Explanation
Iron and alloy of titanium used as steelmaking deoxidizer and alloy additive are generally called low ferrotitanium if the titanium content is 30%, medium ferrotitanium if the titanium content is 40%, and high ferrotitanium if the titanium content is 70%. Low and medium ferrotitanium is usually produced by aluminothermic method with ilmenite as raw material, so the aluminum content is generally high, between 8.0% -9.5%; High ferrotitanium can be produced by aluminothermic method with aluminum content between 3.0% -7.0%, or by remelting titanium sponge and waste titanium (called waste titanium type high ferrotitanium). GB/T3282-2012 has clear regulations on the grade and chemical composition of titanium iron. Titanium has a high chemical affinity with oxygen, nitrogen, sulfur, and carbon. ferrotitanium is used as deoxidizer and degasifier in steelmaking, and its effect is significantly higher than that of silicon and manganese. Titanium can form titanium nitride or titanium carbide in solid steel. The former can prevent grain growth at high temperature and modify sulfide in steel. It is widely used in micro titanium treated steel and carburizing gear steel; The latter can produce strong precipitation strengthening effect and is widely used in high-strength engineering structural steel. Titanium is widely used to stabilize stainless steel and steel due to its role in fixing non-metallic elements. Titanium used in cast iron helps to form fine grained graphite and significantly improves the wear resistance of cast iron. ferrotitanium is also the raw material for the production of titanium calcium type welding electrode coatings.
Classification
Metals -> Steels -> Iron