CN116603962A - Forging method for small-diameter wide-specification titanium plate blank of consumable furnace - Google Patents

Abstract

A method for forging a titanium slab with a small diameter and a wide specification in a self-consumable furnace belongs to the technical field of titanium slab production. The present invention is characterized in that the method comprises the following steps: 1. Thickening: the titanium ingot is erected under the forging press using a mobile manipulator, and the forging press is forged downward to reduce the length of the titanium ingot, Diameter expansion, control deformation: 2. Horizontal elongation: Place the thickened titanium ingot in parallel between two anvil surfaces, roll the thickened titanium ingot, and control a single press 3. Longitudinal elongation: use the manipulator to hold the titanium ingot and rotate it between the two anvil surfaces, and use the forging press The jaws are elongated and forged longitudinally, and forged alternately along the thickness and width directions of the titanium ingot. The present invention can realize the forging of a titanium slab of more than 1500 mm when the ratio of the height (H) to the diameter (D) of the upsetting part of the ingot is greater than or equal to 3, that is, H/D≧3.

Description

A method for forging titanium slabs with small diameter and wide specifications in consumable furnace

technical field

The invention belongs to the technical field of titanium slab production, and in particular relates to a method for forging a titanium slab with a small diameter and a wide specification in a consumable furnace.

Background technique

Titanium has outstanding advantages such as light specific gravity, high specific strength, and corrosion resistance. It is often used in the chemical industry. Argon arc welding is required in the production process of chemical equipment. The life of the weld seam directly determines the anti-corrosion life of the equipment. At present, such equipment All plates are produced by coil rolling, so increasing the width of coil rolled plates has become the focus of various institutions.

The width of the coil is directly determined by the width of the slab. The original production of titanium slabs mainly uses fast forging machines. Using forging presses and auxiliary equipment, first upsetting, and then using the upper and lower anvils to exert pressure on the blanks to cause plastic deformation, so that The shape and size of the consumable furnace ingot change, but in the actual operation process, it is greatly affected by the diameter and height of the 10T consumable furnace ingot, and it is impossible to forge a slab of more than 1500mm.

In "Forging" and "Titanium Ingot and Forging" and other books, the ingot upsetting height-to-diameter ratio and the length and width of the ingot are described in detail. In order to prevent longitudinal bending during upsetting, the height of the upsetting part of the ingot The ratio of (H) to diameter (D) is H/D≤2.5-3, otherwise it is difficult to achieve upsetting, and it is easy to bend and wrinkle during the upsetting process, and the target size cannot be reached; then from the circle to the slab According to the empirical formula (H<0.5B) and (H≧0.5B) of the forging process, the diameter D after upsetting cannot reach a certain value, and the slab width cannot achieve the final widening target by adjusting the forging feed rate.

Contents of the invention

The present invention aims at the above problems, makes up for the deficiencies in the prior art, and provides a small-diameter and wide-spec titanium slab forging method in a consumable furnace; the present invention can be used as the height (H) and diameter (D) The ratio is greater than or equal to 3, that is, when H/D≧3, titanium slabs with a thickness of more than 1500 mm can be forged.

In order to achieve the above object, the present invention adopts the following technical solutions.

The invention provides a method for forging a titanium slab with a small diameter and a wide specification in a consumable furnace, which is characterized in that the method comprises the following steps:

1. Thick pier: the titanium ingot is erected under the forging press using a mobile manipulator, and the forging press is forged downward, so that the length of the titanium ingot is reduced, the diameter is enlarged, and the amount of deformation is controlled:

2. Horizontal elongation: place the thickened titanium ingot in parallel between two anvil surfaces, roll the thickened titanium ingot, control the amount of single pressing, and roll with the full anvil. fully extending the titanium ingot laterally;

3. Longitudinal elongation: use the manipulator to hold the titanium ingot and rotate it between the two anvils, use the jaws of the forging press to elongate the forging, alternately along the thickness of the titanium ingot and the thickness of the titanium ingot. Forging is carried out in the width direction until a titanium slab of the required thickness and width is obtained.

Further, in the step 1, the amount of deformation is controlled between 25%-30%.

Further, the single pressing amount in the step 2 is controlled between 80mm-100mm.

Further, the single maximum feeding amount of the elongation forging in the step 3 is less than 450mm.

Beneficial effect of the present invention.

