Ferrochromium alloy with very low titanium content and high carbon content and its production process

Abstract

The present invention is ferrochromium alloy with very low Ti content and high C content and its production process. The ferrochromium alloy is produced with high carbon ferrochromium as material, and through furnace smelting in a 'selective oxidation process', melting and skimming, mold casting and other steps. The ferrochromium alloy has the main components including Cr 45-75 %, C 4-10 %, and Ti 0.001-0.020 %. It is especially suitable for smelting high grade bearing steel. The present invention has the advantages of simple technological process, low production cost, low power consumption, less environmental pollution, etc.

Description

Technical field: [0001] The invention relates to a low-titanium high-carbon ferrochrome alloy used as a raw material for smelting bearing steel, which belongs to the technical field of metallurgical engineering, in particular to an ultra-low titanium high-carbon ferrochrome alloy which is especially suitable for smelting high-quality bearing steel and its production method. Background technique: [0002] As we all know, bearings are mechanical parts used to support the transmission shaft and bear the load. It is a commonly used wearing part in the mechanical equipment manufacturing industry, and its consumption is very large. The quality of the bearing will directly affect the performance of the mechanical equipment, and the quality of the bearing is mainly determined by the performance of the bearing steel material. With the rapid development of my country's bearing industry, the demand for high-quality bearing steel with excellent performance is also increasing. We know ...

AI Technical Summary

Problems solved by technology

However, the technical process of the "controlled reduction method" of controlling the amount of reducing agent has the following technical defects: firstly, it will significantly reduce the reduction of the main element chromium while controlling the amount of reducing agent to reduce the reduction of titanium in the raw material. Cr in the slag 2 o 3 The higher the content of chromium, the lower the recovery rate of chromium production and utilization; secondly, its smelting power consumption is high and the production cost is high; thirdly, the titanium content of the low-titanium high-carbon ferrochrome products it produces can only reach 0.02%∽0.05 %, generally speaking, it can only be used as a raw material for smelting ordinary bearing steel, and for the production of low-titanium high-carbon ferrochromium products with a titanium content as low as 0.02%∽0.03%, due to the actual The production process is difficult to control stably, its product pass rate is only about 60%, and the production cost will rise sharply accordingly

Therefore, the current "controlled reduction method" cannot produce ultra-low titanium high-carbon ferrochromium products with a titanium content of less than 0.02% required for smelting high-quality bearing steel

The titanium content of the most common high-carbon ferrochrome products is usually 0.10%∽0.30%. This high-carbon ferrochrome product with high titanium content is not suitable for the production of raw materials for smelting bearing steel.

So far, there have been no relevant literature reports on the smelting of ultra-low titanium high-carbon ferrochrome alloys with a titanium content of less than 0.02% and their production methods