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The adverse effect of titanium on austenitic stainless steel
Source:Xinsteel Date:2020/7/7
The addition of titanium can prevent intergranular corrosion of stainless steel, but it also brings adverse effects.
For example, the addition of titanium increases the viscosity of the steel and reduces the fluidity, which makes the continuous casting process of stainless steel difficult. The addition of titanium deteriorates the surface quality of the steel ingot and billet, which not only increases the grinding amount of the steel ingot and billet in the metallurgical plant, but also Significantly reduce the steel production rate, thereby increasing the cost of stainless steel; the addition of titanium, due to the formation of TiN and other non-metallic inclusions, reduces the purity of steel. Not only deteriorates the polishing performance of steel, but also because TiN and other inclusions often become a source of pitting corrosion, which reduces the corrosion resistance of the steel; after welding, titanium-containing stainless steel is prone to knife-like corrosion along the weld line under the action of the medium after welding It also causes corrosion damage to the welded structure.
Due to the above shortcomings of titanium-containing stainless steel, in the United States and other countries with the largest stainless steel production, the production of stainless steel 321 accounts for only 1%-2% of the production of Cr-Ni stainless steel.
