STUDY ON THE EFFECT OF COMPOSITION AND VARIATION OF Sn/Zn COOLING MEDIA ON NICKEL ALLOY STEEL THROUGH HOT FORGING AND AUSTEMPERING

STUDY ON THE EFFECT OF COMPOSITION AND VARIATION OF Sn/Zn COOLING MEDIA ON NICKEL ALLOY STEEL THROUGH HOT FORGING AND AUSTEMPERING. Laterite steel with nickel content is expected to be a solution to overcome the lack of domestic steel availability and dependence on imports. This research was conducted to develop Nickel-Chromium-Molybdenum alloy steel used Grinding ball for cement industrial applications. Grinding ball is the one of imported steel products needed to be crushing and size reduction the ores or cement. In addition to import issues, grinding balls have a significant problem: their mechanical properties that do not meet SNI 1049 require the material to have a minimum hardness value of 45 HRC. In this study, the characteristics of Nickel alloy steel were investigated further through heat treatment of forgings heated at the austenitizing temperature of 950 °C and austempering with variations in the cooling medium of Sn/Zn solution. The cooling medium was chosen because it has a melting temperature in the phase diagram area to form the bainite microstructure with complex and challenging characteristics, both of which are required in material for grinding ball applications. In particular, the hardness value that passed the SNI 1069 standard was the use of samples with a Cr-Mo alloy of 1%-wt with a hardness value of 45.92 HRC for Sn Austemper and 48.07 HRC for Zn austemper.

Download Full-text

AISI 8615

Alloy Digest ◽

10.31399/asm.ad.sa0180 ◽

1965 ◽

Vol 14 (7) ◽

Keyword(s):

Fracture Toughness ◽

Alloy Steel ◽

Heat Treating ◽

Case Hardening ◽

Low Carbon ◽

Heavy Duty ◽

Core Strength ◽

Nickel Chromium ◽

Steel Mills ◽

Case Hardening Steel

Abstract AISI 8615 is a low-carbon, nickel-chromium-molybdenum alloy steel capable of producing high core strength and toughness. It is a case hardening steel recommended for heavy duty gears, cams, shafts, chains, fasteners, piston pins, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-180. Producer or source: Alloy steel mills and foundries.

Download Full-text

UNS G81150

Alloy Digest ◽

10.31399/asm.ad.sa0453 ◽

1990 ◽

Vol 39 (11) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Low Carbon ◽

Wear Resistant ◽

Nickel Chromium ◽

Steel Mills ◽

Medium Strength ◽

Strength And Toughness

Abstract UNS G 81150 is a low-carbon nickel-chromium-molybdenum carburizing steel recommended for applications where a core of medium strength and toughness combined with a wear-resistant carburized case is sufficient. It has medium hardenability and can be used without carburizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-453. Producer or source: Alloy steel mills and foundries.

Download Full-text

SANDVIK SANBAR 64

Alloy Digest ◽

10.31399/asm.ad.sa0503 ◽

1999 ◽

Vol 48 (10) ◽

Keyword(s):

Wear Resistance ◽

Fatigue Strength ◽

Tensile Properties ◽

Nickel Alloy ◽

Alloy Steel ◽

Heat Treating ◽

High Nickel ◽

Hardened Condition ◽

High Nickel Alloy

Abstract Sandvik SANDAR 64 is an air-hardening high nickel alloy steel with good response to carburizing. It has excellent fatigue strength and wear resistance in the case hardened condition. Common applications include extension and shank rods. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on forming and heat treating. Filing Code: SA-503. Producer or source: Sandvik.

Download Full-text

UNS H86170

Alloy Digest ◽

10.31399/asm.ad.sa0435 ◽

1988 ◽

Vol 37 (12) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Low Carbon ◽

Heavy Duty ◽

Good Strength ◽

Nickel Chromium ◽

Steel Mills

Abstract UNS H-86170 is a low-carbon nickel-chromium-molybdenum carburizing steel of good hardenability. Its core is characterized by good strength and toughness. It is recommended for heavy-duty applications such as cams, chains, fasteners, gears, shafts and piston pins. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-435. Producer or source: Alloy steel mills and foundries.

