loading

How to distinguish between welding slag and molten iron during welding?

During the welding process, the welder can see a layer of covering floating on the surface of the molten pool, which is commonly known as welding slag. How to distinguish between welding slag and molten iron is very important for welders who are new to electric welding.

1. Formation of welding slag

Welding slag is the product of the melting of the electrode coating and the high-temperature metallurgical reaction of the weld. Welding slag is mainly composed of metal oxides or non-metal oxides and other mineral salts. Because its density is higher than the density of liquid iron during welding, Much smaller, therefore, the welder can easily observe a layer of floating matter on the upper part of the molten pool during the welding process. In terms of color, it is darker than the liquid iron in the molten pool, and is opposite to the welding direction. It flows in the direction and rear sides, cools as welding continues, and becomes welding slag.

2. The role of welding slag

Welding slag mainly protects the weld bead during the welding process. The liquid metal in the molten pool is covered by the slag to separate the liquid metal and the air and prevent the intrusion of harmful gases such as oxygen, nitrogen, and hydrogen in the air. To protect the weld bead. Therefore, during the welding process, we must pay attention to the welding angle to ensure that the welding slag flows to the rear and rear sides, so as to observe the shape of the weld and avoid the occurrence of defects such as slag inclusions and pores. Ensure welding quality

How to distinguish between welding slag and molten iron during welding?
 1

GET IN TOUCH WITH Us
recommended articles
Resource Thought Leadership News & Events
Heron Intelligent Monitoring Systems: The "Intelligent Guardians" of Industrial Production Quality
In the field of industrial production, product quality is the lifeblood of enterprises, and precise and efficient quality monitoring is a crucial link in ensuring product quality. A series of quality monitoring systems launched by Guangzhou Heron Intelligent Equipment Co., Ltd. integrate cutting - edge technology and industrial applications to safeguard industrial production quality, becoming the trusted "intelligent guardians" of numerous enterprises.
Heron Innovates Welding Technology of Contact Part, Leading the Intelligent Upgrade of Low-Voltage Electrical Industry
Heron's new moving contact welding line in the low-voltage electrical field is a game-changer. With patented tech like the silver tips feeding mechanism, it automates processes, cuts labor costs, boosts efficiency (4,500 pieces/11.5 hrs, 80% OEE), is eco-friendly, and drives industry upgrades.
Exploring the Efficient Welding of the Metal World: High-Strength Steel
This article focuses on the welding of high-strength steel. It expounds its characteristics like high strength and good toughness, and points out the technical key points such as pre-welding preparation and method selection. It highlights the application of resistance welding in it, including technical features, application scope, operation key points, difficulties and solutions, providing important guidance for related welding work.
Exploring the Efficient Welding of the Metal World:Hot-formed Steel
This paper explores hot-formed steel welding. It details its ultra-high strength, good accuracy yet poor weldability. Key points include material selection, parameter optimization. Main methods like resistance, laser, arc welding are introduced. Challenges like cracks and solutions are also covered.
Exploration of Efficient Welding in the Aluminum Alloy World
The article centers around aluminum alloy. It first states its characteristics like lightweight, high strength, corrosion resistance, etc. Then it details common welding methods such as resistance welding, TIG welding, and MIG/MAG welding, along with their features and application scopes. It further analyzes technical challenges in welding including deformation, porosity, oxide film, and joint softening, and proposes corresponding solutions. Overall, it emphasizes the significance of aluminum alloy welding in modern industry, the need to master proper welding techniques, and looks forward to the innovation and progress of aluminum alloy welding technology with the development of science and technology.
Exploring the Efficient Welding of the Metal World: Stainless Steel
The article mainly focuses on stainless steel. It first elaborates on the characteristics of stainless steel, including different types like austenitic, martensitic, ferritic and duplex stainless steel, and its properties such as corrosion resistance. Then it presents main welding methods like resistance welding, manual arc welding, gas-shielded welding, laser welding and others, along with their application scopes and operating points. It also analyzes technical difficulties in welding such as hot cracking, intergranular corrosion, welding deformation and porosity, and proposes corresponding solutions. Overall, it emphasizes the complexity and importance of stainless steel welding.
FSPR robotic system: The best way to solve the riveting problems of automotive roof component
This article introduces the FSPR Robotic Riveting Gun System as a solution to the riveting challenges faced by the automotive industry, particularly in the assembly of new car roof components made of multi-layered, differently shaped workpieces. The system utilizes a servo cylinder to deliver high-tonnage riveting force with precision, complemented by real-time monitoring and data analysis. Its successful application has solved technical challenges, enhanced the reliability of riveted connections, contributed to lightweighting automotive bodies, and driven technological progress in the automotive manufacturing industry.
Resistance Welding Defects And Preventive Measures
Resistance welding is widely used in automobile manufacturing, aerospace, electronic manufacturing and other industries due to its efficiency and energy-saving properties.
Resistance Welding Equipment Maintenance Guide: Cleaning and Maintenance Tips
Resistance welding machines, being the cornerstone of modern industry, exhibit a consistent and dependable performance that directly correlates with the seamless operation of the production line and the superior quality of the products.
High Power MFDC Welder Improves Busbar Welding Efficiency and Quality for Frame Breaker
In the low-voltage electrical industry, the welding quality of the conductive busbar is crucial to the overall performance and stability of the equipment.
no data

HERON, make welding simple

CONTACT US

Contact Person: Christina Liu
Tel: 86 20 87813325 / 86 20 87819588 / 86 20 87815075

Fax: 86 20 87813346

Email: info@heronwelder.com

Address: No.63 Xin Yi Road, Taiping Town, Conghua District, Guangzhou China

HERON, make joining simple
Copyright © 2025 HERON Intelligent Equipment Co., Ltd. - Heron-welder.com | Sitemap
Customer service
detect