News

  • Causes and solutions of mesh hairy wings (turtle cracks) produced by aluminum die casting

    Appearance inspection: There are net-like hair-like protrusions or depressions on the surface of the die-casting parts, which will continue to expand and extend as the number of die-cast parts increases. The reasons are as follows: 1) There are cracks on the surface of the die-casting cavity 2) U...
    Read more
  • Causes and solutions of flow marks and patterns produced by aluminum die casting

    Visual inspection: There are stripes on the surface of the casting that are consistent with the direction of the molten metal flow, and there are obviously non-directional lines that are different from the metal matrix in color, and there is no development trend. The causes of flow marks are as f...
    Read more
  • Analysis of common defects of gray cast iron

    Stomatal: 1. Features and discovery methods Sieve-shaped pores: relatively evenly distributed on the whole or most of the cross-section of the casting Subcutaneous pores: 1~3mm from the surface of the casting, there are densely distributed pores It can be found by visual inspection, mechanical pr...
    Read more
  • Control of foam pattern density

    1. Understanding of pre-release density: For example: STMMA-2# material, we suggest a specific gravity of 19~21g/l. It is not that the pre-develop density of any casting should be controlled within this range; the pre-develop density should be reasonably selected according to the structure of dif...
    Read more
  • The effect of foam pattern density on castings

    The effect of low density patterns on castings: The low-density pattern will mainly cause a large shrinkage of the pattern and easy deformation, causing the casting size to be inconsistent with the drawing or insufficient machining allowance. When the density of pre-hair beads is low, the shape i...
    Read more
  • Lost Foam Casting—The Effect of Foam Pattern Density on the Quality of Castings

    1. The effect of high-density patterns on castings: The mold filling process of lost foam casting is that the foam pattern in the cavity softens, collapses, melts until it is vaporized and decomposed under the action of the front of the flowing metal liquid. The resulting liquid products and gase...
    Read more
  • Gray iron castings cast hard, what does it matter

    Gray cast iron, also known as gray cast iron, has graphite flakes. Due to the existence of flake graphite, the metal matrix structure is cut and the effective area of the load is reduced, so its comprehensive mechanical properties are low, but its vibration damping, wear resistance, casting and c...
    Read more
  • Method to reduce the porosity and trachoma of aluminum die casting products

    In order to avoid the trachoma of porosity in aluminum die casting process, the following points are summarized. 1. Ensure the quality of degassing in aluminum alloy smelting, select a good degassing agent to reduce the air content in aluminum water, timely remove the liquid level scum, bubble an...
    Read more
  • What are the melting process and main points of gray cast iron and ductile iron

    1. Poor quality of the carbonizer will cause significant losses to the casting enterprise. The adverse effects after adding molten iron mainly include the following: (1). The absorption is slow and the absorption rate is low, which results in high power consumption and increased cost; (2). Many s...
    Read more
  • Solidification characteristics of ductile iron

    The difference between the solidification methods of nodular cast iron and gray cast iron is caused by the different growth methods of nodular cast iron and flake ink. After the precipitation of graphite in the hypoeutectic gray iron at the edge of the primary austenite, the two sides of the grap...
    Read more
  • Method for improving the strength of gray cast iron

    For industrial production, equipment requirements are definitely indispensable, so many times we will use some equipment to carry out production work. And we also know that the most important thing for the equipment is to be able to have a good part, such as the gray iron castings that we can com...
    Read more
  • Definition of casting

    The molding method of pouring, injecting, or sucking molten metal into the mold cavity and obtaining a blank or part with a certain shape, size and performance after solidification is called casting. Because casting uses the next liquid forming process, it has wide adaptability to material types ...
    Read more