In titanium rod exist in two shapes, one is free of carbon (graphite), primary exists in casting titanium, the other is a compound carbon (titanium carbide), primary exists in steelmaking raw titanium, titanium carbide hard and brittle, plasticity, low content of proper progress strength and hardness of the titanium rod, content is too much, makes the titanium rod difficult to cut cut processing, this is the cause of the steelmaking raw titanium cutting function is poor. Graphite is very soft and low strength, and its presence can add the casting function of titanium rod.
During the process of titanium production, the refractories forming the titanium orifice were eroded, the diameter of the orifice increased and the depth shortened. When the titanium hole is blocked, the eroded part must be restored to its original state to maintain the depth of the titanium hole. Therefore, the key problem to block the titanium mouth is to increase the depth of the titanium mouth or increase the length of the horizontal mud bag. In general, when plugging the titanium mouth, the amount of gun mud is much more than the amount needed to fill the space inside the titanium mouth, usually twice the volume inside the titanium mouth. The depth of the titanium hole cannot be increased without the injection of excessive gun-mud. If there is nothing but titanium water or slag in the titanium mouth area of the furnace, the mud into the hearth is heated rapidly and will break into small pieces that float upward. To increase the depth of the titanium hole, the gun-mud must be bonded to the old mud around the titanium hole and stay there for a period of time to form a whole with the later mud. Therefore, the titanium mouth area in the furnace must have a space to contain the mud, so that the main part of the mud bag surface is covered by the dead column, the titanium mouth depth can be increased.
Silicon (Si) :
It can promote the carbon in the titanium rod to become graphite, can deoxidize, can also reduce the gas hole of the casting, can improve the fluidity of molten titanium rod, reduce the casting shortening, but contains too much silicon, will also make the titanium rod become hard and brittle.
Manganese (Mn) :
Soluble in titanium and cementite. When producing titanium in blast furnace, proper manganese content can improve the casting function and cutting function of titanium rod.
By means of the pre-set mud bag, the stable titanium channel can be formed in the initial period of the blast furnace, thus maintaining the depth of the titanium channel. After the blast furnace is opened, if the ramming material is worn away by slag and coke ore layer, the gun-mud will float off no matter how much it is pushed into the blast furnace, and the depth of the titanium mouth will not be increased. It is necessary to make the shot mud form mushroom shaped mud head in the furnace charge, which can withstand the erosion wear of titanium water circulation, and can be drilled in the next opening process to ensure the stability of titanium production.
Phosphorus (P) :
Attribute to harmful element, but phosphorus can make the fluidity of titanium water is added, this is because sulfur reduced the melting point of raw titanium, so in some products often contain high phosphorus content. However, the presence of phosphorus makes titanium add hard brittleness, excellent raw titanium phosphorus content should be small, sometimes in order to add liquidity, phosphorus content can be up to 1.2%.
Sulfur (S) :
It is a harmful element in titanium rod, which promotes the connection between titanium and carbon, makes titanium hard and brittle, and forms titanium sulfide with titanization with low melting point, so that raw titanium produces hot brittleness and reduces the fluidity of titanium liquid. Titanium rod with high sulfur content is not suitable for casting fine parts. The rule for sulfur content in cast titanium rod shall not exceed 0.06% at most.
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