Reason analysis and improvemet of the non-conformity of 06Cr18Ni11Ti tube blank in non-destructive testing and intergranular corrosion
In response to the issues of defect detection and intergranular corrosion non-compliance in 06Cr18Ni11Ti tube billets,optical microscope and scanning electron microscope were used to detect and analyze the de-fects.The results indicate that the reasons for the failure of non-destructive testing and corrosion cracking are the same,both of which are due to the presence of a large number of 0.4-0.6mm large-sized chain like TiN inclusion clusters in the tube blank.By controlling the Ti content,Al content,and slag composition during the Ti alloying process,reducing the pouring temperature,and increasing the single pass reduction of the fast forging machine,it is beneficial to improve the qualification rate of non-destructive testing and intergranular corrosion.
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维普
