阅读说明：本技术 一种压力容器用耐高温耐腐蚀镍基合金焊接材料 (High-temperature-resistant corrosion-resistant nickel-based alloy welding material for pressure container ) 是由 朱新军 于 2021-08-19 设计创作，主要内容包括：本发明涉及镍合金技术领域,尤其涉及一种压力容器用耐高温耐腐蚀镍基合金焊接材料。采用GH3536高温合金焊丝对NO8120合金材质进行焊接过程中,焊缝容易出现气孔和微裂纹,导致焊接不良,焊接接头的力学性能不佳。基于上述问题,本发明提供一种压力容器用耐高温耐腐蚀镍基合金焊接材料,其在GH3536合金焊丝成分的基础上进一步优化,使其在焊接NO8120合金材质的压力容器时,焊缝不容易出现气孔和微裂纹,大大提高了焊接接头的室温力学性能和高温力学性能。(The invention relates to the technical field of nickel alloy, in particular to a high-temperature-resistant corrosion-resistant nickel-based alloy welding material for a pressure container. In the process of welding the NO8120 alloy material by adopting the GH3536 high-temperature alloy welding wire, pores and microcracks are easy to appear in the welding seam, so that poor welding is caused, and the mechanical property of the welding joint is poor. Based on the problems, the invention provides the high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container, which is further optimized on the basis of the components of the GH3536 alloy welding wire, so that pores and microcracks are not easy to appear in a welding seam when the pressure container made of NO8120 alloy is welded, and the room-temperature mechanical property and the high-temperature mechanical property of a welding joint are greatly improved.)

1. The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container is characterized by comprising the following components in percentage by mass:

2. the high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container as claimed in claim 1, which comprises the following components in percentage by mass:

3. the high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container as claimed in claim 1, which is prepared by the following steps:

the preparation method comprises the following steps:

(1) alloy smelting:

according to the formula amount, the raw materials are put into a vacuum induction furnace according to the proportion for smelting, and the vacuum degree needs to reach 6.5 multiplied by 10^-2Pa above, and casting into electrode bar;

(2) electroslag remelting:

adopting electroslag remelting equipment, grinding the surface of the electrode rod in the step (1), inserting the electrode rod serving as an electrode into molten slag for remelting, cutting off power for cooling for 10-15min, removing ingots, and cooling to normal temperature to obtain alloy ingots;

(3) hot forging and cogging:

placing the alloy ingot in the step (2) into a heating furnace with the initial temperature less than or equal to 600 ℃ for heating, raising the temperature to 1160-1180 ℃, preserving the temperature for 50-60min, forging to form an alloy blank, and cooling to the normal temperature;

(4) hot rolling and annealing:

heating the alloy blank in the step (3) to 1140-1160 ℃, hot-rolling the alloy blank into a coiled wire material, and cooling the coiled wire material to the normal temperature;

(5) mechanical husking:

adopting mechanical husking equipment to perform mechanical husking treatment on the surface of the wire rod in the step (4) to remove surface oxide skin to obtain a bright wire rod;

(6) drawing and reducing diameter:

gradually drawing and reducing the bright disc round wire material in the step (5) by adopting the existing cold drawing process until the diameter of the wire material is 1.6-2.4mm, so as to ensure that the surface of the wire material is clean and smooth and has no burrs, pits, scratches, sharp bends, knots, oil stains, other impurities and the like;

(7) straightening, cutting or precision layer winding:

and (3) straightening and cutting the wire material in the step (6) into a straight strip with the length of 860-sand 1000mm by adopting straightening and cutting equipment, or winding the wire material layer in the step (6) on a welding material disc by adopting precision layer winding equipment.

4. The method for preparing the high-temperature-resistant and corrosion-resistant nickel-based alloy for the pressure vessel as claimed in claim 3, wherein the method comprises the following steps: during electroslag remelting, CaF is adopted as slag₂-Al₂O₃CaO slag system, CaF in slag system₂70-80% by weight of Al₂O₃The weight percentage of the CaO is 17-20%, and the weight percentage of the CaO is 4-6%.

5. The method for preparing the high-temperature-resistant and corrosion-resistant nickel-based alloy for the pressure vessel as claimed in claim 3, wherein the method comprises the following steps: the allowable deviation of the wire of the welding material after straightening and cutting is (+0.1mm, -0.1 mm), the allowable deviation of the wire of the welding material after precision layer winding is (+0.01mm, -0.04 mm), the loose diameter is 600-1000mm, and the warping distance is 0-15 mm.