Download Full-text

SAE 8115

Alloy Digest ◽

10.31399/asm.ad.sa0292 ◽

1973 ◽

Vol 22 (8) ◽

Keyword(s):

Corrosion Resistance ◽

Physical Properties ◽

Surface Treatment ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Low Carbon ◽

Nickel Chromium ◽

Steel Mills ◽

Medium Strength

Abstract SAE 8115 is a low-carbon nickel-chromium-molybdenum carburizing steel recommended for applications where a core of medium strength and toughness combined with a wear-resistant carburized case is sufficient. It has medium hardenability and can be used without carburizing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-292. Producer or source: Alloy steel mills and foundries.

Download Full-text

AISI 3150

Alloy Digest ◽

10.31399/asm.ad.sa0143 ◽

1963 ◽

Vol 12 (3) ◽

Keyword(s):

Fracture Toughness ◽

Physical Properties ◽

Tensile Properties ◽

Nickel Alloy ◽

Elastic Properties ◽

Alloy Steel ◽

Heat Treating ◽

Great Depth ◽

Medium Carbon ◽

Steel Mills

Abstract AISI 3150 is a medium carbon, chromium-nickel alloy steel having great depth hardness, high elastic properties and excellent fatigue resistance and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on heat treating and machining. Filing Code: SA-143. Producer or source: Alloy steel mills and foundries.

Download Full-text

AISI 94B30

Alloy Digest ◽

10.31399/asm.ad.sa0118 ◽

1961 ◽

Vol 10 (8) ◽

Keyword(s):

United States ◽

Fracture Toughness ◽

Physical Properties ◽

Tensile Properties ◽

Alloy Steel ◽

Heat Treating ◽

Heavy Duty ◽

United States Steel Corporation ◽

Nickel Chromium ◽

Shock Resistance

Abstract AISI 94B30 is a mild carbon, nickel-chromium-molybdenum-boron alloy steel having good hardenability, toughness, and shock resistance for heavy duty service. AISI 94B30H is the corresponding H-Steel which has specified hardenability limits with some modification of chemical ranges. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-118. Producer or source: United States Steel Corporation.

Download Full-text

Evaluation of Marginal Misfit of Metal Frameworks Welded by Gas-Torch, Laser, and Tungsten Inert Gas Methods

International Journal of Dentistry ◽

10.1155/2018/9828929 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6

Author(s):

Wilson Matsumoto ◽

Paula Pastana Beraldo ◽

Rossana Pereira de Almeida ◽

Ana Paula Macedo ◽

Beatriz Roque Kubata ◽

...

Keyword(s):

Inert Gas ◽

Marginal Fit ◽

Nickel Chromium ◽

Before And After ◽

Master Model ◽

The One ◽

Flexural Resistance ◽

One Way Anova ◽

Silicone Matrix ◽

And Tungsten

Purpose. The objective of this study was to evaluate the marginal fit and the flexural resistance of nickel-chromium frameworks welded by different techniques, gas-torch, laser, and tungsten inert gas (TIG), compared with that of frameworks made via one-piece casting. Methods. To evaluate the marginal fit, a master model was fabricated simulating four implants. Transfers and replicas were used to transfer the positions of the implants to the model, using a silicone matrix. The bars were waxed up and casted. Three assessments of misfit were performed for each implant using a stereomicroscope before and after welding in two predetermined regions, totaling six readings for each implant. To evaluate the flexural resistance, one group was made casting the specimens in one piece. Other 3 groups using gas-torch, laser, and TIG welding techniques were made after sectioned transversally. The data showed normal distribution and two-way ANOVA for marginal fit and one-way ANOVA for flexural resistance, and Tukey’s posttest (α=0.05) was performed. Results. For the marginal fit, the three welding methods presented similar results and were different from one-piece casting. For the flexural resistance, significant differences were observed among the studied groups (p<0.001), and the one-piece group presented higher resistance compared to the three welding techniques. Conclusions. Within the limits of this study, the three welding techniques yielded similar misfit results, and the laser and TIG techniques presented similar flexural resistance but lower than gas-torch and one-piece casting.

Download Full-text