Technical

  • What’s called “Electro Slag Remelting(ESR) in tool steel industry ?

    The electroslag remelting (ESR) process is used to remelt and refine steels and various super-alloys, resulting in high-quality ingots. H11/1.2343ESR, H13/SKD61/1.2344ESR, 420SS/1.2083ESR, 1.2367ESR, 1.2316ESR 1.2767ESR, D2/SKD11/1.2379ESR, M2/1.3343ESR, A8ESR [View Details]
  • What’s called Vacuum Degassing(VD) in tool steel industry ?

    Vacuum degassing of steel takes place after the molten steel has left the furnace and before the steel is poured into ingots or processed through a caster. The main objectives of steel degassing are reduction/elimination of dissolved gases, especially hydrogen and nitrogen. Vacuum degassing(VD), the decarburization is goes by top blowing oxygen under vacuum conditions, and through ladle bottom blowing argon to promote the circulation flow of molten steel. IN smelting stainless steel, it's easy to reduce the carbon to 0.002% - 0.008% whIle chromium not be oxidized..... [View Details] [File Download]
  • What’s called “Ladle Furnace(LF) in the tool steel industry ?

    In a foundry, a ladle is a vessel used to transport and pour out molten metals. Ladles range in size from small hand carried vessels that resemble a kitchen ladle and hold 20 kilograms (44 lb) to large steelmill ladles that hold up to 300 tonnes (330 tons). Many non-ferrous foundries also use ceramic crucibles for transporting and pouring molten metal and will also refer to these as ladles. [View Details]
  • The difference between Mid-frequency Induction Furnace and Electric Arc Furnace

    In terms of phosphorus removal, sulphur removal and deoxidation. Electric Arc Furnace(EAF) is better than Mid-frequency Induction Furnace(IF). IF is cold slag, the slag temperature is maintained by the molten steel. EAF is hot slag, slag is heated by electric arc, the phosphorous and sulphur can be removed by the slag, also deoxidation. [View Details]
  • Knife Steel

    Where to get steel for knifemaking ? As many people know, you can't just use any old steel and make a good knife out of it. Different steels have different properties, and you have to make sure you get the right one. [View Details]
  • What Do YOU Know About Mold Steel Quality?

    Many industries place strict requirements on the acceptable level of surface defects and imperfections that may appear on a plastic molded part. Such conditions often apply to critical components for the medical and pharmaceutical industries as well as for the manufacturers of lenses and other optical devices. However, for aesthetic reasons, many other consumer goods have similar restrictions. After all, any defect that appears on the surface of the mold steel is likely to be replicated onto the molded part. [View Details]
  • Characteristics of mold steels

    S7 is probably the most common steel used in the USA for plastic injection molds, or moulds for the rest of the world. This steel is relatively easy to machine, can be hardened to Rockwell 54-59, which is certainly hard enough for a mold. It is easy to polish to a high lustre, is easy to weld and is relatively tough. [View Details]
  • Common Steels Used in Injection Mold Making

    Making a poor tool steel choice for your injection mold can mean a cracked core or cavity, causing it to wear out long before it is expected it to. To help avoid this problem ask yourself these questions before making your tool steel choice: [View Details]
  • How To Choose Material For Injection Molds, S7, P20, NAK 55, PX5, 420SS, H13 and Aluminum

    Often it is not so clear which material would work best for your injection molds, besides the fact that there are so many choices available. Choosing the wrong tool steel can be devastating to the outcome of a plastic molded part, so it is important to make an informed decision. [View Details]
  • Choosing the Right Injection Mold Tooling Material - Hardened Steels

    Common grades of hardened steel include H13, S7 and 420SS. Similar to pre-hard steel, hardened steel offers a wide range of versatility in the injection mold making industry. Typically found with a Rockwell rating of RC 46-62 (S7 tends to be a little harder than H13), it can be a great material for creating core and cavity detail. With hardened steel molds, one can easily achieve 1,000,000 cycles for unfilled materials and 250,000-500,000 cycles with filled materials. Once again, this range is dependent on the amount of filler present in the plastic material. [View Details]

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