High Chrome Steel Ball Mill Liner Plate

Advantages of Adopting Our High Chrome Steel Ball Mill Liner plate Users are normally mentioning only chemical composition and hardness of High Chrome Steel Ball Mill Liner plate in their enquiry which is not sufficient for assessing/ comparing quality level of these items from different manufacturers. The metallurgy involved in High Chrome Alloys is highly complex and also the manufacturing technology adopted by different manufacturers which necessitates full understanding of alloy characteristics and production technologies for developing full confidence in the manufacturer and the product. It is an established fact that Marten site phase and chromium carbides have maximum wear/ abrasion resistant properties and as such microstructure evaluation should be given maximum weight age at the time of comparing quality from different manufacturers. An ideal High Chrome Alloy should reflect following micro-structural characteristics.

• Proper contents of Chromium Carbides (Cr7 C3) should be at least 25-30% of volume.
• These carbides should be well disconnected and properly distributed in Martens tic Matrix which is possible only by proper balancing of chromium and carbon contents in the alloy.
• Occurrence of austenite, Pearlites and ferrites should be as low as possible which is only possible by designing proper heat treatment cycle.
• All these micro-structural features are observed on High Magnification Metallurgical Microscope and are absolutely necessary for providing proper wear resistant characteristics in high chrome alloys.
• We guarantee for the following advantage from our High Chrome Liners.
• Consistent Quality: Although all manufacturers are now equipped with spectrometer but due to constraint of time factor because of Heat cycles of 45-60 minutes, it is not practically possible to analyze chemical composition of bath samples of each heat. It is, therefore, most important to use only consistent quality of inputs. We have, therefore, restricted commercial grade of scrap in our factory and are using only selected qualities of scrap with known composition for getting consistent quality of these items well within specifications.
• Excellent Surface Finish: Unlike other manufacturers, we are using facing sand with 100% of fresh silica sand for getting good surface finish. Our fresh sand consumption is 2-3times compared to others. Perfect Sound Castings: Yield is known as ratio of net casting weight v/s gross weight e.g. if 70kg of casting is manufactured from 100 kg liquid metal poured, Yield becomes 70%. Manufacturing cost reduces with increase in yield percentage but still we are normally maintaining yield percentage of 60 – 65% for getting perfect sound castings from High Chrome Alloys.
• Properly Designed Heat Treatment Cycle: For achieving desired physical properties and microstructure level, High Chrome Casting have to pass through properly designed heat treatment cycle consisting of heating to specific temperature, soaking for certain period depending on thickness of castings and Cr percentage followed by proper air quenching and then tempering in electric furnace for relieving stresses developed during Heat treatment. Heat treatment cost can be drastically reduced if only hardness is to be provided but we are spending more on heat treatment of liners for improving micro-structural features which are necessary for achieving low wear rate.
• Low Specific Energy Consumption and Wear Rate due to Guaranteed Micro-Structural Features with optimum carbide quota and high reliability against breakage.
• Completely free from all type of casting defects due to closely monitored manufacturing process.
• Full Functionality during whole lifetime due to feature of retaining the shape for long time.