Technical Field

The invention relates to the technical field of nickel alloy, in particular to a high-temperature-resistant corrosion-resistant nickel-based alloy welding material for a pressure container.

Background

The pressure vessel for smelting and purifying the polycrystalline silicon is mostly made of NO8120 alloy, and a GH3536 high-temperature alloy welding wire is generally used for welding the pressure vessel in the manufacturing process of the pressure vessel.

The joint of the cylinder body of the pressure container and the upper and lower flanges is the most stressed part, and researches show that after the NO8120 alloy material is welded by using GH3536 high-temperature alloy welding wires, a hydraulic pressure test is carried out on the pressure container, wherein the test conditions comprise hydraulic pressure leakage and test pressure P_TThe pressure is 0.4MPa when the pressure is 1.25p, and the leakage is not caused in 1h at the joint of the cylinder body and the upper and lower flanges at most.

Through careful research, the GH3536 high-temperature alloy welding wire is easy to generate air holes and microcracks in a welding seam in the process of welding a NO8120 alloy material, so that poor welding is caused, and the room-temperature mechanical property and the high-temperature mechanical property of a welding joint are poor.

Disclosure of Invention

Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: in the process of welding the NO8120 alloy material by adopting the GH3536 high-temperature alloy welding wire, pores and microcracks are easy to appear in the welding seam, so that poor welding is caused, and the mechanical property of the welding joint is poor.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a high-temperature-resistant corrosion-resistant nickel-based alloy welding material for a pressure container, which comprises the following components in percentage by mass:

specifically, the high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container is characterized by comprising the following components in percentage by mass:

specifically, the high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container is prepared by the following steps:

the preparation method comprises the following steps:

(1) alloy smelting:

according to the formula amount, the raw materials are put into a vacuum induction furnace according to the proportion for smelting, and the vacuum degree needs to reach 6.5 multiplied by 10^-2Pa above, and casting into electrode bar;

(2) electroslag remelting:

adopting electroslag remelting equipment, grinding the surface of the electrode rod in the step (1), inserting the electrode rod serving as an electrode into molten slag for remelting, cutting off power for cooling for 10-15min, removing ingots, and cooling to normal temperature to obtain alloy ingots;

(3) hot forging and cogging:

placing the alloy ingot in the step (2) into a heating furnace with the initial temperature less than or equal to 600 ℃ for heating, raising the temperature to 1160-1180 ℃, preserving the temperature for 50-60min, forging to form an alloy blank, and cooling to the normal temperature;

(4) hot rolling and annealing:

heating the alloy blank in the step (3) to 1140-1160 ℃, hot-rolling the alloy blank into a coiled wire material, and cooling the coiled wire material to the normal temperature;

(5) mechanical husking:

adopting mechanical husking equipment to perform mechanical husking treatment on the surface of the wire rod in the step (4) to remove surface oxide skin to obtain a bright wire rod;

(6) drawing and reducing diameter:

gradually drawing and reducing the bright disc round wire material in the step (5) by adopting the existing cold drawing process until the diameter of the wire material is 1.6-2.4mm, so as to ensure that the surface of the wire material is clean and smooth and has no burrs, pits, scratches, sharp bends, knots, oil stains, other impurities and the like;

(7) straightening, cutting or precision layer winding:

and (3) straightening and cutting the wire material in the step (6) into a straight strip with the length of 860-sand 1000mm by adopting straightening and cutting equipment, or winding the wire material layer in the step (6) on a welding material disc by adopting precision layer winding equipment.

Specifically, CaF is adopted as slag in electroslag remelting₂-Al₂O₃CaO slag system, CaF in slag system₂70-80% by weight of Al₂O₃The weight percentage of the CaO is 17-20%, and the weight percentage of the CaO is 4-6%.

Specifically, the allowable deviation of the wire of the welding material after the straightening cutting is (+0.1mm, -0.1 mm), the allowable deviation of the wire of the welding material after the precision layer winding is (+0.01mm, -0.04 mm), the relaxation diameter is 600-1000mm, and the warping distance is 0-15 mm.