Because the present invention breaks the original forging method, the traditional way of upsetting with a large amount of deformation and then elongating in the longitudinal direction is changed to the method of upsetting with a small amount of deformation first, then elongating in the horizontal direction and elongating in the longitudinal direction, and realizes the upsetting of the ingot. The ratio of the height (H) to the diameter (D) of the thick part is greater than or equal to 3, that is, when H/D≧3, titanium slabs with a thickness of more than 1500 mm can be forged. Using free forging to produce titanium slabs can get thicker plates. The whole process is practical and the quality is easy to control. The edge of the produced titanium slab has been fully forged and deformed during the forging process, has the same structure as the middle part, and can reach the same flaw detection level as the middle part. The edge and center of the forged titanium slab have good structure. And the edge has enough deformation, the edge is close to a right angle, and the radius of the arc is ≤ 8mm. It is easy to remove the defects of the edge by machining. The forged titanium slab has a better edge shape and can be directly produced. use,

Description of drawings

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

Fig. 1 is a schematic diagram of the state before and after step 1 of the present invention.

Fig. 2 is a schematic diagram of the states before and after step 2 of the present invention.

Fig. 3 is a schematic diagram of the states before and after step 3 of the present invention.

Marks in the figure: 1 is the titanium ingot, 2 is the forging press, 3 is the anvil surface.

Detailed ways

As shown in the accompanying drawings, this embodiment provides a method for forging a titanium slab with a small diameter and a wide specification in a self-consumable furnace, which is operated by using the following equipment and tools:

A set of hydraulic fast forging machine equipment with a headroom of the forging machine greater than the length of the titanium ingot 1 and more than 35MN; a mobile manipulator whose weight is greater than the ingot; the opening angle of the jaws of the mobile manipulator must be greater than the length of the titanium ingot 1 after upsetting Jaw; two upper and lower anvil surfaces 3 of equal width (anvil surface 3 width B≧titanium slab width).

The forging method comprises the steps:

1. Thick pier: The titanium ingot 1 is placed upright under the forging press 2 by using the mobile manipulator, and the forging machine is forged downward, so that the length of the titanium ingot 1 is reduced and the diameter is enlarged. According to the provisions of the National Titanium Processing Manual, the deformation amount Control between 25%-30%, otherwise it may cause thermal cracking of titanium metal;

2. Horizontal elongation: place the thickened titanium ingot 1 in parallel between two anvil surfaces 3, roll the thickened titanium ingot 1, and control the single pressing amount between 80mm-100mm, Improving forging efficiency and forging within this value range can ensure that the yield of finished products will not decrease, and at the same time, hot cracks will not appear on the surface of the finished titanium slab, and full anvil rolling will make the titanium ingot 1 fully extend laterally to break the internal structure.

3. Longitudinal elongation: use the manipulator to hold the ingot and rotate it between the two anvil surfaces 3, and then use the 2 jaws of the forging press to perform elongation and forging. The maximum single-feeding amount is less than 450mm, which also improves the forging efficiency and in Forging within this value range can ensure that the finished product rate will not decrease, and at the same time, there will be no thermal cracks on the surface of the finished titanium slab, and the forging will be alternately carried out along the thickness and width directions of the titanium ingot 1 until the titanium slab with the required thickness and width is obtained. .

It can be understood that the above specific descriptions of the present invention are only used to illustrate the present invention and are not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or Equivalent replacements to achieve the same technical effect; as long as they meet the needs of use, they are all within the protection scope of the present invention.

Claims (4)

1. a kind of consumable furnace small diameter wide specification titanium slab forging method is characterized in that, described method comprises the steps: 1) Thick pier: the titanium ingot (1) is erected under the forging press (2) using a mobile manipulator, and the forging press (2) is forged downward, so that the length of the titanium ingot (1) is reduced, and the diameter Dilate, to control the amount of deformation: 2) Horizontal elongation: Place the thickened titanium ingot (1) between two anvil surfaces (3) in parallel, roll the thickened titanium ingot (1), and control the single Pressing amount, full anvil rolling, so that the titanium ingot (1) is fully extended laterally; 3) Longitudinal elongation: use the manipulator to hold the titanium ingot (1) and rotate it between the two anvil surfaces (3), and use the jaws of the forging press (2) to perform longitudinal elongation forging. Alternately performing forging along the thickness and width directions of the titanium ingot (1) until a titanium slab of required thickness and width is obtained. 2. A method for forging a titanium slab with a small diameter and a wide specification in a consumable furnace according to claim 1, characterized in that, in the step 1, the amount of deformation is controlled between 25% and 30%. 3 . The method for forging a titanium slab with a small diameter and a wide specification in a consumable furnace according to claim 1 , wherein the single pressing amount in the step 2 is controlled between 80 mm and 100 mm. 4 . 4. A method for forging a titanium slab with a small diameter and a wide specification in a self-consumable furnace according to claim 1, characterized in that, the single maximum feeding amount of the elongated forging in the step 3 is less than 450 mm.