The Study on Welding Technology of 9Ni Steel

2018 ◽  
Vol 941 ◽  
pp. 516-523 ◽  
Author(s):  
Zhao Xia Qu ◽  
Li Qian Xia ◽  
Xiao Jie Wang
Keyword(s):  
Low Temperature ◽  
Industrial Application ◽  
Base Alloy ◽  
Welding Process ◽  
High Strength ◽  
Welding Technology ◽  
9Ni Steel ◽  
Alloy Type ◽  
Gleeble 3500 System ◽  
Welding Consumables

9Ni steel is a low temperature serving ferrite steel, providing high strength and excellent low temperature toughness, which could serve well at-196°C. Therefore 9Ni steel is widely used in storage tanks and transport ships for liquefied natural gas (LNG). Nevertheless there are some challenges in the industrial application, such as hot cracking, cold cracking, magnetic arc blow, etc.. In this paper, the study on the welding technology of 9Ni steel developed by Baosteel is carried out. Firstly the weldability is analyzed through welding thermal simulation using Gleeble 3500 system, Y-groove cracking test, maximum hardness in weld heat-affected zone test. The results prove that 9Ni steel could be welded without preheating. The welding consumables have also significant influence on the performance of the welded joints. In this paper the characteristics of different types of welding consumables, including ferrite base type, austenitic stainless steel type, Ni-base alloy type and Fe-Ni base alloy type are analyzed, then the selecting principle for welding consumables is proposed. Furthermore welding process experiments are undertaken using various welding procedures such as SMAW, GTAW, FCAW and SAW. The results indicate that heat input and interpass temperature should be controlled to ensure a sound weld joint. Finally fracture toughness at-196°C of 9Ni steel and its joint is studied using CTOD test. In conclusion, 9Ni steel developed by Baosteel has good weldability and can meet the requirements of industrial application.

Nickel Base Alloy Powder Spray Welding Process Application in Production

2013 ◽  
Vol 813 ◽  
pp. 129-131
Author(s):  
Yu Hai Xu ◽  
Yu Ping Zhao
Keyword(s):  
Alloy Powder ◽  
Base Alloy ◽  
Welding Process ◽  
Slag Inclusion ◽  
Thin Coating ◽  
Nickel Base Alloy ◽  
Parent Metal ◽  
Workpiece Surface ◽  
Welding Technology ◽  
Nickel Base

In this paper, we study Spray welding technology has been widely used in our country, it is between the spraying and welding process, the workpiece surface after spray welding coating is thin and smooth, dilution rate is extremely low, the deposited layer and base metal metallurgy, high bonding strength, density, and coating no slag inclusion, porosity and oxidation is suitable for occasions with thin coating. In 45Mn parent metal, for example, this paper mainly introduces the application of the technology in production.

scholarly journals Microstructure of Joints Made in High-Strength Steels Using the Robotic Laser Beam Welding Process

2020 ◽  
pp. 91-97
Author(s):  
Lechosław Tuz ◽  
Krzysztof Sulikowski
Keyword(s):  
Laser Beam ◽  
Laser Beam Welding ◽  
Welding Process ◽  
High Strength Steels ◽  
High Strength ◽  
Hardness Distribution ◽  
Key Factors ◽  
Welding Technology ◽  
Heat Treated ◽  
Made In

The paper presents the evaluation of weldability of unalloyed high strength heat-treated steels using of a laser beam welding robotic station. The key factors and properties affecting the usability of the aforesaid welding technology when welding the above-named steels were identified on the basis of the assessment of the microstructure and the measurements of hardness distribution in the related butt welded joints.

scholarly journals Effect of boron and manganese on hot crack resistance and toughness for flux cored arc weldments of 550 MPa grade tensile strength

2021 ◽  
Vol 66 (3) ◽  
pp. 101-113
Author(s):  
Park Su-Kil ◽  
Cho Young-Ho ◽  
Jee Chun-Ho ◽  
Kang Namhyun
Keyword(s):  
Tensile Strength ◽  
Carbon Steel ◽  
Low Temperature ◽  
Crack Resistance ◽  
High Strength ◽  
Hot Crack ◽  
Low Temperature Toughness ◽  
Welding Consumable ◽  
Steel Welds ◽  
Welding Consumables

The hot crack resistance and mechanical properties of flux cored arc (FCA) welds were investigated with three kinds of welding consumables having different boron (B) and manganese (Mn) contents for high strength carbon steel. The hot crack resistance measured from self-restraint testing strongly depended on the amount of B in the welding consumable. Welding consumable with higher B contents resulted in longer total crack length and an increased number of cracks. Boron was intensely detected near the grain boundary of the weld centerline by secondary ion mass spectrometry (SIMS) analysis, and precipitated with boron carbide (Fe23(C,B)6), as analyzed by transmission electron microscopy (TEM). This promoted hot crack propagation in the high strength carbon steel welds. However, removing B from the welding consumable decreased the low temperature toughness for root and face weld metal due to the growth of Ferrite Side Plate (FSP) in comparison with welding consumables having more B or Mn contents. The addition of Mn in the weld metal suppressed the formation of FSP and increased the low temperature toughness. Therefore, the minimization of B and the supplement of Mn successfully achieved hot crack resistance and low temperature toughness for high strength carbon steel welds of 550 MPa tensile strength.

