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  • Cleanliness requirements for alloy materials for superalloy castings

    2019-06-05 10:30:06
    In the production process of high-temperature alloys and their casting, the purity of high-temperature alloy castings is one of the most important technical problems.
  • Heat treatment vacuum heating has quenching and carbonization?

    2019-06-05 10:26:49
    There is a large amount of quenching oil in the workpiece entering and leaving the furnace, the material basket is polluted, the feeding trolley enters and exits into the hot chamber, and remains on the cold wall of the hot chamber. When heated, a volatile reducing atmosphere is formed to increase the carbon of the workpiece.
  • Why 1Cr18Ni9Ti will be replaced by 304 stainless steel tube

    2019-06-05 10:21:32
    The main reason for the use of 1Cr18Ni9Ti is that the content of C in 304 is relatively low, so its hardness is relatively low. The price of 1Cr18Ni9Ti is more expensive than 304, and the processing cost is relatively high. Therefore, it is generally mainly made of 304 material.
  • Heat-resistant steel castings, four fires in heat treatment

    2019-06-05 10:07:07
    When it comes to heat-resistant steel castings, we have to mention the heat treatment industry; when it comes to heat treatment, we have to mention four fires in the industry, annealing, normalizing, quenching and tempering. Today, let's talk about the difference between them. First, annealing
  • De-rusting method of cast aluminum parts and alkali etching treatment of cast aluminum parts

    2019-06-05 10:01:30
    It can be solved by changing the alkali etching procedure, that is, alkali etching treatment is performed after casting molding. According to the operation of the process, the occurrence of problems such as scrapping of the workpiece due to alkali corrosion can be prevented, and the surface quality after oxidation is favorable.
  • What are the hot forging of cast copper parts according to the application?

    2019-06-05 09:57:07
    Most cast copper parts are not heat treated and strengthened, but are used in the as-cast condition.
  • Metal casting

    2019-06-05 09:49:37
    Metal casting is a process in which a metal is smelted into a liquid that meets certain requirements and poured into a mold, and cooled, solidified, and cleaned to obtain a casting having a predetermined shape, size, and performance. Casting blanks reduce the cost and reduce the time to some extent due to the near-forming, to achieve no machining or a small amount of processing. Casting is one of the basic processes of the modern machinery manufacturing industry.
  • Principles of casting method selection in precision casting

    2019-06-05 09:42:33
    Sand type precision casting. According to statistics, in China or internationally, 60-70% of all castings are produced by sand, and about 70% of them are produced with clay sand.
  • Development prospects of investment casting precision casting technology

    2019-06-05 09:00:43
    The products obtained by investment casting are precise and complex, close to the final shape of the part, and can be used directly without machining or processing. It is an advanced process of near-net shape formation and an excellent process technology in the foundry industry. The application is very extensive.
  • The main function of precision casting high pressure hydraulic sand cleaning machine

    2019-06-05 08:51:29
    The surface of precision castings is non-destructive sand cleaning. The sand cleaning equipment is easy to operate and has high efficiency.
  • Factors affecting the dimensional accuracy of precision castings

    2019-06-05 08:42:24
    The precision of precision castings is affected by many factors such as casting structure, casting material, moulding, shell making, roasting and casting. Any setting or unreasonable operation will change the shrinkage of castings, resulting in dimensional accuracy of castings. There is a bias in the requirements.
  • Gear precision forging: complete machining process of gear precision forging

    2019-06-05 08:31:38
    Gear precision forging is also a kind of precision forging
  • Forging category

    2019-06-05 08:25:31
    According to the forming mechanism, forging can be divided into free forging, die forging, rolling ring, special forging
  • Different forging methods have different processes

    2019-06-05 08:20:35
    Different forging methods have different processes, wherein the hot forging process has the longest process, and the general sequence is: forging blanking; forging billet heating; roll forging stock;
  • Characteristics of forgings compared with castings

    2019-06-05 08:14:28
    Compared with castings, metals can improve their microstructure and mechanical properties after forging. After the hot-working deformation of the cast structure by the forging method, the original coarse dendrites and columnar grains become the equiaxed recrystallized structure with fine grains and uniform size due to the deformation and recrystallization of the metal, so that the original segregation in the steel ingot, The compaction and welding of loose, stomata and slag inclusions make the structure more compact and improve the plasticity and mechanical properties of the metal.
  • Advantages and disadvantages of ductile iron

    2019-06-04 18:59:36
    Compared with cast iron, ductile iron has an absolute advantage in terms of strength. The tensile strength of ductile iron is 60k, while the tensile strength of cast iron is only 31k. The yield strength of ductile iron is 40k, while cast iron does not show yield strength and eventually breaks. The strength-cost ratio of ductile iron is much better than that of cast iron.
  • Some design elements of precision castings

    2019-06-04 18:56:52
    In addition to the requirements of the machine equipment itself and the requirements of machining process, the design of precision castings should also meet the requirements of the casting process. The structural design of the castings should pay attention to the following points: First, it is convenient to manufacture models, core boxes and shapes:
  • Precision casting technical requirements

    2019-06-04 18:53:41
    For small castings, it is possible to use a horizontal or vertical type of boxless high-pressure molding machine production line, and the production efficiency of the real model is high.
  • What is lost wax casting?

    2019-06-04 18:46:19
    Investment casting is also called lost wax casting, including waxing, waxing, grouping, dipping, melting wax, casting molten metal and post-treatment.
  • What is a steel casting?

    2019-06-04 18:41:08
    In metal smelting, ingot casting is divided into upper casting and lower casting. The molten steel ingot is usually a lower casting method. The molten steel is discharged from the underside of the ladle and enters the medium casting tube, and enters the ingot mold from below.
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