Study on Oxidation Resistance of Tool Materials for Machining Superalloy

2016 ◽  
Vol 836-837 ◽  
pp. 215-219 ◽  
Author(s):  
Teng Da Wang ◽  
Er Liang Liu ◽  
Zhen Li
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Tool Material ◽  
Cemented Carbide ◽  
Carbide Tool ◽  
Ceramic Tool ◽  
Temperature Oxidation ◽  
Coated Carbide Tool ◽  
Oxidation Resistant ◽  
Coated Carbide

The high temperature oxidation phenomenon will occur on the tool-workpiece contact area when machining the superalloy. Two kinds of cemented carbide tools (YG6X, YG8) are selected, the coated carbide tool and coated ceramic tool which are suitable for machining superalloy are selected. The resistance furnace is used for heating tool material, and the oxidation resistance experiments are carried out. The results show that: WC which is included in the cemented carbide tool is oxidized to WO3 and the Co is oxidized to Co3O4, Ti which is included in the coated carbide tool is oxidized to TiO2. The grain of the tool is smaller, the oxidation resistance is better. The oxidation resistant of coated carbide tool is better than the non-coated tools. The coated ceramic tool is not substantially oxidized in high temperature situation. The merits order of the oxidation resistant properties is that: coated ceramic tool>coated carbide tool > YG6X>YG8.

ENHANCING HIGH-TEMPERATURE OXIDATION RESISTANCE OF TITANIUM ALLOY WITH KF110-B4C-Ag THROUGH LASER TECHNOLOGY

2021 ◽  
Author(s):  
ZHAO ZHANG ◽  
JIANING LI ◽  
ZHIYUN YE ◽  
CAINIAN JING ◽  
MENG WANG ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Mass Gain ◽  
Temperature Oxidation ◽  
Laser Technology ◽  
X Ray ◽  
Ta15 Titanium Alloy ◽  
Oxidation Resistant

In this paper, the high-temperature oxidation resistant coating on the TA15 titanium alloy by laser cladding (LC) of the KF110-B4C-Ag mixed powders was analyzed in detail. The scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS) images indicated that a good metallurgy bond between the fabricated coating/TA15 was formed; also the fine/compact microstructure was produced after a cladding process. The oxidation mass gain of TA15 was higher than that of the coating after LC process, which were 3.72 and 0.91[Formula: see text]mg[Formula: see text]cm[Formula: see text], respectively, at 60[Formula: see text]h, greatly enhancing the high temperature oxidation resistance.

Microstructure and High-Temperature Oxidation-Resistant Performance of Several Silicide Coatings on Nb-Ti-Si Based Alloy Prepared by Pack Cementation Process

2012 ◽  
Vol 533 ◽  
pp. 145-165
Author(s):  
Jing Li ◽  
Xi Ping Guo
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Outer Layer ◽  
High Temperature Oxidation ◽  
Layer Structure ◽  
Middle Layer ◽  
Alloy Coating ◽  
Deposition Process ◽  
Temperature Oxidation ◽  
Oxidation Resistant

The microstructure and high-temperature oxidation-resistant performance of several silicide coatings on an Nb-Ti-Si based alloy were revealed in the present work. These silicide coatings were prepared respectively at 1250°C for 8 h by pack siliconizing process, Si-Y co-deposition process and Si-Al-Y co-deposition process (with different Al contents in the packs). The results showed that the purely siliconized coating was composed of a (Ti,Nb)5Si3 ouer layer, a (Nb,X)Si2 (X represents Ti, Cr and Hf elements) middle layer and a (Ti,Nb)5Si4 inner layer. A thicker and more compact double-layer structure including a (Nb,X)Si2 outer layer and a (Ti,Nb)5Si4 inner layer was observed in the Si-Y co-deposition coating. In addition, a higher Y content (about 0.34 at. %) in the outer layer of the Si-Y co-deposition coating was obtained, while the Y content was only about 0.06 at. % in the purely siliconized coating. The Si-Al-Y co-deposition coating possessed a (Nb,X)Si2 outer layer, a (Ti,Nb)5Si4 middle layer and an Al, Cr-rich inner layer. A suitable addition of Al powders (5 wt. %) in the packs was beneficial to thicken the (Nb,X)Si2 outer layer, while a sharp reduction in the coating thickness was found when excess Al powders (10 wt. %) was added in the packs. However, compared with the former coating, the later coating prepared with more Al powders in the packs resulted in a slight increase in the content of Al and Y in the (Nb,X)Si2 outer layer from about 0.21 and 0.54 at. % to 0.87 and 0.79 at. % respectively. The thickness and microstructure of the scales formed on above four coatings upon oxidation at 1250°C for either 5 h or 100 h were comparatively investigated. The oxidation resistance of these silicide-type coatings was notably enhanced by the addition of Y and Al. The Si-Al-Y co-deposition coating, which was prepared with 5 wt. % Al powders in the pack, possessed the best oxidation resistance due to its optimum dense and continuous scale and compact coating remained. Keywords: Nb-Ti-Si based alloy; coating; microstructure; oxidation-resistant perfor-mance *Corresponding author. Tel./fax: +86 29 88494873. E-mail address: [email protected] (X. Guo).

