Impro Blogs on Investment Casting


Material Selection for Gas Turbine Nozzle Assemblies
September 19th, 2023
Not many alloys can survive in the environment downstream of the combustion chamber in a gas turbine engine. It’s too hot, forces are high, the gases are extremely corrosive and they’re flowing quickly. Together, these factors make material selection one
Manufacturing Techniques for Gas Turbine Nozzle Assemblies
September 12th, 2023
In a gas turbine engine the nozzle assembly comes just after the combustion chamber. It directs fast moving gasses onto the turbine blades that generate the rotary motion needed for power generation. It’s a complex piece of engineering, produced in
17-4 Stainless Steel Investment Casting and its Applications
September 5th, 2023
Stainless steel is produced in a large number of grades that have austenitic, ferritic or martensitic structures. 17-4 is a martensitic grade that can be precipitation hardened, (leading to the 17-4 PH designation). It’s often investment cast and is a
Thin-Walled Investment Casting and its Applications
August 29th, 2023
Wall thickness refers to the distance between opposite sides or surfaces of a solid metal cast region. In a part like a cover the wall thickness is the distance between inner and outer surfaces. Thin walls are difficult to cast,
Stainless Steel Investment Casting and Its Aerospace Applications
August 21st, 2023
Stainless steel is preferred for many aircraft engine, structural, fuel and hydraulic system applications. Providing a combination of strength and corrosion-resistance, it supports weight reduction goals and facilitates factors of safety of 1.5. Part mass is minimized by investment casting.
Understanding the Design and Engineering of Gas Turbine Nozzle Assemblies
August 18th, 2023
Gas turbine nozzle components are some of the most highly engineered parts manufactured anywhere. They need to survive high temperatures, corrosive atmospheres, vibration and centrifugal forces, and the challenges are growing as gas turbine manufacturers push for higher temperatures and
Introduction to Investment Casting Accuracy Grades
July 13th, 2023
One of the reasons for having parts made by investment casting is that the process is capable of maintaining tight tolerances. This minimizes secondary machining and enables reproduction of fine. What’s left unasked though is, what tolerances can investment casting
Inconel® Investment Casting
June 6th, 2023
Engineers turn to nickel-based superalloys when stainless steel can’t provide enough corrosion resistance or high temperature strength. The downside of alloys like Inconel® though, is that they are hard to machine. This makes investment casting the most practical manufacturing route.
An Introduction to Making Gas Turbine Nozzle Assemblies
June 1st, 2023
The combustion gases expelled from a gas turbine will quickly erode and can even melt most steels. For internal components to survive in such an environment, they are investment cast in nickel-based superalloys, precision machined and carefully inspected. Here’s an
Quality Control in Investment Casting
May 19th, 2023
Investment casting is ideal for producing parts that will be highly loaded, subjected to high temperatures and pressures, or require precise geometry that minimizes secondary operations. This is especially true when the alloys used are expensive and hard to machine.
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