Ald Thermal Treatment Inc

2656 24th St
Port Huron,  MI  48060-6419

United States
810-300-1437
http://www.aldtt.net
  • Booth: 3022

ALD Thermal Treatment Inc. – USA/Mexico Founded in 2006, ALD Thermal Treatment Inc. is the premier source for Vacuum Heat Treatment Services to the Precision Manufactured Component Segment in USA & Mexico. ALD is the industry leader in controling heat treat distortion, greatly reducing or eliminating the need for post heat treat machining or grinding.

ALD has received the GM Supplier Quality Excellence Award for 5 years running. 1 billion parts shipped, 0 field ppm.

Technologies:

  1. Low Pressure Carburizing (LPC)
  2. Neutral hardening in vacuum
  3. High Pressure Gas Quenching- 20 bar N2/He
  4. Nitriding
  5. Vacuum brazing at high temperatures
  6. Annealing in vacuu
  7. Thermal de-oiling
  8. Pre-cleaning
  9. Cryogenics
  10. Tempering
  11. Shot peening
  12. Shot blasting
  13. Metallography
  14. Distortion Analysis
  15. Heat Treatment Consulting
  16. Design of heat treatment fixtures


 Products

  • Low Pressure Carburizing- LPC
    Low Pressure Carburizing (LPC) is also known as Vacuum Carburizing. Typical applications include gear parts, machine components, bearing components as well as injection systems for engines....

  • Low Pressure Carburizing (LPC) is also known as Vacuum Carburizing. Similar to other case hardening processes, the goal of Vacuum Carburizing is to obtain a part with a solid, tough core and a hard, wear-resistant surface. LPC has been established as the prefered case hardening process for critical applications and components with tight tolerances. It is applied to increase the fatigue limit of dynamically loaded components. Typical applications include gear parts, machine components, bearing components as well as injection systems for engines. Case hardening essentially consists of three steps. The parts are first austenitized, then carburized and once the required carbon profile is reached, they are quenched which is followed by a tempering step.

    The LPC process takes place in a temperature range between 870 °C to 1050 °C with a pressure range between 5 mbar and 15 mbar. In most cases the vacuum carburizing temperature is between 920 °C and 980 °C. During the complete process, the treated components are not exposed to any traces of oxygen eliminating IGO.

    When combining Low Pressure Carburzing (LPC) with High Pressure Gas Quenching (HPGQ), the process provides the following advantages compared to traditional Gas Carburizing combined with Oil Quenching:

    • excellent carburizing homogeneity even for components with complex shape
    • avoiding intergranular oxidation (IGO) and surface oxidation
    • clean, shiny surfaces after heat treatment, no washing of parts necessary
    • environmentally friendly process (small consumption of resources; no disposal of oil, salt bath residues or detergent residues)
    • potential to reduce heat treat distortion (unwanted changes of the part-geometry during heat treatment in form and size)

    All standardized case hardening steels such as 4120, 4320, 5120, 5130, 52100, 8625, 9310, 18CrNi8, 20MnCr5, 27MnCr5, 18CrNiMo7-6, 8620 (for small parts), 16MnCr5 (for small parts), can be treated with LPC and HPGQ. The core hardness after treatment will of course depend on the geometry of the treated components and on the hardenability of the chosen steel grade

  • High Pressure Gas Quenching (HPGQ)- 20 bar helium
    During High Pressure Gas Quenching (HPGQ) previously austenitized respectively thermochemically treated parts are quenched in an inert gas flow in a pressure range between 1 bar and 20 bar with gas velocities between 0,5m/s and 20m/s....

  • High pressure gas quenching is an environmentally friendly and low distortion quench process compared to liquid quenching such as oil, polymer or water. The “dry” gas quenching has the following advantages compared to liquid quenching:

    • Clean, shiny parts after heat treatment, no washing is necessary
    • Environmentally friendly process (no disposal of oil, salt bath residues or detergent residues)
    • Full flexibility to control quench intensity
    • Potential to reduce heat treat distortion (unwanted changes of the part-geometry during heat treatment in form and size)

    For the heat treatment of tool steels and high speed steels HPGQ is the preferred choice and has almost completely replaced liquid quench media, which was used in former times. By enhancing gas pressure and gas velocity as well as through the development of separate quench chambers, or so called “cold chambers”, HPGQ has become established also for the hardening of low alloyed casehardening steels and quenched and tempered steels. To date, primary applications of HPGQ in ”cold chambers” are gear components (wheels, shafts, synchronizers), bearing rings and components for fuel injection systems (nozzles, pump-heads etc.). Over the last few years the technology of Low Pressure Carburizing (LPC) in combination with HPGQ has become a preferred choice for the treatment of gear components for manual and automatic transmissions for passenger cars

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