Heat Treatment Salts


Heat Treatment Salts

The agents used for salt bath heat treatment are generally called “salts”. When actual salts and other necessary composition materials are heated continuously, they become liquid. Heat treatment using this heat media is called salt bath heat treatment. Salt bath heat treatment is a practice with a long history, used to effectively bring out specific characteristic in metal materials. Metal heat treatment is applied to automobile, electrical appliance, office appliance, precision machine, aircraft, and atomic energy tools and components. In addition, due to the diverse properties of salts, they are widely utilized as heat exchange media, and chemical reaction media, as well as in optical glass reactions, fuel cells, new energy related materials, and more. Parker Netsushori Kogyo is Japan’s main manufacturer of heat treatment salts, meeting the needs of customers with with technology and development capabilities it has cultivated over the years.

Product Lineup

Salts are provided in the form of powder or solid which are melted by heating up in the heating cell of salt bath and then used for various applications. Salts are line up to many kinds of salts according to the temperatures applied. The range of temperature extends to 160 – 1300°C.

For heating-up and for isothermal cooling in case of meal heat treatment of steel.

(As the case may be, an addition of stop-off paint for decarburizing is needed) Typical products are listed below.

  • Middle Temperature Range

    To be used for heating bath up to 1100°C without decarburizing, carburizing and oxidizing of high alloy steel.

    GS540/R2 A 5% addition of stop-off paint R2 is generally aimed.
    (Temperature used: 600 – 900°C)
    GS750/R2 (Temperature used: 850 – 1100°C)

    Besides, a series of H-9 to -10 is available.

  • High Temperature Range

    To be mainly used for hardening of high-speed and die steel in the temperature range of 980- 1350°C

    HS950 (Temperature used: 1100 – 1300°C)
    HS1100 (Temperature used: 1100 – 1350°C)
    PARKERNEUTRAL (Temperature used: 950 – 1350°C)

    Besides, a series of H-11 to -13 is available.

  • Quenching, Tempering and Isothermal Cooling Salts

    These are the salts especially well assorted and generally used for quenching, tempering and high temperature tempering of steel, but in addition, there are the fields of application widening the range of use; AS-series and T-series of nitrate salts (160 – 550°C), which are primarily used for tempering, are now used for salt quenching after gas carburizing and austempering of thin plate spring and case iron, etc. Safety by reason of incombustibles as the physical properties of salts under isothermal cooling in the temperature range above the ignition point of quenching oil, as well as a simple cleaning by reason of its water solubility characterize the salts.

    GS430 For the tempering at high temperature of high-speed, heat resisting steel and die steel.
    (Temperature used: 480 – 700°C)
    GS230 For the tempering of high-speed steel, heat resisting steel and die steel.
    (Temperature used: 250 – 700°C)
    To be widely used for isothermal cooling, etc. of quenching, tempering, austerpering, etc.
    (Tempering used: 160 – 550°C)
    (Tempering used: 240 – 550°C)
    For the austempering not including Nitrite.
    (Tempering used: 280 – 550°C)

    T-3 to -6 series with the same specifications as AS series are also ready for sale.

Metal Surface Treating(Nitrocarburizing, carburizing, nitriding, carbonitriding)

  • ISONITE Salts

    NS-2 Nitrocarburizing salts applicable to all kinds of ferrous metals and also to the nitrocarburizing materials such as austenitic stainless steel, etc. which are difficult to be treated by gas nitrocarburizing process. It is applicable to nitriding as well.
    (Temperature used: 570°C)
    TF-1 Nitrocarburizing process using innoxious cyanate as the main ingredient. The derivative technology by warm bath quenching such as SQ, SQP, QPQ processes gives, on top of proper efficiency of ISONITE, corrosion resistance which is more than that of hard chrome plating and assumes a black color. (Temperature used: 580°C)

    Moreover, ISONITE LS process has been developed which makes low temperature treatment possible.

  • Carbonitriding Salts

    C-1 With thin case depth of less than 0.1mm and very high hardness, it is used for small or thin workpieces. (Tempering used: 650 – 850°C)
    GS540/C3 (70%:30%) (Temperature used: 800 – 860°C)
  • Carburizing Salts

    GS540/C3 90%:10% Applicable even to steel hard to carburize and suitable for marquench in nitrate acid bath.(Temperature used: 850 -930°C)
    C5/C3 GS540 60%:34%:6% Uniform amount of carbon can be obtained to the carburized depth of 1.2mm of the parts made of carbon steel and case hardening steel.(Temperature used: 980 – 1000°C)
    NO-CY Consisting of completely cyanide-free base salt with sodium carbonate as a chief ingredient and additive with mainly carbon. By furnishing with an agitator, the usual salt bath furnace can be utilized.
    CE Constant 50, 80, 110 Highly activated carburizing bath with surface carbon concentration of 0.5%, 0.8% and 1.1% respectively makes carburizing layer with specific and respective surface carbon concentration.(Temperature used: 800 – 950°C)
    In addition, C-7R, T

Salt for Light Metals

  • Salt for Light Metals

    AVS250 Exclusive use for normalizing salt bath of all sorts of light metals, provided Mg content is less than approx. 8%.

Heat Transfer

  • AVS250 Exclusive use for normalizing salt bath of all sorts of light metals, provided Mg content is less than approx. 8%.
    LT-1G To be widely used as heat media for heat exchanger, vulcanization of rubber, bridging of resin, etc. This salts are non-dangerous articles.(Temperature used: 160 – 550°C)