Case-hardening (surface hardening) by vacuum heat treatment is widely used like with gears, transmission shafts, bearing parts, dies or drills. ALD provides Heat Treatment as a toll processing service to harden your parts at high quality and low distortion. Thermal treatment furnaces utilize processes like LPC (low pressure carburizing) and HPQG (high pressure gas quenching) and are widely applied in the automotive sector and in mechanical engineering.