1. What Titanium Casting Is
Titanium casting is the production of titanium components by pouring molten titanium into a mold, using investment casting, graphite mold or rammed graphite processes. The development history of nickel-based casting high temperature alloys produces complex shapes that are difficult or expensive to machine from solid material, with the corrosion resistance and strength of titanium.
2. The Casting Process
Titanium is melted in a vacuum or inert atmosphere because of its high reactivity with oxygen and nitrogen at elevated temperature. The molten metal is poured into the mold, and the casting cools and solidifies under controlled conditions. Investment casting gives the best surface and dimensional accuracy, while graphite molds suit larger and simpler parts.
3. Grades and Properties
Cast titanium is supplied in commercially pure and alloy grades, with alloy grades such as Ti-6Al-4V providing the strength for structural and aerospace parts. The cast microstructure differs from wrought material, and the mechanical properties of castings are defined by the casting standard. Hot isostatic pressing is used to close internal porosity in critical castings.
4. Applications
Aerospace structural and engine castings.
Medical implant castings.
Marine and chemical equipment components.
Complex housings and brackets.
Artistic and architectural components.
5. Quality and Inspection
Castings are inspected by dimensional checks, surface inspection, radiography and mechanical testing per the standard. The heat number and the inspection records provide traceability, and HIP processing is documented where required. The certificate confirms the composition, the properties and the inspection results.
6. FAQ
Q1: Why cast titanium parts? Casting produces complex shapes economically, avoiding expensive machining of solid material.
Q2: What casting processes are used? Investment casting, graphite mold and rammed graphite processes.
Q3: Why is vacuum melting needed? Titanium reacts with oxygen and nitrogen at high temperature, so melting occurs in vacuum or inert atmosphere.
Q4: What is hot isostatic pressing? HIP applies heat and pressure to close internal porosity in critical castings.
Q5: How is quality verified? By dimensional checks, radiography, surface inspection and mechanical testing.
Q6: Where are titanium castings used? Aerospace, medical, marine and chemical components.
