What is the Machining Performance of GH4049 (GH49) Nickel-based Alloy

Guotai Junan released a research report saying that under the background of carbon neutrality, the scarcity of coal mines is prominent, and the value of assets will continue to increase. The high point of capital expenditure in the coal industry appeared in 2012. Under the general direction of carbon neutrality, the overall investment in the industry has slowed down, and capital expenditure has gradually declined. From 2021 to now, the Energy Bureau of the National Development and Reform Commission has only newly approved 17.4 million tons of Nickel-based Alloy.

What is GH4049 (GH49) nickel base alloy?

GH4049 is a nickel-based superalloy, which is an age-hardening alloy. The corresponding grade is GH49. Its nickel content is about 70%. After the alloy is remelted by electroslag or vacuum arc, its processing plasticity can be improved. GH4049 superalloy has good hot and cold working properties. The alloy has good oxidation resistance below 1000 °C high temperature environment, high high temperature strength below 950 °C, small notch sensitivity, good oxidation resistance and fatigue strength. , poor single hot working plasticity

Main processing properties of GH4049 (GH49) nickel-based alloy

Compared with nickel-based alloys of the same kind, GH4049 superalloy has poor hot working plasticity. It is suitable for making gas turbine working blades with a working temperature of 850-950 °C. It is mainly used to make turbine blades for aviation, naval and industrial gas turbines. , high-temperature components such as guide vanes, turbine disks, high-pressure compressor disks and combustion chambers; also used in the manufacture of space vehicles, rocket engines, nuclear reactors, petrochemical equipment, and coal conversion and other energy conversion devices.

The nano-surface crystal layer was prepared on the surface of GH4049 nickel-based superalloy by the treatment process. The effects of different ultrasonic shot peening intensity and shot peening time on its yield strength, tensile strength and microhardness were analyzed. Residual stress distribution of the specimen after nanoization. The research results show that the increase of shot peening time has no direct relationship with the improvement of material strength, and with the increase of shot peening time, the strength of the material will decrease due to the damage of the material surface. After ultrasonic shot peening, the microhardness was significantly improved compared with that of the untreated specimen, and a compressive stress layer of about thickness was formed on the surface of the specimen, and the large compressive stress far exceeded the yield limit of the material.

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Since February, gold has enjoyed a smooth upward run on the back of surging US inflation and the brewing of war. While expectations of rate rises have also risen in tandem over this period, gold had been largely pre-priced and the underlying driver of tightening expectations had come from inflation continuing to rise to record highs. The risk aversion caused by the continued tension in the war also provided an important short-term support for gold. This will have a certain impact on the price of the Nickel-based Alloy and the market of the Nickel-based Alloy. 

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