CN104632409A - Low-pressure inner air cylinder of gas turbine - Google Patents

Abstract

The invention discloses a low-pressure inner air cylinder of a gas turbine. The low-pressure inner air cylinder comprises a metal main body, wherein the metal main body is made from an alloy material, and the alloy material comprises the following components in percentage by weight: 5.24% of Ni, 6.72% of Mo, 1.39% of Ni, 2.11% of W, 3.47% of Zr, and the balance being Mg and inevitable impurities; the alloy material is prepared by the following steps: (1) preheating Mg, a Mg-Ni alloy, a Mg-Mo alloy, a Mg-Ni alloy, a Mg-W alloy and a Mg-Zr alloy for 57min at 217 DEG C; (2) introducing a protective atmosphere into a smelting furnace, putting the preheated Mg, and heating to melt the Mg; (3) then putting the preheated Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy, and heating up for fully melting the alloys to obtain a melt; and (4) standing the melt, cooling to 532 DEG C, and carrying out pressure casting to obtain the alloy material. The low-pressure inner air cylinder of the gas turbine has the excellent abrasion resistance, high temperature resistance, corrosion resistance, weather resistance and strength.

Description

Gas turbine low pressure inner casing

Technical field

The present invention relates to gas turbine low pressure inner casing.

Background technique

Gas turbine is the power generating equipment of extensive use, the Environmental Conditions more complicated of gas turbine, all higher to the requirement of the abrasion-resistant of all parts of gas turbine, high temperature resistant, corrosion-resistant, weather resistance and intensity.

Summary of the invention

The object of the present invention is to provide a kind of gas turbine low pressure inner casing, it has excellent abrasion-resistant, high temperature resistant, corrosion-resistant, weather resistance and intensity.

For achieving the above object, technological scheme of the present invention is a kind of gas turbine low pressure inner casing of design, and comprise metal master, described metal master is made up of alloy material, and by weight percentage, the composition of this alloy material is:

Ni：5.24％，

Mo：6.72％，

Ni：1.39％，

W：2.11％，

Zr：3.47％，

Surplus is Mg and inevitable impurity;

Described alloy material is prepared as follows:

1) at 217 DEG C, by Mg, Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy preheating 57min;

2) pass into protective atmosphere in smelting furnace, drop into the Mg after preheating, and heating makes Mg melt;

3) Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy after dropping into preheating, heat up and fully melt;

4) be cooled to 532 DEG C by standing for melt body, die casting obtains alloy material.

Advantage of the present invention and beneficial effect are: provide a kind of gas turbine low pressure inner casing, and it has excellent abrasion-resistant, high temperature resistant, corrosion-resistant, weather resistance and intensity.

Embodiment

Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples only for technological scheme of the present invention is clearly described, and can not limit the scope of the invention with this.

The technological scheme that the present invention specifically implements is:

A kind of gas turbine low pressure inner casing, comprise metal master, described metal master is made up of alloy material, and by weight percentage, the composition of this alloy material is:

Ni：5.24％，

Mo：6.72％，

Ni：1.39％，

W：2.11％，

Zr：3.47％，

Surplus is Mg and inevitable impurity;

Described alloy material is prepared as follows:

1) at 217 DEG C, by Mg, Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy preheating 57min;

2) pass into protective atmosphere in smelting furnace, drop into the Mg after preheating, and heating makes Mg melt;

3) Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy after dropping into preheating, heat up and fully melt;

4) be cooled to 532 DEG C by standing for melt body, die casting obtains alloy material.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (1)

1. gas turbine low pressure inner casing, is characterized in that, comprises metal master, and described metal master is made up of alloy material, and by weight percentage, the composition of this alloy material is:

Ni：5.24％，

Mo：6.72％，

Ni：1.39％，

W：2.11％，

Zr：3.47％，

Surplus is Mg and inevitable impurity;

Described alloy material is prepared as follows:

1) at 217 DEG C, by Mg, Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy preheating 57min;

2) pass into protective atmosphere in smelting furnace, drop into the Mg after preheating, and heating makes Mg melt;

3) Mg-Ni alloy, Mg-Mo alloy, Mg-Ni alloy, Mg-W alloy and Mg-Zr alloy after dropping into preheating, heat up and fully melt;

4) be cooled to 532 DEG C by standing for melt body, die casting obtains alloy material.