CN104959507A - Tool and method for high temperature alloy annular element forging - Google Patents

Abstract

The invention discloses a tooling and a method for forging high-temperature alloy rings, which belong to the field of metallurgical forging. The tooling includes: a base on which a plurality of pairs of mounting positions with different spacings are arranged; at least two support plates respectively installed on the base of the base At different installation positions, the distance between the two support plates can be adjusted by changing the installation position; the mandrel is movably arranged on the two support plates. The invention also provides a high temperature alloy ring forging method using the tooling. The tooling with adjustable support plate spacing is used as the forging tooling, which changes the current forging method of high-temperature alloy rings, does not need to replace the horse frame many times, simplifies the forging steps of forging high-temperature alloy rings, and saves the replacement of horses required for traditional high-temperature alloy ring forging It is only necessary to adjust the distance between the supporting plates of the matching tooling, and it is not necessary to prepare multiple sets of horse frames of different specifications, thus improving the production efficiency of high-temperature alloy rings and reducing the labor intensity of workers, and eliminating the need for multiple sets of horse frames. The production cost of the frame.

Description

Tooling and method for forging superalloy ring parts

technical field

The invention belongs to the field of metallurgical forging, and in particular relates to a tooling and method for matching high-temperature alloy ring parts forging.

Background technique

High-temperature alloy rings are mainly used in aerospace fields such as aero-engine casings, as well as high-temperature and corrosion-resistant working conditions such as civil steam turbines and petrochemicals. With the development of my country's industrialization construction, other application fields of superalloy rings are gradually expanding, and the demand is increasing. Such as energy power, petrochemical and many other industrial sectors.

Due to the high temperature of the working environment of superalloy ring parts, and generally work in the atmospheric atmosphere or corrosive gas environment, the superalloy ring parts not only need to have high mechanical strength, but also need to have excellent oxidation and corrosion resistance. However, the forging temperature range of high-temperature alloy ring parts is narrow, and the shape and process of forging parts are relatively complicated. It is very easy to fail in the forging of ring parts due to improper operation during the production process. This brings many difficulties to the production of superalloy ring parts.

The traditional high-temperature alloy ring forging is to forge the billet on the horse frame of different specifications, that is, to first expand the hole on the horse frame with the smaller mandrel size and the shorter distance between the horse frames, and replace the different parts with the change of the blank size. Spec horse frame and mandrel. It takes a long time to replace the horse frame like this, and it is necessary to prepare many sets of horse frames of different specifications, so the production efficiency is low and the labor intensity of the workers is high, and multiple sets of horse frames also increase the production cost.

Contents of the invention

Based on the above-mentioned problems in the prior art, the present invention provides a tooling and method for forging high-temperature alloy ring parts without changing the horse frame and simplifying the forging process.

In order to solve the above technical problems, the present invention provides a tooling for forging high-temperature alloy rings, the tooling includes:

The base is provided with multiple pairs of mounting positions with different spacings;

At least two support plates are respectively installed on different installation positions of the base, and the distance between the two support plates can be adjusted by changing the installation positions;

The mandrel is movably arranged on the two support plates.

The present invention also provides a method for forging a high-temperature alloy ring, using the tooling of the present invention, comprising the following steps:

The first step is to put the high-temperature alloy billet into the heating furnace and heat it evenly;

In the second step, the heated superalloy blank is placed on the mandrel of the tooling to ream holes to form a superalloy ring, and the hydraulic press is started to forge the high temperature alloy ring, and the tooling is rotated during the forging process. mandrel and said superalloy ring, until completion of the reaming step;

In the third step, when the height and inner diameter of the superalloy ring increase and the thickness becomes thinner, replace the tooling with a mandrel of a new specification, and adjust the distance between the support plates of the tooling to continue expanding the superalloy ring. hole, and repeat this step until the superalloy ring reaches the designed size, that is, the forging of the superalloy ring is completed.

The beneficial effects of the present invention are: by adopting the tooling with adjustable support plate spacing as the matching tooling for forging, the current forging method of superalloy rings is changed, the horse frame does not need to be replaced many times, the forging steps of forging superalloy rings are simplified, and the forging process is saved. It eliminates the time required to replace the horse frame for the traditional superalloy ring forging, and only needs to adjust the distance between the supporting plates of the matching tooling, and does not need to prepare multiple sets of horse frames of different specifications, thus improving the production efficiency of high temperature alloy ring parts And reduce the labor intensity of workers, and also avoid the production cost of multiple sets of horse frames. The frock provided by the invention has the advantages of simple structure, reasonable design and convenient maintenance.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative work.

Fig. 1 is a structural schematic diagram of a tooling for forging a superalloy ring provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the base of the high temperature alloy ring forging tool provided by the embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a support plate of a tool for forging a superalloy ring provided by an embodiment of the present invention.

