Treatment of Zhuzhou 61 cemented carbide factory

I. Overview

Inconel 61 is a Ni-Cr solid solution nickel-based alloy. It has good high-temperature performance and oxidation resistance, and has many uses in aerospace and industry. It is one of the remarkable alloys.

varieties

materials of various varieties and covered electrode of various sizes.

heat treatment system

solution treatment: 1,15℃, 1-2 hours, water quenching or rapid air cooling. After 2% cold working, the alloy can be recrystallized at 885℃ and heated for 3 minutes.

chemical composition

chemical composition in table 1, %

physical and chemical properties

1. specific gravity: 8.5g/cm3

2. melting temperature: 13-1368℃

3. thermal conductivity (table 2)

thermal conductivity of the alloy in table 2

. Cooling at room temperature for 5 minutes) The test shows that the alloy has slight oxidation, little weight loss and no peeling, even exceeding Inconel 72 alloy with outstanding oxidation resistance.

mechanical properties

1. Mechanical properties at room temperature

Tensile properties

Table 6 Typical tensile properties at room temperature

Impact properties

Charpy ratio (V-notch) is 17.97 kg m.

2. Durability

Table 7 Durability

Process

Alloys are easy to be cold-worked and hot-worked. The process is similar to austenitic stainless steel. The initial forging temperature is 125℃, and the final forging temperature is 98℃ for heavy forging and 87℃ for light forging. The welding performance of the alloy is good. Inert gas metal welding and inert gas tungsten welding can be used. The alloy or alloy with similar composition is used as filler, and the filler metal should ensure that the weld has the same oxidation resistance as the matrix. If the alloy slowly passes through the temperature range of 54-76℃ during heating or cooling, carbide will easily precipitate, which is unfavorable to the performance of the alloy. In order to avoid carbide precipitation, it must be cooled quickly after solution treatment.

uses

used as aerospace structural materials, jet engine parts, thermocouple protection tubes, muffle furnaces, burner partitions, heat treatment baskets and fixtures, radiation furnace tubes, etc.