Inoculation with an inoculant containing the 0-25 and 0-45 mm grain size fraction results in lower pearlite contents than in uninoculated samples at the investigated wall thickness. This is due to the reduced inoculation effect caused by the high content of silicon.
The combination of calcium and strontium in Barinoc inoculant provides a good chill control and good fading characteristics. It also improves the metal quality and allows higher Mg recoveries compared to other inoculants.
A new inoculant has been developed which is a high-performance inoculant for gray iron and ductile iron castings. The inoculant consists of low-silicon ferrosilicon with strontium, aluminum and zirconium. This inoculant is a great improvement over traditional inoculants which are used in the industry. It has been shown that it can significantly improve chill reduction, nodule count and mechanical properties of castings.
The inoculant can be made by combining the different constituents of the inoculant in dry form or as briquettes. It is then added to the molten bath of ferrosilicon in any conventional manner. The inoculant has a typical chemical analysis of 75% silicon, less than 0.1% calcium and the balance is iron with the normal amount of impurities.
The inoculant is particularly useful for corrosion-resistant cast iron and steam and water pressure gray iron which have strict requirements regarding the surface of the castings. It also reduces the problem of heavy slag formation in iron transfer vessels and pouring units.
Ferro silicon strontium barium inoculant is an effective reducing agent used for removing carbides and preventing spheroidizing of ductile cast iron. It can be used in conjunction with other reducing agents, such as sulfate, to eliminate the need for annealing and improve machinability. This product is available in different concentrations and sizes based on the application.
This type of inoculant is particularly useful in reducing chill depths. It is made from a special low calcium silica alloy containing strontium. Unlike normal inoculating grades of ferrosilicon, it is virtually free from aluminium. This eliminates the possibility of a detrimental reaction with aluminium in the melt and improves the inoculating performance.
A series of tests has been conducted to test the effectiveness of this inoculant in flake graphite and nodular cast irons. Melt No. 8 was divided into five taps, and increasing additions of special strontium bearing ferrosilicon with low calcium content were mixed into each. The eutectic cell counts were significantly higher and the chill removing effect was much more powerful than that of normal inoculating grades.
Ferro silicon strontium magnesium inoculant is a type of alloy that can be used as an inoculant for gray or ductile iron castings. It is formulated to remarkably reduce chill phenomenon, while generating little residue. It can be used as a dry mix or in the form of briquets that are added directly to the liquid iron. It is particularly effective when combined with calcium and barium nucleating agents.
This inoculant is primarily composed of 75% ferrosilicon and contains low levels of aluminum and calcium. In addition, its Strontium level is kept below 0.10% to avoid interference between it and the iron. IM SR also has a low amount of aluminum, which helps in minimizing the formation of dross.
The molten bath for the inoculant is made using a conventional submerged arc furnace. It is then mixed with a strontium metal or silicide and either zirconium or titanium-rich material. The result is a high-performance inoculant that can produce chill depths superior to those obtained with the commercial inoculant SUPERSEED, which had a typical chemical analysis of about 75% silicon, less than 0.1% calcium, a maximum of about half a percent of aluminum, and the balance of iron with ordinary residual impurities.
The inoculant can be used for a wide range of applications, including cold-rolled steel, hot-rolled steel, cast iron and ductile iron. It is also suitable for applications requiring high corrosion resistance, such as nickel ductile iron and steam and water pressure gray cast iron. It is also a good choice for reducing shrinkage and other casting defects.
The composition of the inoculant varies depending on the desired application. It can be based on either ferrosilicon or a copper-silicon alloy, and may contain other elements such as magnesium and zinc. The inoculant should contain a sufficient amount of silicon to produce a desirable nucleation effect.
It has been found that the addition of zirconium to a strontium-bearing inoculant increases its efficiency. The combination of zirconium and strontium is truly synergistic. It was discovered that an inoculant containing zirconium without strontium produces inferior results. It is also important that the inoculant has a low calcium content and a low aluminum content.
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