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These articles are all highly relevant precision casting products. I believe this information can help you understand precision casting products's professional information. If you want to know more, you can contact us at any time, we can provide you with more professional guidance.
  • With some lost wax casting manufacturer and big fire, will be used in daily work environment at the same time, there may be more dust workshop, all need to pay attention to good environmental hygiene very much, so can more effectively prevent the occurrence of accidents such as fire, and choose the

    2018.06.03

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  • H2. Method 1: process planning: strictly control the process, before the tanks, to ensure that the appearance and the sand core is with temperature condition, to ensure when pouring molten steel liquid, on appearance coarse broken place choose luck gentleman family ISOMOL300 alcohol-based zircon pow

    2018.05.03

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  • What is lost wax casting?Lost wax casting is also called precision casting. Artwork is also used in this way. Most ancient works of art were this way.Materials: wax, shell refractory (such as quartz sand, bauxite, etc.), binder (such as water glass, ethyl silicate, silica sol, etc.)The first step is

    2018.04.26

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  • H2. Precision casting is a casting process with less cutting or no cutting, which is an excellent technology in casting industry. Its application is very wide, not only is applicable to various types, various kinds of alloy casting, and produce the casting dimension accuracy and surface quality is h

    2018.04.08

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  • H1. The following is to explain the process of precision casting wax molds:H2. 1.process operation:When repairing any kind of precision casting wax molds, the waxing personnel first make clear which part should be repaired.Check whether the wax model has bubbles, indentation, deformation and other d

    2018.04.08

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  • Stainless steel precision casting for use in the process of its mechanical properties is relatively high, mainly due to the melting point of the product is higher, stainless steel precision casting of easy oxidation of liquid steel, illiquid and contraction of the molten steel at run time, volume sh

    2018.04.08

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  • Precision casting structure design should accord with the requirement of machine equipment itself and mechanical processing manufacturability requirements, should also meet the requirements of the casting process, casting structure design should pay attention to the following points:1. To facilitate

    2018.04.08

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  • Explain the difference between precision casting and ordinary casting.H2. Precision casting is to pour the liquid metal into the casting mould with the same shape as the parts. When the casting is cooled, our precision casting products can be formed.The casting methods include sand casting, special

    2018.04.04

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  • The sulfuric oxide film of stainless steel precision casting is an important factor to influence the high purity and transparency of the oxide film of stainless steel castings. The porosity, purity, thickness and sealing quality of stainless steel precision casting can directly interfere with the mi

    2018.03.29

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FAQS

  • What is 'multiple certification'?

    This is where a batch of steel meets more than one specification or grade. It is a way of allowing melting shops to produce stainless steel more efficiently by restricting the number of different types of steel. The chemical composition and mechanical properties of the steel can meet more than one grade within the same standard or across a number of standards. This also allows stockholders to minimise stock levels.

    For example, it is common for 1.4401 and 1.4404 (316 and 316L) to be dual certified - that is the carbon content is less than 0.030%. Steel certified to both European and US standards is also common.

  • What surface finishes are available on stainless steels?

    There are many different types of surface finish on stainless steel. Some of these originate from the mill but many are applied later during processing, for example polished, brushed, blasted, etched and coloured finishes.

    The importance of surface finish in determining the corrosion resistance of the stainless steel surface cannot be overemphasised. A rough surface finish can effectively lower the corrosion resistance to that of a lower grade of stainless steel.

  • Can I use stainless steel at high temperatures?

    Various types of stainless steel are used across the whole temperature range from ambient to 1100 deg C. The choice of grade depends on several factors:

    1. Maximum temperature of operation
    2. Time at temperature, cyclic nature of process
    3. Type of atmosphere, oxidising , reducing, sulphidising, carburising.
    4. Strength requirement

    In the European standards, a distinction is made between stainless steels and heat-resisting steels. However, this distinction is often blurred and it is useful to consider them as one range of steels.

    Increasing amounts of Chromium and silicon impart greater oxidation resistance. Increasing amounts of Nickel impart greater carburisation resistance.

  • Can I use stainless steel at low temperatures?

    Austenitic stainless steels are extensively used for service down to as low as liquid helium temperature (-269 deg C). This is largely due to the lack of a clearly defined transition from ductile to brittle fracture in impact toughness testing.

    Toughness is measured by impacting a small sample with a swinging hammer. The distance which the hammer swings after impact is a measure of the toughness. The shorter the distance, the tougher the steel as the energy of the hammer is absorbed by the sample. Toughness is measured in Joules (J). Minimum values of toughness are specified for different applications. A value of 40 J is regarded as reasonable for most service conditions.

    Steels with ferritic or martensitic structures show a sudden change from ductile (safe) to brittle (unsafe) fracture over a small temperature difference. Even the best of these steels show this behaviour at temperatures higher than -100 deg C and in many cases only just below zero.

    In contrast austenitic steels only show a gradual fall in the impact toughness value and are still well above 100 J at -196 deg C.

    Another factor in affecting the choice of steel at low temperature is the ability to resist transformation from austenite to martensite. 

  • Is stainless steel non-magnetic?

    It is commonly stated that “stainless steel is non-magnetic”. This is not strictly true and the real situation is rather more complicated. The degree of magnetic response or magnetic permeability is derived from the microstructure of the steel. A totally non-magnetic material has a relative magnetic permeability of 1. Austenitic structures are totally non-magnetic and so a 100% austenitic stainless steel would have a permeability of 1. In practice this is not achieved. There is always a small amount of ferrite and/or martensite in the steel and so permeability values are always above 1. Typical values for standard austenitic stainless steels can be in the order of 1.05 – 1.1. 

    It is possible for the magnetic permeability of austenitic steels to be changed during processing. For example, cold work and welding are liable to increase the amount of martensite and ferrite respectively in the steel. A familiar example is in a stainless steel sink where the flat drainer has little magnetic response whereas the pressed bowl has a higher response due to the formation of martensite particularly in the corners.

    In practical terms, austenitic stainless steels are used for “non-magnetic” applications, for example magnetic resonance imaging (MRI). In these cases, it is often necessary to agree a maximum magnetic permeability between customer and supplier. It can be as low as 1.004.

    Martensitic, ferritic, duplex and precipitation hardening steels are magnetic.

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