1、 Additive Manufacturing Technology: Achieving Integrated Forming of Complex Structures

1. Laser powder bed melting

Northwestern Polytechnical University has developed an alternating parameter forming process, which achieves 100% equiaxed microstructure in TC4 titanium alloy by periodically switching laser power and scanning speed. The mechanical anisotropy is reduced to<5%, and the tensile strength uniformity reaches 1050 ± 25 MPa.

Electron beam melting reduces the oxygen content to<800 ppm in a vacuum environment, significantly improving the fatigue life of components to 10 ⁷ cycles.

2. Application landing

In the aviation field, the CJ-1000A aircraft engine uses Ti-48Al-2Cr-2Nb turbine blades formed by EB-PBF, which reduces weight by 50% and has a temperature resistance of 750 ℃.

In the energy field, the production cycle of 3D printed irregular flanges has been shortened by 60%, and efficient customization of components with a diameter of less than 800mm has been achieved.

2、 Precision machining technology: overcoming the challenges of high precision and stability

1. Micro scale boring system

AVIC Changfei has developed a specialized boring system in collaboration with Shangao Cutting Tools, targeting the machining of large aspect ratio holes in titanium alloys. The cutting amount is ≤ 0.004 mm, and the aperture accuracy reaches H7 level.

2. High performance lubricating medium

Xi'an University of Architecture and Technology has developed a black phosphorene based lubricating medium, which has a load-bearing limit exceeding 1.8 GPa and a 3-fold extension of anti-oxidation aging at 600 ℃, resulting in a significant increase in the finished product rate of aircraft engine blades from 65% to 92%.

3、 Adaptation upgrade for deep-sea and high-pressure scenarios

1. Deep sea connection technology

TC11 titanium flange adopts flange type mechanical connection in sea areas deeper than 500 meters through optimized forging process, improving compressive strength by 30% and meeting the requirements of deepwater oil pipeline reconnection.

2. Innovation in High Pressure Sealing

The optimized design of the sealing surface between the T-shaped groove flange and the ZY-LOC high-pressure self tightening flange enables the octagonal gasket to deform uniformly under internal pressure, significantly improving the sealing reliability of petrochemical pipelines under high-pressure conditions.

4、 Upgrading the Standard and Intelligent Manufacturing System

1. New standard process specifications

GB/T 9119-2025 Strengthening Forging Process Requirements: The outer slope of the neck of the flange with a neck should be ≤ 7 °, and it is mandatory to require 100% non-destructive testing for butt welds.

2. Intelligent traceability system

Starting from 2026, industrial pipeline flanges will be required to be equipped with RFID tags, combined with the "flange cloud" platform to achieve full lifecycle data traceability, reducing the accident rate by 23%.

5、 The impact of industry transformation

Chemical/Energy: Additive manufacturing of irregular flanges+composite welding sealing surfaces, with a lifespan extended to 15 years;

Ocean engineering: Deepwater flange mechanical connection+TC11 compression optimization, reducing operation and maintenance costs by 40%;

Aerospace: equiaxed crystal turbine blades+micro hole precision machining, improved thrust to weight ratio, optimized fuel efficiency.

Future trend: Titanium flange manufacturing is accelerating towards high-performance integration, green manufacturing, and cross domain adaptation.