Welding and heat treatment method for aging-strengthened nickel-based high-temperature alloy and heat-resistant steel
A technology of nickel-based superalloys and heat treatment methods, applied in heat treatment furnaces, heat treatment equipment, welding equipment, etc., can solve problems such as difficult-to-weld joints, high crystallization cracks, and strain aging crack sensitivity, and achieve performance without being affected and reduced The tendency of liquefaction cracks and the effect of avoiding excessive temperature
Active Publication Date: 2020-02-14
DONGFANG TURBINE CO LTD
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Age-strengthened nickel-based superalloys mainly use γ' rich in Al and Ti and specific carbides as strengthening phases. The welded joints have high susceptibility to crystallization cracks and strain aging cracks, especially in the heat-affected zone. γ' eutectic with low melting point forms microcracks under welding thermal stress, and the heat-affected zone structure after welding needs aging treatment to achieve the best material state, but its aging temperature is inconsistent with the stress relief temperature of heat-resistant steel after welding , so it is difficult to obtain a welded joint with complete performance and no welding defects at one time
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.
[0026] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.
[0027] In the welding and heat treatment method of an aging-strengthened nickel-based superalloy and a heat-resistant steel in this embodiment, the material of the base material 1 is an aging-strengthened nickel-based superalloy, the material of the base material 2 is heat-resistant steel, and the base material 1 For solid solution, comprising the following steps:
[0028] Step 1, using a solid solution superalloy welding consumable-welding base metal-welding groove to form a transition layer;
[00...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a welding and heat treatment method for an aging-strengthened nickel-based high-temperature alloy and heat-resistant steel, and belongs to the technical field of welding connection of the aging-strengthened nickel-based high-temperature alloy and the heat-resistant steel. According to the welding and heat treatment method for the aging-strengthened nickel-based high-temperature alloy and the heat-resistant steel, a first base material is made of the aging-strengthened nickel-based high-temperature alloy, a second base material is made of the heat-resistant steel, and the first base material is in a solid solution state. The welding and heat treatment method comprises the following steps that firstly, a first solid solution type high-temperature alloy welding material is adopted for welding a welding groove of the first base material, and a transition layer is formed; secondly, aging heat treatment is conducted on the first base material; thirdly, a second solidsolution type high-temperature alloy welding material is adopted for welding the transition layer of the first base material and the second base material, and the transition layer of the first base material and the second base material are connected to form a welding connector; and fourthly, stress-relieving heat treatment is conducted on the welding connector. By the adoption of the welding and heat treatment method, the welding connector between the aging-strengthened nickel-based high-temperature alloy and the heat-resistant steel almost has no defects, and the structures and the performance of all areas of the welding connector are better.
Description
technical field [0001] The invention relates to a welding and heat treatment method of an age-strengthened nickel-based superalloy and a heat-resistant steel, and belongs to the technical field of welding connection of an aging-strengthened nickel-based superalloy and a heat-resistant steel. Background technique [0002] When the steam temperature of the steam turbine increases to 650°C or even higher, the requirements for the oxidation and corrosion resistance, thermal stability, and high-temperature durability of the rotor material are extremely strict. Traditional ferritic alloy steel and new austenitic steel can no longer To meet the requirements of use, nickel-based superalloys must be used. [0003] The use of integral forged nickel-based superalloy rotors is not suitable or cannot be realized, no matter from the casting and forging process of nickel-based superalloys (there is a technical bottleneck in the smelting and forging tonnage of superalloys), or from the econ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02C21D9/50C22F1/10
CPCB23K31/02B23K2103/04B23K2103/08C21D9/50C22F1/10
Inventor 熊建坤杨林徐健聂甫恒余勇文仲波郑亮亮曹天兰钟玉向冲毛桂军吴海峰许德星王大勇邓传印
Owner DONGFANG TURBINE CO LTD