LAMINATED WHITE IRON/STEEL COMPOSITE WEAR PLATE HISTORY
Globally many companies today offer white iron products. What sets Laminite apart is CRs commitment to consistent quality. In the harshest operating environments mine sites risk significant downtime when an inferior white iron product fails through de-lamination and porosity in the castings. Quality assurance from start to finish means CR’s Laminite has the right foundry, heat treatment processes and a reliable proven wear life that outperforms industry standards by 15%.
Cast martensitic white iron castings, widely used in the mining industry for many years, have very high resistance to abrasive wear but have poor mechanical properties which limit their usefulness in applications involving impact stresses e.g. coarse ore handling. By vacuum brazing cast white iron to a steel backing plate the most useful properties of each of these quite ordinary materials are combined in the form of a composite with much improved mechanical properties
The significant engineering feature of this development is the strategic positioning of the steel backing plate. This partnership contributes a significant degree of effective toughness to the otherwise brittle cast white iron component of the composite, while providing the useful option of being able to weld the wear part into position. The success of this product depends on the high alloy mix of the white iron and the reliability of the vacuum brazing process. Done correctly, it achieves a good brazed joint along with full hardening of the long wearing white iron in the rapid nitrogen quench. A great range of plates and bars can be made, and in fact over the last forty years more than 3000 different sizes have been produced and distributed world-wide.
ABOUT THE INNOVATOR:
The original concept of this laminated plate and early development work was carried out by Philip Kempe, a mechanical engineer working with Canada Iron Foundries in the 1960’s and won an ASM award at one of their annual Materials Awards Competitions. This was followed by a few successful field trials in Canada, but eventually led to major market penetration in Australia into new hard rock mining operations. Marketing and product development, firstly, at the old firm of Mason & Cox Foundries in South Australia, then continued under CQMS Razer’s ownership, and led to the establishment of the product globally. Today laminated plate is a major product line distributed world-wide.