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News
Innovative manufacturing process of high-precision small-diamete
Views: 127 Aug 19 , 2022
High-precision small-diameter high-pressure boiler seamless steel tubes have been widely used in hydraulic systems and diesel fuel systems. At present, cold-rolled or cold-drawn capillaries are generally used to manufacture high-precision, small-diameter, high-pressure seamless steel pipes. Although they can meet the technical...
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Passivation process of galvanized checkered sheet
Views: 155 Aug 16 , 2022
Passivation is widely used as an effective protective measure for metals and metal coatings in less severe environments.
The passivation treatment of galvanized checkered plate is a kind of chemical conversion coating treatment. The actual passivation process depends on the electrochemical reaction process on the metal surface....
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The main performance and classification of seamless square tube
Views: 146 Aug 12 , 2022
Seamless square pipe is a square steel pipe with four corners. It is a square steel pipe formed by cold drawing and kneading of seamless steel pipe.
The main properties of square tubes include: plasticity, hardness and fatigue. Plasticity refers to the ability of a metal material to undergo plastic deformation (permanent deformation)...
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Seamless tube processing technology
Views: 171 Aug 10 , 2022
The raw material of the thick-walled steel pipe comes from the steel pipe billet, which needs to be processed into the required billet through the processing technology, and the billet is sent to the furnace for heating through a conveyor belt or the like. Since the tube blank needs to be perforated by a pressure perforator after it is...
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Main uses of stainless steel
Views: 143 Aug 05 , 2022
1Cr18Ni9Ti austenitic type is the most widely used, suitable for food, chemical, pharmaceutical, atomic energy industries
0Cr25Ni20 material for austenitic furnace, material for automobile exhaust purification device
1Cr18Ni9 austenitic type has high strength by cold working, decorative parts for construction
0Cr18Ni9 austenitic...
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The method of effectively controlling the scar of galvanized sea
Views: 139 Aug 03 , 2022
Knowing that galvanized seamless steel pipes will have scars, what are these scars? These scars are small pits of different sizes like soybean particles, with gray-brown or gray-black foreign bodies in them. So, how to effectively control the scar of galvanized seamless steel pipe? This article introduces eight methods that can...
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Introduction of anti-corrosion processing of national standard s
Views: 143 Aug 02 , 2022
Details of anti-corrosion processing of national standard spiral steel pipes: In the three electrochemical corrosion processes for buried pipelines, the anti-corrosion method of national standard spiral steel pipes is to suppress one of the processes first. For example, adding anti-corrosion coating to the outer wall of the steel pipe can...
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Causes of Welding Cracks in Electric Welding of Q345D Seamless S
Views: 145 Jul 29 , 2022
The electric welding crack of Q345D seamless steel pipe is a serious production and processing defect, which will reduce the total area of the welding cross-section and cause the bearing stress. Welding cracks are generally divided into vertical and horizontal. Vertical cracks are the most common in the notch of the molten pool....
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Q345D seamless steel pipe penetration detection method
Views: 124 Jul 27 , 2022
Q345D seamless steel pipe cannot use magnetic particle inspection for non-magnetic raw materials such as martensitic stainless steel angle steel, copper and aluminum, but can be inspected by infiltration inspection method. The key of Q345D seamless steel pipe penetration detection method is color detection and fluorescence...
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Why do ordinary seamless steel pipes need to be pickled?
Views: 150 Jul 25 , 2022
The iron oxide scale on the inner and outer surfaces of the hot-rolled tube stock or the in-process tube after the intermediate heat treatment should be removed before the cold working of the ordinary seamless tube. The existence of iron oxide scale, on the one hand, affects the quality of subsequent lubrication; on the other hand,...
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