Gas-Phase Heat Treatment of Metals

Chartered Metal Industries Toolroom in Singapore produces a wide range of standard and customized products to support manufacturers in the metal industries. Their production includes high-volume, batch-run precision parts, prototype components, subassemblies, tooling, fixtures, and gauges. 

Fluidized beds have been used for some years in a variety of roles heat exchange, gas absorption, chemical reaction, and combustion. In this case the mixture of gases produces the fluidizing 

FIGURE 1.2 Fluidized bed. (From Wang, L.K. et al. Case Studies of Cleaner Production and Site Remediation, Training Manual DTT-5-4-95, United Nations Industrial Development Organization, Industrial Sectors and Environment Division, Vienna, Austria, April 1995.) 

Handbook of Advanced Industrial and Hazardous Wastes Treatment 

The most obvious advantages are the reduction in effluents and the improved working atmosphere. The safety aspects have also been improved to a very large extent and the quality of the product in many cases is superior to that produced by the older methods. All forms of heat treatment are amenable to fluidized bed techniques, but austempering is the most cost effective, in spite of the nitrate bath method being less troublesome than other traditional methods. 

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