Agriculture Industry
Cement Industry
Construction Industry
General Use Industry
Hardfacing for Mines and Quarries Brochure
Hardfacing Tubular Electrodes
Inlay Hammers case history
Mig Tungsten Carbide In The Mining Industry
Overlay Plate Industry
Railroad Repair Brochure
Scrap Metal Recycling Industry
Sintered Tungsten Carbide Data Sheet
Sugar Cane Hardfacing Trifold Brochure
Tire Shredding Brochure
Tungsten Carbide Process
Uni lance brochure
Wood Mulch Shredding Industry
Pigment Sweeps Case Study
Application
Overview
An elaborate array of Nickel piping is used in the cooling of TiO2 ( Titanium Dioxide) compound directly from the reaction chamber. As it enters the piping system, it is under very high temperature and velocity. Additions of salt are also introduced to aid in a scrubbing action. The environment is extremely corrosive and abrasive, resulting in high maintenance of sweeps and elbows within the piping system. A complete erosion of wall thickness has been known to occur in less than nine months. Reconditioning the sweeps with weld metals of similar chemistry of the piping prevents discarding the expensive component but does little to extend its overall life. However, extensive and significant component life can realized by the application of proper hardfacing materials and procedures.
Sweeps can be rebuilt successfully by cutting a series of windows in the inner radius thus exposing the inside of the outer radius. A thorough cleaning of the surface is necessary to ensure proper bonding of the weld metal. The worn area can be rebuilt to size with welding products whose properties closely match the base material. Once this is complete, the proper application of one of three Postalloy Nickel Base products will guarantee maximum component life. A recent application of one layer of Postalloy 2813-MCG to a major pigment manufacturer’s sweep resulted in essentially no wear after nine months. According to the Maintenance Manager, “The weld spatter was still present after 9 months of service”. The Maintenance Manager is now considering applications in other highly wear prone areas.
The choice of Postalloy Nickel Base products should be selected upon the level of hardness and corrosion resistance desired. The higher the hardness, the more hard particles present in the deposit and the higher the abrasion resistance and the lower the corrosion resistance. It is suggested that Postalloy 2813-MCG act as the initial selection because of its intermediate hardness and corrosion resistance. A shift to either higher or lower hardness can be made after preliminary inspection.
Production Selection
Postalloy 2812-MCG Machinable deposits. High corrosion resistance. Least abrasion resistant. Hardness 35 to 40Rc.
Postalloy 2813-MCG Deposits finished by grinding. Intermediate corrosion and abrasion resistance, Hardness 45 to 50 Rc.
Postalloy 2814- MCG Deposits finished by grinding. Highest abrasion resistance, least corrosion resistance. Hardness 55 to 60 Rc.
Postalloy®AR Inlay Process (Patent - 20150115085)
Frequently Asked Questions About Hardfacing
Determining How Much Hardfacing is Required
Lbs of Hardfacing needed for different products and application types
Hardfacing Wood Chipper Knives
Our application guide to get the longest life from hardfaced wood chipper knives
Hammer Balancing Technique
Technique for rebuilding hammers
Guidelines For Applying Hardfacing Alloys
From surface preparation to hardfacing patterns, these guidelines show best practice during application.
PS-11W for Stabilizers
Our procedure to apply PS-11W tungsten carbide MIG wire to Stabilizers
POSTALLOY® A-Max Wear Plate Installation
A handy guide to installing our A-Max Wear Plates
Recommended Welding Parameters and Wire Feed Speeds
Our suggested Amps, Volts, and Wire Feed Speeds for specific products.
Postalloy® Tubular Hardfacing Electrodes
Postalloy® Tubular Hardfacing Electrodes are more efficient than Conventional Extruded Hardfacing Electrodes - here's why.
