Welding process of ultrahigh-strength precipitated hardened stainless steel
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A precipitation hardening, ultra-high-strength technology, used in welding equipment, welding media, welding equipment, etc., can solve the problems of poor welding quality and low strength of stainless steel, and achieve the effect of stable welding quality, high strength, and convenient welding or processing.
Active Publication Date: 2019-10-01
ANHUI MASTEEL ENG & TECH GRP
View PDF7 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] Aiming at the problems of low strength and poor welding quality of stainless steel in the prior art, th
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Example Embodiment
[0042] Example 1
[0043] A welding process for ultra-high-strength precipitation hardening stainless steel includes the following steps:
[0044] (1) Conduct chemical and mechanical index analysis on the stainless steel base material to be welded and select the welding method; select the welding method according to the analysis of the stainless steel base material, so that the entire welding process is smooth and the welding quality is good;
[0045] (2) The design of the joint groove; Figure 5 As shown, specifically, the groove angle in the joint groove is 60±2.5°, the butt gap is 2mm, and the single-sided "V" groove setting is adopted, and there is no blunt edge, which ensures that the stainless steel base material can be fully welded when welding. , It is convenient for machining, and effectively improves the welding quality;
[0046] (3) Cleaning and preparation work before welding; preferably, the step (3) includes the following steps:
[0047] (3.1) Clean up impurities: remove ...
Example Embodiment
[0058] Example 2
[0059] It is basically the same as Example 1. In this example, a stainless steel pressure vessel in a large chemical plant is taken as an example. The stainless steel vessel is made of 0Cr17Ni7Al, the service temperature is 200°C, and the wall thickness is δ12; the welding process for the material 0Cr17Ni7Al is as follows:
[0060] (1) Conduct chemical and mechanical index analysis on the welded stainless steel base metal and select the welding method; the chemical composition of the 0Cr17Ni7Al base metal is shown in Table 1 below, and the mechanical properties of the 0Cr17Ni7Al base metal are shown in Table 2 below:
[0061] Table 1 0Cr17Ni7Al chemical composition (%)
[0062] C Si MnSP 0.07-0.10≤0.50.5-1.0≤0.03≤0.035 Cr Ni MoNAl 16.0-18.06.5-7.50.2-0.30.04-0.080.75-1.2
[0065] It can be seen from the above table that the base material stain...
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 process of ultrahigh-strength precipitated hardened stainless steel, and belongs to the field of chemical machinery. Aiming at the problems that the strength of stainless steel is low and the welding quality is poor in the prior art, the welding process of the ultrahigh-strength precipitation hardened stainless steel is provided. The welding process comprises thefollowing steps that index analysis is carried out on a welded stainless steel base material, and a welding method is selected; a joint groove is designed; preweld cleaning and preparation work is carried out; a welding material is selected according to whether the performance of the welding seam is required to be matched with the performance of the base material or not; solid solution treatment is carried out on the stainless steel base material, and welding is carried out when the stainless steel base material in a solid solution state; and heat treatment is carried out on the stainless steel base material after welding. According to the welding process of ultrahigh-strength precipitated hardened stainless steel, the stainless steel is subjected to the solid solution treatment, and the stainless steel is welded in the solid solution state, so that the welding process is smooth, the welding quality is stable, and welding hot cracks are reduced; and the heat treatment is carried out after welding is completed, so that the tensile strength of the stainless steel is improved to 1100 MPa or above, and the stainless steel has relatively high strength, toughness and plasticity.
Description
technical field [0001] The invention belongs to the field of chemical machinery, and more specifically relates to a welding process of ultra-high-strength precipitation-hardening stainless steel. Background technique [0002] In the field of pressure vessel manufacturing, especially large-scale chemical plants and synthetic ammonia industries, stainless steel vessels are often used. Stainless steel is widely used due to its high strength and good corrosion resistance. Currently commonly used stainless steel is divided into ferritic stainless steel, austenitic stainless steel and martensitic stainless steel. In the chemical industry, due to the increase in the use temperature of the product, it is necessary to replace it with heat-resistant high-strength stainless steel. The tensile strength of the high-strength steel must reach at least 1100Mpa. Austenitic stainless steel and ferritic stainless steel have better corrosion resistance, but the strength cannot be adjusted by h...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more