Method for improving welding performance of iron-nickel base alloy through grain boundary sawtooth treatment
An iron-nickel-based alloy and weldability technology, which is applied in the field of iron-nickel-based alloy welding, can solve problems such as liquefaction cracks at the grain boundary in the affected area of the joint, poor weldability, etc., and achieve the effect of improving weldability and quality
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] In this embodiment, the grain boundary zigzag treatment and vacuum electron beam welding of a J75 alloy plate with a thickness of 12.0 mm are carried out. The specific implementation process is as follows:
[0030] 1. The J75 alloy sheet is a hot-rolled sheet, and the chemical composition of the hot-rolled sheet meets the requirements of GJB 5724-2006 "Specification for Hydrogen-Resistant Steel Bars". The J75 alloy plate is placed in a vacuum heat treatment furnace and kept at 960-1030°C (1000°C in this embodiment) for 10-20min (18min in this embodiment);
[0031] 2. Cool the J75 alloy plate after heat preservation treatment in step 1 to 840-860°C (850°C in this embodiment) with the furnace, and control the cooling rate to 2-5°C / min (3°C / min in this embodiment) ;
[0032] 3. Insulate the J75 alloy plate after controlled cooling in step 2 at 840-860°C (850°C in this embodiment) for 1-3h (1.5h in this embodiment);
[0033] 4. Cool the J75 alloy plate after the heat pres...
Embodiment 2
[0042] In this embodiment, the grain boundary zigzag treatment and vacuum electron beam welding of a J75 alloy plate with a thickness of 3.0 mm are performed. The difference from Example 1 is that the thickness of the welded J75 alloy plate is 3.0mm, and the sawtooth treatment and welding process parameters are adjusted accordingly.
[0043] A 3.0mm thick J75 alloy hot-rolled plate with the same chemical composition as in Example 1 was used, placed in a vacuum heat treatment furnace, kept at 980°C for 12min, then cooled to 850°C at a cooling rate of 3°C / min and kept for 1h; After the end, the J75 alloy plate was cooled to 740°C at a cooling rate of 8°C / min, and aged at this temperature for 8h, and then placed in air to cool to room temperature. The sawtoothed J75 alloy plate is subjected to vacuum electron beam welding. The welding adopts a single-cycle welding method. The welding process parameters are: accelerating voltage 50KV, welding current 14mA, focusing current 2.325A,...
Embodiment 3
[0048] In this embodiment, the grain boundary zigzag treatment and vacuum electron beam welding of a J75 alloy plate with a thickness of 15.0 mm are performed. The difference from Example 1 is that the thickness of the welded J75 alloy plate is 15.0 mm, and the sawtooth treatment and welding process parameters are adjusted accordingly.
[0049] A 15.0mm thick J75 alloy hot-rolled plate with the same chemical composition as in Example 1 was used, placed in a vacuum heat treatment furnace, kept at 1020°C for 20min, then cooled to 850°C at a cooling rate of 3°C / min and kept for 2h; After the end, the J75 alloy plate was cooled to 740°C at a cooling rate of 8°C / min, and aged at this temperature for 12 hours, and then placed in air to cool to room temperature. The sawtoothed J75 alloy plate is subjected to vacuum electron beam welding. The welding adopts a single-cycle welding method. The welding process parameters are: acceleration voltage 60KV, welding current 29mA, focusing curr...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| strength coefficient | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More