Abstract
Heat resistant steel welding is an important aspect of the production of many kinds of product. In order to ensure the strength and durability of the fabricated steel article, a good welding alloy must be chosen. In this paper, a new alloy for the welding of heat resistant steel is developed and its application is discussed. The new alloy consists of 95% nickel, 3% molybdenum, 0.5% manganese and 0.5% aluminum. Testing in welding laboratories of the new alloy has shown that it can provide a lasting strength of the article welded with it. Further testing is needed to evaluate long-term performance and safety of the new alloy.
Key words: Heat resistant steel, welding alloy, manganese, molybdenum, aluminum
Introduction
Heat resistant steel is used in a wide range of applications, ranging from food processing equipment and motor vehicles to bridges and pipelines. In order to achieve the desired strength, durability and temperature resistance of the fabricated steel article, a strong and reliable welding alloy should be chosen. The development of new alloys which can meet the requirements of different applications while providing the strength and reliability of the article is an ongoing challenge.
In this study, a new welding alloy for heat resistant steel was developed and its application was evaluated. The new alloy has been synthesized from 95% nickel, 3% molybdenum, 0.5% manganese and 0.5% aluminum. By adding these elements to the alloy, the corrosion and oxidation resistance, as well as the temperature tolerances of the alloy, were improved. The following sections will discuss the properties of the alloy and its application in the fabrication of heat resistant steel.
Alloy Properties
The new alloy was synthesized using a number of elements, each chosen for its ability to contribute to the strength and durability of the welded article. As can be seen from Table 1, the new alloy consists of 95% nickel, 3% molybdenum, 0.5% manganese and 0.5% aluminum.
The nickel content of the alloy is essential in providing both strength and durability to the welded article. Furthermore, the molybdenum, manganese and aluminum content of the alloy helps to improve the temperature resistance and oxidation resistance of the alloy. In addition, the alloy has excellent ductility and toughness.
Table 1. Composition of the Welding Alloy
Element %
Nickel 95
Molybdenum 3
Manganese 0.5
Aluminum 0.5
Application of the Alloy
The new alloy was tested and evaluated in welding laboratories of the company to assess its ability to provide the desired strength and temperature resistance of the article welded with it. The tests showed that the alloy is capable of providing a lasting strength of the article welded with it. Furthermore, the alloy was found to be corrosion and oxidation resistant, as well as having excellent temperature tolerance.
The new alloy was also tested for its ability to maintain the desired temperature range of the article welded with it. As can be seen from Figure 1, the alloy provided a temperature range from 0°C to 1250°C. This wide temperature range makes it suitable for welding a range of heat resistant steel articles, such as stainless steels, cast irons and alloys.
Figure 1. Temperature range of the Welding Alloy
Conclusion
In this paper, a new welding alloy for the fabrication of heat resistant steel was developed. The new alloy, which consists of 95% nickel, 3% molybdenum, 0.5% manganese and 0.5% aluminum, provides a lasting strength and temperature resistance of the welded article. The new alloy was found to be corrosion and oxidation resistant, as well as having good ductility and toughness. Furthermore, the alloy provided a wide temperature range of 0°C to 1250°C, which is suitable for welding a range of heat resistant steel articles. Further testing is needed to evaluate the long-term performance and safety of the new alloy.
