Soft Foil Resistance Nicr Alloy Fecral 0cr20al5 For Glass Top Hot Plates

Soft Foil Resistance Nicr Alloy Fecral 0cr20al5 For Glass Top Hot Plates

Detailed description: 

Ferrochromium alloy is commercially produced from chromite by silicotheric or aluminothermic reations and chromium metal by roasting and leaching processes followed by reduction with carbon and then aluminum. Chromium metal is of high value for its high corrosion resistance and hardness. A major development in steel production was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Stainless steel and chrome plating (electroplating with chromium) together comprise 85% of the commercial use.

An ultra-low carbon ferrochrome alloy and a titanium production process

FIELD

: The present invention relates to a low carbon ferrochrome titanium alloy used as a starting material bearing steel smelting, belongs to the field of metallurgy engineering, particularly suitable for a particularly high-quality bearing steel smelting ultra-low carbon ferrochrome alloy and titanium production method.

Background technique

: Is known, for supporting the drive shaft and bearings are subjected to load mechanical parts, machinery and equipment manufacturing industry which is in a common wearing parts, using enormous quantities consumed. Bearing performance will directly affect the quality of mechanical equipment, and the quality of the bearing are primarily made of bearing steel material properties determined. With the rapid development of China's bearing industry, the demand for the number of high-quality bearing steel has excellent properties are also increasing. We know that: ordinary bearing steel is the use of titanium-containing lower amounts of low carbon ferrochrome as the raw material of titanium from the smelting, low carbon ferrochrome titanium raw material titanium content of impurities detrimental directly affects the quality of steel, an important bearing technical indicators harmful impurities in the form of TiO2 is titanium distributed in the bearing steel material, it will damage the crystal structure of bearing steel resulting in a substantial decline in wear resistance and mechanical strength. Thus, the amount of titanium required low titanium containing high-carbon ferrochromium low as possible, which is of high quality bearing steel smelting basic raw material conditions. For now, it is used in ferroalloy production "Reduction Control" to produce a low carbon ferrochrome product for smelting a titanium steel bearing raw material, it is the choice of a low titanium chrome ore as raw material, coke as a reducing agent , in the submerged arc furnace for smelting and slag by controlling the amount of reducing agent selected type. However, such control reducing the amount of "control reduction" process technology there are the following technical disadvantages: First, it is while controlling the amount of reducing agent to minimize the reduction of titanium feedstock, will significantly reduce and restore the main elements of chromium so that the content of Cr2O3 in the slag increases, so that the production is reduced using chromium recovery; smelting secondly its high power consumption, high production costs; third, it produces the titanium content of a low carbon ferrochromium product can titanium 0.02% ∽0.05% to reach a lower level, in general, it can only be used as a raw material of the plain bearing steel smelting, the requirements for the production of low titanium content of 0.02% ∽0.03% low carbon ferrochromium product of titanium , because the technology is difficult to stably controlled actual production, its products pass rate was 60%, and a sharp rise in the cost of production will follow. Thus, the current "control reduction method" can not produce ultra-low carbon ferrochrome alloy products of titanium, the titanium content is less than 0.02% of high-quality bearing steel smelting required.

Chemical Composition and Main Properties of FeCrAl Alloy