Composition design and preparation method of J55-level expansion pipe adopted in petroleum and natural gas drilling
A technology for oil and natural gas and expansion pipes, which is applied in heat treatment equipment, manufacturing tools, furnaces, etc., can solve the problems of high cost and unfavorable expansion and application of expandable technology, and achieves low production cost, easy mass production, alloy composition and heat treatment. simple craftsmanship
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0029] Use the J55 grade expansion pipe hot-rolled steel plate whose alloy element content is shown in Table 1, and put it into the furnace with a temperature of A C3 Above 100°C (T 1 =900℃) in a box-type resistance furnace for heat preservation t 1 After 30 minutes, the water was quenched to room temperature, and then placed in a furnace with a temperature of A C1 ~A C3 T between 2 (740°C) in a box-type resistance furnace for heat preservation t 2 After 30 minutes, air-cool to room temperature, and finally put into the furnace at temperature A C1r ~A C1 T between 3 (650°C) in a box-type resistance furnace for heat preservation t 3 After 30 min air cool to room temperature. Obtain J55 grade steel for expansion pipes with mechanical properties shown in Table 2. It can be seen from Table 2 that the uniform elongation of the expanded pipe steel plate reaches more than 20%, and the yield strength is 492MPa, the tensile strength is 651MPa, and the half-thick V-notch Charpy...
Embodiment 2
[0035] Table 1 Composition (mass fraction) of J55 steel grade expanded pipe in Example 2
[0036] C mn Si S P Ni Fe and unavoidable impurities 0.08% 2.0% 0.7% <0.008%
<0.01%
0.5% margin
[0037] The J55 grade expansion pipe hot-rolled steel plate shown in Table 1 in the above-mentioned embodiment 2 is adopted with the alloy element content, and it is put into the furnace temperature as A C3 Above 50°C (T 1 =850℃) in a box-type resistance furnace for heat preservation t 1 After 15 minutes, the water was quenched to room temperature, and then placed in a furnace with a temperature of A C1 ~A C3 T between 2 (780°C) in a box-type resistance furnace for heat preservation t 2 After 15 minutes, air-cool to room temperature, and finally put into the furnace with temperature A C1r ~A C1 T between 3 (680°C) in a box-type resistance furnace for heat preservation t 3 After 15 min air cool to room temperature. Obtain J55 grade steel for expan...
Embodiment 3
[0041] Table 1 Composition (mass fraction) of J55 steel grade expanded pipe in Example 5
[0042] C mn Si S P Ni Fe and unavoidable impurities 0.12% 2.5% 0.5% <0.008%
<0.01%
0.3% margin
[0043] The J55 grade expansion pipe hot-rolled steel plate shown in Table 1 in the above-mentioned embodiment 3 is adopted with the alloy element content, and it is put into the furnace temperature as A C3 above 75°C (T 1 =875℃) in a box-type resistance furnace for heat preservation t 1 After 60 minutes, the water was quenched to room temperature, and then placed in the furnace as if the temperature was A C1 ~A C3 T between 2 (710°C) in a box-type resistance furnace for heat preservation t 2 After 60 minutes, the water is cooled to room temperature, and finally put into the furnace at a temperature of A C1r ~A C1 T between 3 (600°C) in a box-type resistance furnace for heat preservation t 3 After 60 min air cool to room temperature. Obtain J55 g...
PUM
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| yield strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More