Manufacturing Technology of Magnesium Alloy Bicycle Parts

2013 ◽  
Vol 747-748 ◽  
pp. 166-171
Author(s):  
Zi Mu Shi ◽  
Li Yuan Niu ◽  
Ji Xing Lin ◽  
Da Ren Sun ◽  
Yong Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Magnesium Alloy ◽  
Welding Process ◽  
High Strength ◽  
High Plasticity ◽  
Welding Technology ◽  
Shaped Tube ◽  
New Type ◽  
Welding Strength

One kind of deformed magnesium alloy with high strength and high plasticity was made to be bicycle parts. Meantime, the microstructure and mechanical properties of the magnesium alloy were analyzed. In addition, the deformation and welding technology of taper pipe and shaped tube of bicycle were studied. The results showed that the bicycle parts manufactured through extruding and welding of the new type magnesium alloy have high strength, good plasticity. The tensile strength can reach 321.3 MPa and the elongation is more than 20%. By adopting the new welding process of internal mending and cuttage grafting, the after-welding-strength is 90.2%. of the base metal Meanwhile, the industrialization level can meet the requirements of European Union (EU) vehicle standards.

The Nature of Delta Phase Precipitation in Inconel 718

1982 ◽  
Vol 40 ◽  
pp. 724-725
Author(s):  
L. S. Lin ◽  
C. C. Law
Keyword(s):  
Inconel 718 ◽  
Base Alloy ◽  
High Strength ◽  
Physical Metallurgy ◽  
Nickel Base Alloy ◽  
Phase Precipitation ◽  
Weight Percentage ◽  
Delta Phase ◽  
The Subject ◽  
Nickel Base

Inconel 718, a precipitation hardenable nickel-base alloy, is a versatile high strength, weldable wrought alloy that is used in the gas turbine industry for components operated at temperatures up to about 1300°F. The nominal chemical composition is 0.6A1-0.9Ti-19.OCr-18.0Fe-3Mo-5.2(Cb + Ta)- 0.1C with the balance Ni (in weight percentage). The physical metallurgy of IN 718 has been the subject of a number of investigations and it is now established that hardening is due, primarily, to the formation of metastable, disc-shaped γ" an ordered body-centered tetragonal structure (DO2 2 type superlattice).

Features of welding technology for pipes from high-strength steels

2017 ◽  
Vol 7 (6) ◽  
pp. 54-59
Author(s):  
Nikolay G. Goncharov ◽  
◽  
Oleg I. Kolesnikov ◽  
Alexey A. Yushin ◽  
◽  
...  
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Welding Technology

INCONEL ALLOY 722

Alloy Digest ◽  
1965 ◽  
Vol 14 (4) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Age Hardening ◽  
Nickel Base Alloy ◽  
Inconel Alloy ◽  
Temperature Performance ◽  
Nickel Base

Abstract INCONEL Alloy 722, formerly Inconel W alloy, is a high strength, high-temperature nickel-base alloy responding to age hardening heat treatments for maximum properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-100. Producer or source: Huntington Alloy Products Division, An INCO Company.

UDIMET 520

Alloy Digest ◽  
1962 ◽  
Vol 11 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Elevated Temperatures ◽  
Base Alloy ◽  
High Strength ◽  
Heat Treating ◽  
Nickel Base Alloy ◽  
Nickel Base

Abstract UDIMET 520 is a nickel-base alloy recommended for applications where high strength at elevated temperatures is required. It is suitable for service at temperatures up to 1800 F. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-74. Producer or source: Special Metals Inc..

EVANOHM

Alloy Digest ◽  
1960 ◽  
Vol 9 (4) ◽  
Keyword(s):  
Electrical Resistivity ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Temperature Coefficient ◽  
Base Alloy ◽  
Nickel Base Alloy ◽  
Temperature Coefficient Of Resistance ◽  
High Electrical Resistivity ◽  
Nickel Base

Abstract EVANOHM is a nickel-base alloy having low temperature coefficient of resistance and high electrical resistivity. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on joining. Filing Code: Ni-57. Producer or source: Wilbur B. Driver Company.

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