Baoji Dingding Titanium | Corrosion resistant core of marine power with titanium alloy forgings for ship engine impellers

As the "heart component" of the ship's power system, the impeller of the ship's engine is subjected to the triple test of seawater corrosion, high-speed load, and alternating stress for a long time. Its reliability directly determines the navigation safety and endurance of the ship. Baoji Dingding Titanium Products Co., Ltd. is based on the forging technology advantage of "China Titanium Valley" and specializes in the research and development of TC4, TC11, TA2 and other grades of titanium alloy impeller forgings for ship scenarios. Through the "military grade forging+ocean working condition adaptation" process system, the precision of impeller blades is ≤ 0.02mm and the fatigue cycle resistance reaches 10 times, perfectly adapting to the engine needs of various types of ships such as frigates, destroyers, and ocean going cargo ships.

1、 Core advantage: Why choose titanium alloy forgings for ship impellers?

Compared to traditional ship steel and copper alloy impellers, titanium alloy forgings have significant advantages in comprehensive performance in marine power scenarios, solving the long-standing problems of corrosion and wear on ship equipment

High marine corrosion resistance

The dense oxide film formed on the surface of titanium alloy can resist the erosion of seawater, salt spray, and marine microorganisms. The corrosion rate after 5000 hours of salt spray testing is ≤ 0.0002mm/year, which is 15 times longer than the service life of copper alloy impellers and completely solves the pain point of "annual replacement and maintenance" of impellers.

High load fatigue resistance performance

The tensile strength of TC4 titanium alloy impeller is ≥ 960MPa, and the TC11 grade can reach 1000MPa. After multiple rounds of forging, the grain size is refined to 2-3 μ m, which can withstand the instantaneous impact load during the start-up and acceleration of ship engines. The fatigue resistance is 60% higher than that of steel impellers.

Lightweight and energy-saving advantages

The density is only 4.51g/cm ³, which is 45% lighter than steel impellers of the same specification. It can reduce engine start-up energy consumption and operating inertia, and improve ship fuel efficiency by 8% -12%. Calculated based on a 100000 ton cargo ship, it can save fuel costs of over one million yuan per year.

Wide temperature range stability characteristics

Stable performance in a wide temperature range of -50 ℃ (polar waters) to 450 ℃ (engine high temperature zone), without the risk of low-temperature brittleness or high-temperature creep, suitable for complex temperature changes in ocean navigation, and ensuring continuous output of the power system.

2、 Ship specific grades and customized specifications: precise matching of ship types

We provide exclusive titanium alloy impeller forging solutions for different power requirements of military ships, civilian merchant ships, and special ships, covering a full range of specifications from micro auxiliary engines to large main engines

Supporting customization of impellers with different structures such as axial flow and centrifugal, blade surface optimization and balance accuracy debugging can be carried out according to the ship engine model (dynamic balance accuracy reaches G1 level). Military impellers can provide non-magnetic treatment, and the entire process from forging to finished product delivery can be as low as 30 days.

3、 Core application scenario: Suitable for military and civilian ship scenarios

1. Military ship field: Military grade power support

Titanium alloy impeller forgings are the "safety barrier" of military ship power systems, suitable for extreme combat and navigation needs:

-TC11 titanium alloy impeller is used for destroyer gas turbines. Under high temperature of 450 ℃ and high-speed operation at 18000rpm, the blades are not deformed or broken, and can withstand the vibration impact of naval gun firing, ensuring stable output of the power system;

-The non-magnetic TC4 impeller is compatible with the auxiliary power system of nuclear submarines, avoiding magnetic field exposure and improving ship concealment. It is also resistant to deep-sea high pressure and seawater corrosion, and can work stably at a depth of 300 meters.

2. In the field of civilian merchant ships: an efficient and energy-saving economic choice

In response to the long-distance demand of ocean going cargo ships and passenger ships, titanium alloy impellers achieve the goal of "low maintenance, high energy saving":

-TA2 pure titanium impeller is used for the main engine cooling system of 100000 ton container ships, with no corrosion loss within a 5-year service life. Compared with traditional copper alloy impellers, it reduces maintenance frequency by 90% and reduces crew workload;

-The TC4 lightweight impeller reduces the engine load of ocean going passenger ships by 45%, increases the start-up response speed by 20%, and can quickly adjust power in sudden storms, improving navigation safety.

3. Special ship field: adaptation tools for extreme environments

In special ships such as research vessels and icebreakers, titanium alloy impellers exhibit superior environmental adaptability:

-The polar research vessel adopts TC4 titanium alloy impellers, which have no risk of brittle fracture in polar waters at -50 ℃. The blades can resist the impact of floating ice, ensuring the continuous advancement of scientific research missions;

-The impeller of the hydrological detection equipment on the ocean survey ship is made of TA2 pure titanium material, which is resistant to seawater corrosion and has no biological attachment, ensuring accurate detection data. It has served multiple ocean scientific research projects.

4、 Ship level quality assurance: full process military industrial control

1. Military grade control of raw materials: High purity sponge titanium with a purity of ≥ 99.8% is used, which is melted at least 4 times in a vacuum consumable electric arc furnace to ensure that the composition of the titanium ingot is uniform and free of segregation. Each batch of raw materials is accompanied by a composition report recognized by the National Defense Science and Technology Commission, which can be traced throughout the entire process;

2. Customization of forging process: Based on the characteristics of ship impellers, the "CNC fast forging+isothermal forging" process is adopted. The forging ratio of the blade part is ≥ 5:1, ensuring that there is no stress concentration in the transition zone between the blade and the hub, and the density of the impeller is ≥ 99.9%;

3. Special testing for marine conditions: All have passed ultrasonic testing (military grade I acceptance), corrosion resistance testing in marine environments, high and low temperature fatigue testing, dynamic balance testing, and additional impact toughness and non-magnetic performance verification for military impellers;

4. Surface strengthening treatment: Surface strengthening processes such as plasma spraying and anodizing can be provided to further enhance the corrosion resistance and wear resistance of the impeller, and adapt to the corrosive environment of different sea areas.

Baoji Dingding Titanium: Core supplier of titanium alloy impellers for ships

The company is located in Baoji High tech Zone, known as the "Titanium Valley of China". It has core equipment such as a 5000mm CNC vertical lathe, five axis machining center, and 2000 ton fast forging machine, with an annual production capacity of 800 tons. It has passed the national military standard GJB9001C and is qualified for military ship matching. The product has served multiple domestic shipbuilding enterprises and military research institutes, becoming the preferred partner for titanium alloy impellers in ship engines.

Technical advantage: Precision forming of ship impeller surface and non-magnetic processing capability

Complete qualifications: National Army standard, ISO9001 certification

Service guarantee: ship power system adaptation solution, lifelong technical support