Method for homogenizing the compositions and mechanical performances of nickel-based material brazed joints

US10858724B2 · kind B2 · utility

Assignee

• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN

Inventors

• Wenchun Jiang · Nanhu, CN
• Shandong Tu · Shanghai, CN
• Lei Ge · Shanghai, CN
• Chaohe Yang · Damaishan, CN
• Xiang Ling · Nanjing, CN
• Jianming Gong · Qingdao, CN

Key dates

• Filing date: Jan 15, 2018
• Grant date: Dec 8, 2020
• Expiry date: Oct 2, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/02
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for homogenizing the compositions and mechanical performances of nickel-based material brazed joints, includes three homogenized manufacturing steps: Step I, assembling the welding sample, placing it into the vacuum furnace, and then heating up to 830˜860° C. and holding the temperature; then heating up again to 1050˜1100° C. and holding the temperature; allowing for slow self-cooling in vacuum till it reaches 620˜640° C.; then filling the furnace with nitrogen and starting the vacuum furnace fan at the same time, so that the sample is cooled down to 40˜60° C.; Step II, raising the temperature up to 1140˜1160° C. and holding, then cooling it down to the room temperature through water-quenching; Step III, raising the temperature of the welding sample up to 680˜750° C. again, and cooling it down to the room temperature through air cooling.