localized, but the supporting nickel-based welding materials are still all imported. In order to solve the technical bottleneck of welding materials for LNG storage tanks and meet the needs of major national energy development, Harbin Weir Welding Co., Ltd. has successfully developed 9% Ni steel ENiCrMo-6 welding rods for LNG storage tanks after more than ten years of research and development work. The research and development of welding rod mainly carried out the determination of the basic slag system of the coating, the design optimization of the formula, the composition design and optimization of the weld metal, the optimization of welding process and so on. By optimizing the slag system and composition design, the impurity content of hydrogen, oxygen, nitrogen, sulfur and phosphorus in the deposited metal is reduced, the pore sensitivity is reduced, and the crack resistance is improved; the red tail phenomenon is successfully solved, which is suitable for large-scale welding, and the welding efficiency and utilization rate are improved. The manufacturability, mechanical properties and quality stability of the developed ENiCrMo-6 electrode are comparable to those of imported similar products, and have engineering application conditions. In summary, the process of the 9% Ni steel supporting electrode is excellent, and the comprehensive mechanical properties meet the design requirements of LNG storage tank. At present, it has obtained the certification of many classification societies, and has taken the lead in the domestic LNG land tank and ship fuel tank manufacturing projects.
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Harbin Ware Welding Co., Ltd. is one of the pillar industry companies affiliated to Harbin Welding Research Institute. It is a global open national high-tech enterprise integrating scientific research and development, production, sales and service.
