Quality control method and process for solder joint of aluminum basket basket welding machine

The key to ensuring the quality of the welded joints of aluminum basket basket welding machines and improving its reliability is to use advanced methods and equipment to implement quality control in the production process. Especially due to the extensiveness, importance, and representativeness of the spot welding process, spot welding quality control technology has always been the frontier and hot spot in the field of aluminum basket basket welding machines.

As we all know, the spot welding process is a highly nonlinear, multi-variable coupling and a large number of random uncertainties. It has its own characteristics, such as extremely short nucleation time, unobservable in a closed state, and difficulty in feature signal extraction. This results in the welding spot quality parameters (nugget diameter, strength, etc.) that cannot be detected directly, but only through some spot welding process parameters (welding current, inter-electrode voltage, dynamic resistance, energy, thermal expansion electrode displacement, acoustic emission, infrared radiation, and Ultrasonic, etc.) Indirect inference, which greatly affects the accuracy and reliability of spot welding quality monitoring.

After a long period of exploration and practice, researchers have obtained the following consensus: The development of multi-parameter integrated monitoring technology for aluminum basket basket welding machines is an effective way to improve spot welding quality monitoring accuracy, that is, to make full use of monitoring information and adopt reasonable modeling. The means to establish a reasonable multiple nonlinear monitoring model and to provide accurate and reliable spot welding quality information within a wide range of conditions is the key to quality control technology. Research shows that fuzzy logic theory, numerical simulation technology and expert systems are expected to solve the real direct control of spot welding quality and push the research of spot welding quality control technology to a peak.

DUPLEX STAINLESS STEEL

Duplex Stainless Steels Available

Yuhong Group supplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.


Duplex Stainless Steel Overview

Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.


Today, modern duplex stainless steels can be divided into three groups:
Lean Duplex such as LDX2101
Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
Super Duplex such as Ferralium 255 and Zeron 100 and LDX2507

Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications. Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.


What are the Characteristics of Duplex Stainless Steels ?
Very good resistance to uniform corrosion
Very good resistance to pitting and crevice corrosion
High resistance to stress corrosion cracking and corrosion fatigue
High mechanical strength
Good sulfide stress corrosion resistance
Good abrasion and erosion resistance
Good fatigue resistance high energy absorption
Low thermal expansion
Good weldability


In what Applications are Duplex Stainless Steels® used ?
Oil and gas equipment
Offshore technology
Seawater desalination plants
Chemical industry, especially when handling chlorides
Flue-gas cleaning
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Bridges
Storage tanks
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts

Super Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube,Super Duplex Heat Exchanger Tube,Super Duplex Metal Heat Exchanger Tube

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