Industry News

  • Methods for inspection of large forgings

    Methods for inspection of large forgings

    Due to the high cost of raw materials for large forgings, as well as the production process, if defects occur, they will affect the follow-up processing or poor processing quality, and some affect the performance and use of forgings strictly, even reducing the service life of the finished parts, ...
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  • Injection molding of stainless steel flanges

    Injection molding of stainless steel flanges

    Stainless steel flanged ball valve, globe valve, gate valve when used, only for fully open or closed, do not allow to do flow regulation, so as to avoid sealing surface erosion, accelerated wear. Gate valves and upper screw globe valves have reverse sealing device, hand wheel to the top to the us...
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  • What’s different killed steel and Rimmed steel!!!

    What’s different killed steel and Rimmed steel!!!

    Killed steel is steel that has been completely deoxidized by the addition of an agent before casting such that there is practically no evolution of gas during solidification. It is characterized by a high degree of chemical homogeneity and freedom from gas porosities.   Semi-killed steel i...
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  • How is the flange welded?

    How is the flange welded?

    1. Flat welding: only welding the outer layer, without welding the inner layer; Generally used in medium and low pressure pipelines, the nominal pressure of the pipeline is less than 0.25mpa. There are three kinds of sealing surface of flat welding flange, which are smooth type, concave and conve...
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  • There are problems in the processing of stainless steel forgings

    There are problems in the processing of stainless steel forgings

    Weld defects: weld defects are serious, manual mechanical grinding processing method is used to compensate, resulting in grinding marks, resulting in uneven surface, affect the appearance. Inconsistent surface: only pickling and passivation of the weld will cause uneven surface and affect the app...
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  • The reason of sliding or crawling of hydraulic cylinder piston and the treatment method

    The reason of sliding or crawling of hydraulic cylinder piston and the treatment method

    Hydraulic cylinder piston sliding or crawling will make the hydraulic cylinder work instability. Do you know the reason for it? Do you know what to do with it? The following article is mainly for you to talk about. (1) hydraulic cylinder internal astringency. Improper assembly of the internal par...
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  • Flange features and use attention

    Flange features and use attention

    Flanges are disk-shaped parts most commonly used in piping. Flanges are used in pairs and with matching flanges on valves. In pipeline engineering, flanges are mainly used for the connection of pipelines. In the need to connect the pipeline, all kinds of installation of a flange, low pressure pip...
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  • How to improve the production efficiency of forging heat treatment

    How to improve the production efficiency of forging heat treatment

    【DHDZ】As we all know, heat treatment is an important link in the forging process, related to the hardness of forgings and other problems, so how to improve the production efficiency of heat treatment forgings? Improve the efficiency of heat treatment production, by increasing the furnace charg...
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  • What should be noted in the examination of die forgings before heat treatment?

    What should be noted in the examination of die forgings before heat treatment?

    The inspection before solution heat treatment is a pre-inspection procedure to check the finished product's surface quality and dimensions according to the technical conditions, die forging drawing and process card after the forging forming process is finished. Specific inspection should pay atte...
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  • Different connection modes of flange elbow

    Different connection modes of flange elbow

    Flanges, or flanges, are symmetrical disk-like structures used to connect pipes or fixed shaft mechanical parts. They are usually fixed with bolts and threads. Including flange and stainless steel flange elbow, give you a brief introduction to the flange and pipe connection of several ways. The f...
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  • The processing of stainless steel flange needs to understand and pay attention to some problems

    The processing of stainless steel flange needs to understand and pay attention to some problems

    1, weld defects: stainless steel flange weld defects are more serious, if it is to use manual mechanical grinding treatment method to make up, then the grinding marks, resulting in uneven surface, will affect the appearance; 2, polishing and polishing passivation is not uniform: pickling passivat...
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  • Forgings of pickling and blast cleaning

    Forgings of pickling and blast cleaning

    Forgings are widely used in industry, such as aircraft, automobile and so on. Of course, forgings are also to be cleaned, the following is mainly to tell you about the knowledge of pickling and shot blasting forgings. Pickling and cleaning of forgings: Removal of metal oxides by chemical reaction...
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