Detailed ways

The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Fig. 1 shows a tool for forging a high-temperature alloy ring according to an embodiment of the present invention, which can be used as a supporting tool in forging a high-temperature alloy ring. The base structure is as described in Figure 2); at least two support plates are respectively installed on different installation positions of the base, and the distance between the two support plates can be adjusted by changing the installation positions; the mandrel is movably arranged on the two support plates.

In the above-mentioned tooling, the base structure is as shown in Figure 2. It is composed of a horizontal plate body 11, a vertical plate 12 at the bottom of the horizontal plate body 11, and a vertical plate 13 at the rear end on the horizontal plate body 11. There are multiple pairs of different spacings on the base. The installation positions are bolt holes, and the two support plates are respectively installed on different installation positions of the base through the cooperation of the bolt holes provided thereon and the bolts. The bolt holes used as mounting positions are at the riser.

In the above-mentioned tooling, the structure of the support plate is shown in Figure 3. There is an arc-shaped groove on the edge of the support plate for placing the mandrel, and the mandrel is movably arranged on the support plate through the arc-shaped groove.

In the above-mentioned tooling, one end of the mandrel is provided with a handle for rotating the mandrel; during the forging process of the ring, the mandrel relies on the two ends to support the pressure formed by the forging of the ring, and the mandrel will also bear the force of the ring on the mandrel during the forging process. wear, and in order to reduce labor intensity and forging efficiency, the diameter of the mandrel should not be too large. The mandrel is made of tool steel H13 with excellent strength and wear resistance. The structure of the mandrel is basically the same as that of the existing mandrel.

Specifically, the above-mentioned tooling is composed of a base, two support plates, mandrels and bolts. The base is provided with multiple pairs of bolt holes with different spacings. Each bolt hole is matched with the bolt size. There are through holes matching the bolts on each support plate. By adjusting the bolt holes installed on the two support plates, the distance between the two support plates can be adjusted conveniently; Arc-shaped grooves, mandrels of various specifications have handles for rotating the mandrel at one end.

The embodiment of the present invention also provides a method for forging a high-temperature alloy ring, using the above-mentioned tool as a matching tool for forging, including the following steps:

The first step is to put the high-temperature alloy blank into the heating furnace and heat it evenly; preferably, the heating furnace can be a standard or non-standard resistance furnace or gas furnace, and the heating temperature and time are determined according to the material and size of the ring to ensure that the heating area of the blank is even. Yes; generally according to the high-temperature alloy blank, the heating temperature can be: 1160°C; the heating time is: 2 hours.

In the second step, the heated superalloy blank is placed on the mandrel of the tooling to ream holes to form a superalloy ring, and the hydraulic press is started to forge the high temperature alloy ring, and the tooling is rotated during the forging process. mandrel and said superalloy ring, until completion of the reaming step;

In the third step, when the height and inner diameter of the superalloy ring increase and the thickness becomes thinner, replace the tooling with a mandrel of a new specification, and adjust the distance between the support plates of the tooling to continue expanding the superalloy ring. hole, and repeat this step until the superalloy ring reaches the designed size, that is, the forging of the superalloy ring is completed. In practice, according to the specific process, if necessary, it is necessary to replace the mandrel several times, adjust the distance between the two support plates, and ream holes on the tooling until the blank is forged to the required size.

The tooling and method of the present invention will be further described below in conjunction with specific embodiments.

Example 1

This embodiment provides a method for forging a high-temperature alloy ring. The tooling of the present invention is used as a supporting tool. The blank for forging a high-temperature alloy ring is a Ni-33Cr-5W-3Mo superalloy, and the outer diameter of the final forged ring is 450mm, inner diameter 400mm, height 150mm: Use the following steps:

(1) At room temperature, put the Ni-33Cr-5W-3Mo superalloy billet with an outer diameter of 450mm, an inner diameter of 250mm, and a height of 55mm into a resistance furnace and heat it to 1100°C for 2 hours;

(2) Place the heated blank on a mandrel with a diameter of 180mm to ream, and during the process of reaming, simultaneously rotate the mandrel and the forging ring;

(3) When the height and inner diameter of the ring increase and the thickness decreases, replace the mandrel with a diameter of 250mm and adjust the distance between the support plates; after replacing the mandrel and adjusting the distance between the support plates, continue to ream the hole on the tooling; finally replace the diameter with a diameter of 380mm The mandrel reams the billet; during the forging process, if the billet temperature is lower than 950°C, the billet is returned to the furnace and kept at 1100°C for 2 hours before forging until the ring is forged to meet the outer diameter of 450mm and inner diameter of 400mm. The height is 150mm, that is, the forging of the superalloy ring is completed.

