Blog

Heat resistant steel is often used to manufacture parts and components working under high temperature in industrial sectors such as boilers, steam turbines, power machinery, industrial furnaces, aviation, petrochemical, etc. In addition to high temperature strength and resistance to high temperature oxidation corrosion, these cast parts also require sufficient toughness, good machinability, weldability and certain structural stability according to different applications. China began to produce heat-resistant steel in 1952. Later, some new low alloy heat strength steels were developed, so that the working temperature of pearlite heat strength steels was increased to 600 ～ 620 ℃; In addition, some new…

Technological Countermeasures for Reducing Welding Deformation of Large Structural Parts Large structure is the skeleton of construction machinery products, and also reflects the design level and manufacturing level of manufacturers. Due to the important role of structural members in bearing capacity, appearance modeling and product function realization, special attention should be paid to the design and manufacturing of construction machinery products. Large structural parts are difficult to support because of their large size, many welding parts, high requirements for part size accuracy and location accuracy, and especially the overall deformation, which has been a major problem for technologists. In this…

At present, electroplating technology is widely used in various fields of national production, and only careful operation can effectively save energy and protect the environment. Here is a brief introduction to some basic knowledge about electroplating process. Electroplating process classification: acid bright copper electroplating nickel/gold electroplating tin. Process flow: pickling → full plate copper electroplating → acid degreasing → micro etching → pickling → tin plating → pickling → pattern copper plating → nickel plating → citric acid dipping → gold plating. Process description. (1) Pickle. ① Function and purpose: remove the surface oxides and activate the surface. The general…

Ferrochrome ore belongs to the category of special sand in molding materials. Its main mineral composition is FeO. Cr2O3, with a density of 4.0 ～ 4.8g/cm3, a Mohs hardness of 5.5 ～ 6, and a refractoriness greater than 1900 ℃. Ferrochrome ore has a good effect of resisting alkaline slag, and does not react chemically with iron oxide, etc. As the thermal conductivity of chromite sand is several times higher than that of silica sand, and solid phase sintering occurs during molten metal pouring, it is beneficial to prevent the penetration of molten metal. According to these advantages of chromite…

Friction welding is a solid pressure welding method that uses the heat generated by the friction between the end faces of weldments to make the end faces reach the thermoplastic state, and then rapidly applies the upset force to achieve welding. Friction welding has the following advantages: (1) The welding quality is stable, the size accuracy of weldments is high, and the rejection rate of joints is lower than that of resistance butt welding and flash butt welding. (2) High welding productivity, 5-6 times higher than flash butt welding. (3) Suitable for welding dissimilar metals, such as carbon steel, low…

Aluminum is widely used because of its easy processing, good visual effect, rich surface treatment means, etc. How much do you know about the surface processing technology of aluminum and aluminum alloys in daily products? Mobile phone frame, charging bank, wire drawing rivet and lantern rivet are all made of aluminum alloy. Aluminum itself has the effect of waterproof and anti-corrosion, and is light in weight. The following sections will briefly describe the six major surface processing technologies of aluminum and aluminum alloys. 1. Sand blasting (shot blasting) The process of cleaning and roughening metal surfaces by the impact of…

For metals, in order to improve the use performance of metals, manufacturers will improve the surface treatment of metals. In our daily life, the common metal surface treatment technologies are: pickling purification treatment, electrolytic polishing treatment, degreasing and rust removal treatment, electroplating treatment and chemical treatment. The following is a detailed explanation of the six metal surface treatment technologies of China Standard Parts. Pickling and passivation treatment: It refers to that the process can be completed by immersing metal parts in pickling and passivation solution until the workpiece surface becomes uniform and silvery white. It is not only simple to…

1、 Selection of antirust oil The variety of antirust oil is complex, and the selection principles are as follows: 1. According to the metal type, different antirust oils have different antirust effects on different metal materials. Some have good antirust effects on ferrous metals, but the effect on copper is average. These are often described in the product description of antirust oils, which should be selected carefully. 2. According to the structure and size of metal products, solvent dilution type or grease type can be selected for those with simple structure and large surface area, while oil type is better…

1、 Basic principles for selecting stamping materials: In stamping production, the following basic principles should be followed when selecting raw materials for stamping parts. 1. Stamping die steel shall have usability to ensure the function of parts after stamping. 2. The materials shall have good universality of processing technology, and the selected materials shall adapt to the characteristics of stamping process and be easy for stamping. 3. The materials shall be easy to process, stable in forming, easy to obtain high-quality and high-precision stampings, and shall reach the number of stampings with specified burr height, so as to avoid waste…

Blister: a plastic processing technology. The main principle is to heat and soften the flat plastic hard sheet, and then use vacuum to adsorb it on the mold surface. It is formed after cooling. It is widely used in plastic packaging, lighting, advertising, decoration and other industries. Blister packaging: a general term for plastic products produced by Blister process and packaged with corresponding equipment. Blister packaging products mainly include: blister shell, tray, blister box, synonyms also include: vacuum cover, blister cover, etc. Blister packaging equipment mainly includes: Blister molding machine, punch, sealing machine, high-frequency machine, folding machine. The packaging products…