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Heat treatment is another important factor influencing grinding balls quality. The high quality grinding balls shall be tough and uniform in hardness. Iraeta has introduced Spanish technology and worked with the institution experts to develop the unique complex heat treatment craft. By repeated hardening, the hardening liquid temperature control, the continuous tempering, etc., Iraeta’s steel ball have better performance in the volume hardness uniformity and the overall wear resistance.


 Hardening liquid temperature control                                                                 

 Hardening treatment 

Repeatedly hardening   


Continuous tempering

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We only choose formal steel groups
in China as our suppliers.