Today, we did a pre-delivery inspection and found that one piece 1. 2379 round bar had crack on the surface. Why is this?And how to avoid crack?
Material Quality:
Non-Metallic Inclusions: Presence of impurities such as oxides or sulfides can create weak spots that lead to cracks.
Segregation: Uneven distribution of alloying elements can cause localized weaknesses.
Heat Treatment:
Improper Quenching: Rapid cooling can induce thermal stresses, leading to surface cracks.
Inadequate Tempering: Insufficient tempering can result in residual stresses and surface brittleness.
Forging and Rolling:
Insufficient Forging: Inadequate working of the steel can leave internal stresses that surface as cracks.
Improper Rolling Temperatures: Rolling at incorrect temperatures can cause thermal stresses and cracks.
Surface Contamination:
Foreign Particles: Contaminants on the surface during processing can create initiation points for cracks.
Oxidation: Oxidation during heating can lead to surface weakening.
How can we avoid Crack?
As a stockist,Otai special steel , it is difficult for us to improve this problem from the production process, but we can choose high-quality mills for you, such as Baosteel, Dong bei Steel, Fushun Steel, Tiangong, etc.
Use high-quality raw materials with minimal impurities.
Conduct thorough chemical analysis and non-destructive testing (e.g., ultrasonic testing) to detect internal defects before further processing.
Perform regular inspections at various stages,like after production,delivery to our stock and before delivery , to identify and rectify defects early.
We can supply stable and good quality steel,If you have any commons,please contact us to discuss.
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