Search International and National Patent Collections
|1. (WO2016052523) METHOD FOR PRODUCING Ni-BASED SUPER HEAT-RESISTANT ALLOY|
|Title:||METHOD FOR PRODUCING Ni-BASED SUPER HEAT-RESISTANT ALLOY|
Provided is a method for producing an Ni-based super heat-resistant alloy capable of uniformly maintaining a glass lubricant coating even after being heated to hot forging temperature. In this method for producing the Ni-based super heat-resistant alloy, a forging stock which will form the Ni-based super heat-resistant alloy is coated with a lubricant, and hot forged. The method for producing the Ni-based super heat-resistant alloy is characterized by including: a preliminary oxidation step in which a Cr oxide film having a film thickness of 0.5-50 µm is formed in advance on the forging stock to obtain a preliminarily oxidized material; a lubricant coating step in which the preliminarily oxidized material is coated with a glass lubricant having borosilicate glass as a main component thereof, to obtain a material to be forged; and a hot forging step in which the material to be forged is hot forged to obtain a hot-forged material.