The invention has the beneficial effects that:

the welding performance of the nickel alloy welding wire is effectively improved by further optimizing the components of the GH3536 alloy welding wire, so that when the pressure vessel made of the NO8120 alloy material is welded, air holes and microcracks are not easy to appear in a welding seam, the pressure resistance duration of the pressure vessel in a hydraulic test is greatly prolonged, when the hydraulic test pressure is 0.4MPa, the pressure resistance duration of the pressure vessel made of the NO8120 alloy material after welding can reach 2 hours, and a better technical effect is achieved.

Detailed Description

The present invention will now be described in further detail with reference to examples.

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container in the following embodiment of the invention is prepared by the following steps:

the preparation method comprises the following steps:

(1) alloy smelting:

according to the formula amount, the raw materials are put into a vacuum induction furnace according to the proportion for smelting, and the vacuum degree needs to reach 6.5 multiplied by 10^-2Pa above, and casting into electrode bar;

(2) electroslag remelting:

adopting electroslag remelting equipment, grinding the surface of the electrode rod in the step (1), inserting the electrode rod serving as an electrode into molten slag for remelting, cutting off power for cooling for 10-15min, removing ingots, cooling to normal temperature to obtain alloy ingots, and during electroslag remelting, adopting CaF (calcium fluoride) as the molten slag₂-Al₂O₃CaO slag system, CaF in slag system₂70-80% by weight of Al₂O₃The weight percentage of the CaO is 17-20%, and the weight percentage of the CaO is 4-6%;

(3) hot forging and cogging:

placing the alloy ingot in the step (2) into a heating furnace with the initial temperature less than or equal to 600 ℃ for heating, raising the temperature to 1160-1180 ℃, preserving the temperature for 50-60min, forging to form an alloy blank, and cooling to the normal temperature;

(4) hot rolling and annealing:

heating the alloy blank in the step (3) to 1140-1160 ℃, hot-rolling the alloy blank into a coiled wire material, and cooling the coiled wire material to the normal temperature;

(5) mechanical husking:

adopting mechanical husking equipment to perform mechanical husking treatment on the surface of the wire rod in the step (4) to remove surface oxide skin to obtain a bright wire rod;

(6) drawing and reducing diameter:

gradually drawing and reducing the bright disc round wire material in the step (5) by adopting the existing cold drawing process until the diameter of the wire material is 1.6-2.4mm, so as to ensure that the surface of the wire material is clean and smooth and has no burrs, pits, scratches, sharp bends, knots, oil stains, other impurities and the like;

(7) straightening, cutting or precision layer winding:

and (3) straightening and cutting the wire material in the step (6) into a straight strip with the length of 860-plus-1000 mm by adopting straightening and cutting equipment, or winding the wire material layer in the step (6) on a welding material disc by adopting precision layer winding equipment, wherein the allowable deviation of the wire diameter of the welding material after straightening and cutting is (+0.1mm, -0.1 mm), the allowable deviation of the wire diameter of the welding material after precision layer winding is (+0.01mm, -0.04 mm), the loose diameter is 600-plus-1000 mm, and the warping distance is 0-15 mm.

Example 1

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container comprises the following components in percentage by mass:

example 2

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container comprises the following components in percentage by mass:

example 3

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container is characterized by comprising the following components in percentage by mass:

example 4

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container comprises the following components in percentage by mass:

example 5

The high-temperature-resistant corrosion-resistant nickel-based alloy welding material for the pressure container comprises the following components in percentage by mass:

comparative example 1 is the same as example 1 except that the mass% of Si in comparative example 1 is 1%.

Comparative example 2 is the same as example 1 except that the content of Si in comparative example 2 is 0.1% by mass.

Comparative example 3 the same as example 1 except that the Mn content in comparative example 3 was 1% by mass.

Comparative example 4 is the same as example 1 except that the mass percentage of Mn in comparative example 4 is 0.1%.

Comparative example 5 is the same as example 1 except that the Cu content of comparative example 5 is 0.5% by mass.

And (3) performance testing:

the nickel alloy welding wires obtained in examples 1-5 and comparative examples 1-5 were used to perform argon tungsten-arc welding on NO8120 alloy materials, and room-temperature mechanical properties and high-temperature mechanical properties of the welded joints were respectively tested at room temperature and 350 ℃ according to GB/T2651-2008 "tensile test method for welded joints", and the test results are shown in Table 1.

TABLE 1

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.