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DIS Metallurgical Service
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We can provide value added solutions in metallurgical processes and crankshaft manufacturing through Innovation

In 2015 there were 15 million vehicles produced in the U.S. all requiring a crankshaft. DIS Metallurgical Service provides a solution to produce those crankshafts using a low-cost production method.


Utilizing an innovative manufacturing solution for crankshaft production based on DIS Metallurgical Service U.S. Patents: 9,095,891 and 9,254,518, will provide a savings factor of up to 30%. The metallurgical quality of the crankshafts would be competitive to current industry standards.


DIS Metallurgical Service evaluated our DISFOR process as described in US Patent 9,095,891 and achieved following properties:

  • AISI 4340 was used in experiments

  • Welded and quench and tempered journal of a crankshaft had impact properties 30 ft-lb at -20⁰F

  • Welded, DISFOR treated and Quench and tempered journal of the crankshaft had impact properties 58 ft-lb at -20⁰F

  • Welded, DISFOR treated, quench and tempered journal had the same mechanical properties as a solid crankshaft journal

  • Microstructure of welded , DISFOR treated, quench and tempered journal was the same or very similar to the microstructure of solid crankshaft having same thermal and forming history

  • There is no evidence of HAZ in welded, DISFOR treated and quench and tempered journal

  • There is evidence of HAZ in welded and quench and tempered journal

  • Welded DISFOR treated crankshafts have continuous grain flow (CGF)

  • All impact, mechanical and microstructural testing were completed by independent metallurgical lab

  • All welding and DISFOR related processes were completed by US companies


What the DISFOR process means to your operation:
  • DISFOR Process provides lower investment, operational, better productivity and same or better quality

  • DISFOR Process is suitable for manufacturing of any size crankshafts

  • DISFOR Process provides 10-20 % input materials savings due to absence of trimming operation

For additional information about our DISFOR Process, please download our presentation:
"Method of Eliminating the Heat Affected Zone in a Welded Crankshaft–DISFOR process"
Method of eliminating the heat affected zone in a welded article United States US 9,254,518 Issued January 2016

Inventors: Dusan Milicevic

Method of eliminating the heat affected zone in a welded crankshaft United States US 9,095,891 Issued August 2015

Inventors: Dusan Milicevic

A method of manufacturing a crankshaft comprising providing two parts, each part comprising two webs, a portion of crank journal and a portion of main journal, welding together the two portion of main journal, heating the crank journal, inserting the shim between the webs, and upsetting forging to reduce the length of the crank journal to form a forged segment. Alternatively , the portion of main journal may be welded , heated , shimmed, and forged to form a forged segment. The shaft is lengthened by additional parts or forged segments using the same steps. A production line for carrying out this method when producing a crankshaft with n number of crank journals, where n is an even integer.


DIS Metallurgical Service

Dusan Milicevic, President

Phone:630 324 6678

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