Example 2

This embodiment provides a method for forging a high-temperature alloy ring. The tooling of the present invention is used as a supporting tool. The blank for forging a high-temperature alloy ring is a Ni-18Cr-6W-4Mo superalloy, and the outer diameter of the final forged ring is 200mm, with an inner diameter of 160mm and a height of 80mm, use the following steps:

(1) Put the Ni-18Cr-6W-4Mo superalloy billet with an outer diameter of 200 mm, an inner diameter of 80 mm, and a ring height of 40 mm at room temperature into a resistance furnace to heat to 1100 ° C and keep it warm for 2 hours;

(2) Place the heated blank on a mandrel with a diameter of 50mm to ream; during the process of reaming, rotate the mandrel and the forging ring at the same time;

(3) When the height and inner diameter of the ring are increased and the thickness is reduced, the mandrels with diameters of 80mm, 120mm, and 150mm are replaced successively to expand the hole; during the forging process, if the temperature of the blank is lower than 950 ° C, the blank is returned to the furnace and placed in the forging process. Heat at 1100°C for 2 hours and then forge until the ring is forged to meet the outer diameter of 200mm, inner diameter of 160mm, and height of 80mm, that is, the forging of the superalloy ring is completed.

The superalloy ring produced by the forging method of the invention has excellent mechanical properties and stable quality. The invention has the advantages of simple steps, low cost and high production efficiency.

Example 3

This embodiment provides a method for forging a high-temperature alloy ring, which is used to prepare a high-temperature alloy ring for a steam turbine. Using the tooling of the present invention as the forging tool includes the following steps:

Put the high-temperature alloy blank into a resistance heating furnace for heating: the heating furnace is a standard box-type resistance furnace, the heating temperature is 1160°C, and the heating and holding time is 2 hours; the blank is placed on the furnace floor with holes to ensure that the heating area of the blank is uniform;

Put the heated high-temperature alloy billet on the mandrel of the tooling to expand the hole, that is, penetrate the mandrel of appropriate size into the heated superalloy billet, start the hydraulic press, and forge the superalloy billet into a superalloy ring; During the process, rotate the mandrel and the forged ring at the same time; when the temperature drops to 950°C, return the billet to the furnace for 1 hour, and then continue forging;

When the height of the high-temperature alloy ring is close to the width of the support plate of the tooling, replace the mandrel and adjust the width of the support plate (that is, the distance between the support plates), and continue to expand the hole until the high-temperature alloy ring is successfully forged.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person familiar with the technical field can easily conceive of changes or changes within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. A tool for forging a superalloy ring, characterized in that the tool comprises: The base is provided with multiple pairs of mounting positions with different spacings; At least two support plates are respectively installed on different installation positions of the base, and the distance between the two support plates can be adjusted by changing the installation positions; The mandrel is movably arranged on the two support plates. 2. The tooling for forging high-temperature alloy rings according to claim 1, characterized in that, an arc-shaped groove for placing the mandrel is arranged on the edge of the support plate, and the mandrel passes through the arc The shaped groove is movably arranged on the support plate. 3. The tooling for forging superalloy rings according to claim 1 or 2, characterized in that, the multiple pairs of installation positions with different spacings on the base are bolt holes. 4. The high-temperature alloy ring forging tool according to claim 1 or 2, characterized in that, the two support plates are respectively installed on different installation positions of the base through the bolt holes provided thereon and the bolts. . 5. The high-temperature alloy ring forging tooling according to claim 1 or 2, wherein a handle for rotating the mandrel is provided at one end of the mandrel; The mandrel is prepared from tool steel H13. 6. A method for forging a high-temperature alloy ring, characterized in that the tooling described in any one of claims 1 to 5 is used as a matching tooling for forging, comprising the following steps: The first step is to put the high-temperature alloy billet into the heating furnace and heat it evenly; In the second step, the heated superalloy blank is placed on the mandrel of the tooling to ream holes to form a superalloy ring, and the hydraulic press is started to forge the high temperature alloy ring, and the tooling is rotated during the forging process. For the mandrel and the high-temperature alloy ring, when the temperature drops to 950°C, return the billet to the furnace and keep it warm for 1 hour, and then continue forging until the hole-enlarging step is completed; In the third step, when the height and inner diameter of the high-temperature alloy ring increase and the thickness becomes thinner to the size that the mandrel cannot continue to be processed effectively, replace the tooling with a new specification mandrel, and adjust the distance between the support plates of the tooling to continue Reaming the high-temperature alloy ring, repeating this step until the high-temperature alloy ring reaches the designed size, that is, the forging of the high-temperature alloy ring is completed. 7. The method for forging a high-temperature alloy ring according to claim 6, wherein the heating furnace is a resistance furnace or a gas furnace. 8. The high-temperature alloy ring forging method according to claim 6 or 7, characterized in that the heating temperature is: 1160°C; Heating time: 2 hours.