A method for manufacturing pressure vessel support steel for pressurized water reactor nuclear power plant
A pressurized water reactor nuclear power plant and pressure vessel technology, applied in the field of steel rolling, can solve the problems of Z-direction performance and flaw detection of steel plates, reduce production costs, etc., achieve the reduction and improvement of core segregation and inclusion levels, and reduce production costs Effect
Active Publication Date: 2020-09-29
ANGANG STEEL CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The invention provides a method for manufacturing pressure vessel supporting steel for pressurized water reactor nuclear power plants, which adopts the continuous casting slab rolling process, thereby fundamentally solving the problem that the rolled steel plate is damaged due to element segregation, porosity and microcracks in the core. directional performance and flaw detection failures, and can significantly reduce production costs
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 moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The method for manufacturing pressure vessel support steel for pressurized water reactor nuclear power plants of the present invention. The chemical composition of the steel plate is as follows by mass percentage: C 0.15%~0.18%, Si 0.15%~0.35%, Mn 1.20%~1.65%, P ≤0.015%, S≤0.005%, Ni 0.50%~0.85%, Alt 0.02%~0.05%, Cr≤0.15%, V≤0.02%, Ti≤0.05%, N≤0.015%; the thickness of the steel plate≤100mm;
[0015] The production process of the steel plate includes smelting, continuous casting, heating and rolling; among them:
[0016] The heating process adopts three-stage heating, the temperature of the preheating section is ≤800℃, and the heating time is 0.5-1h; the temperature of the second heating section is 1100~1150℃, and the heating time is 0.3~0.8h; the temperature of the first heating section is 1250~1280℃, heating The time is 0.6~1.5h; the temperature of the soaking section is 1230~1250℃, and the heating time is 0.8~1.5h;
[0017] The continuous casting billet in the rolling proce...
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
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method for manufacturing steel for bearing a pressure vessel of a pressurized water reactor power plant. The production process includes smelting, continuous casting, heating and rolling. Three-section type heating is adopted in the heating procedure. The temperature of a preheating section is smaller than or equal to 800 DEG C, the temperature of a secondary heating section is 1100-1150 DEG C, the temperature of a primary heating section is 1250-1280 DEG C, and the temperature of a soaking section is 1230-1250 DEG C. Two-stage control rolling is adopted for a continuously-cast billet in the rolling procedure. The initial rolling temperature of rough rolling at the first stage is 1050-1100 DEG C, and a low-speed heavy reduction mode is adopted for rolling. The initial rolling temperature of finish rolling at the second stage is 840-880 DEG C, and the finish rolling temperature is 780-820 DEG C. According to the method, a continuously-cast billet rolling technology is adopted, and therefore the problem that the Z-direction property and flow detection of steel plates after rolling are unqualified due to element segregation, looseness and microcracking of the central portions of the steel plates is solved fundamentally; and moreover, production cost can be greatly reduced.
Description
Technical field [0001] The invention relates to the technical field of steel rolling, in particular to a manufacturing method of steel for supporting pressure vessels of a PWR nuclear power plant. Background technique [0002] In order to realize the transformation of my country's energy strategy and its solemn commitment to carbon emission reduction in the international community, and to improve the living and working environment of our nationals, vigorously developing nuclear power will surely become an important measure for my country's future clean energy development. [0003] With the gradual liberalization of nuclear power policies and the acceleration of the localization of nuclear power units, the localization of high-end nuclear power equipment will inevitably increase significantly. As nuclear power equipment has been in service for many years in harsh environments such as high temperature, high pressure, and neutron radiation, the steel plate used for equipment manufactu...
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 Patents(China)
IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/46C22C38/50C22C38/58C21D8/02
Inventor 隋松言田宇颜秉语王小强
Owner ANGANG STEEL CO LTD