A27 Cutting of cemented carbide using a diamond coated carbide tool under the minute feed rate

2014 ◽  
Vol 2014.10 (0) ◽  
pp. 39-40
Author(s):  
Akihiro YOSHIDA ◽  
Masato OKADA ◽  
Tatsuaki FURUMOTO ◽  
Hidehito WATANABE ◽  
Naoki ASAKAWA
Keyword(s):  
Feed Rate ◽  
Cemented Carbide ◽  
Carbide Tool ◽  
Coated Carbide Tool ◽  
Coated Carbide

Environmental Resistant Coatings for High Temperature Mo and Nb Silicide Alloys

MRS Advances ◽  
2017 ◽  
Vol 2 (25) ◽  
pp. 1323-1334 ◽  
Author(s):  
J.H. Perepezko
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
Environmental Performance ◽  
Self Healing ◽  
Temperature Oxidation ◽  
Environmental Resistance ◽  
Performance Constraints ◽  
Oxidation Resistant ◽  
Pack Cementation Process

ABSTRACTThe challenges of a high temperature environment impose severe material performance constraints in terms of melting point, oxidation resistance and structural functionality. In metallic systems the multiphase microstructures that can be developed in the Mo-Si-B system and Nb silicide alloys offer useful options for high temperature applications. Since the alloy compositions that exhibit the lowest oxidation rate will most likely not yield optimum mechanical properties performance, it is important to develop robust and compatible oxidation resistant coatings. An effective strategy to achieve the necessary environmental resistance is based upon the use of an integrated Mo-Si-B based coating that is applied by a pack cementation process to develop an aluminoborosilica surface and in-situ diffusion barriers with self-healing characteristics for enhanced oxidation resistance. The environmental performance requires resistance not only to high temperature oxidation, but also resistance to water vapor, CMAS (calcia-magnesia-aluminosilica) attack, hot corrosion and thermal cycling. Under these extended environmental conditions the Mo-Si-B based coating exhibits robust performance.

A Study of the Sensitivity of Parameters Affecting Coated Tool Life in High Speed Milling Superalloy GH4169

2013 ◽  
Vol 651 ◽  
pp. 436-441
Author(s):  
Wei Wei Liu ◽  
Xu Sheng Wan ◽  
Yuan Yu ◽  
Feng Li ◽  
Hao Chen
Keyword(s):  
High Temperature ◽  
Tool Life ◽  
High Speed ◽  
Depth Of Cut ◽  
Linear Regression Method ◽  
Carbide Tool ◽  
High Temperature Alloy ◽  
High Speed Milling ◽  
Coated Carbide Tool ◽  
Coated Carbide

Through the orthogonal test of the TiALN coated carbide tool high-speed milling of high-temperature alloy GH4169, the empirical formula of the tool life are acquired by using multiple linear regression method. On the basis of this formula, studying the absolute sensitivity and relative sensitivity of TiALN coated carbide tool life for milling speed, depth of cut and feed; The results showed that in the process of high-speed milling of high-temperature alloy GH4169, tool life decreased with the increase of milling speed, feed and depth of cut; tool life is most sensitive to the change of milling speed; change of feed take second place and milling depth is the least sensitive.

scholarly journals Experimental Study on the Oxidation and Diffusion Behavior of Inconel 625 and Tool Materials

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 471
Author(s):  
Erliang Liu ◽  
Ning Wang ◽  
Jin Qi ◽  
Zhichao Xu ◽  
Xia Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Products ◽  
Inconel 625 ◽  
Ceramic Tool ◽  
Temperature Oxidation ◽  
X Ray ◽  
Suitable Material ◽  
Tool Materials ◽  
Coated Carbide ◽  
And Diffusion

Oxidation and diffusion simulation experiments were conducted to choose the most suitable material for cutting the Inconel 625 superalloy. Three tool materials, WC/Co, coated carbide, and ceramic were used as tool materials in the oxidation simulation experiment. The three tool materials were heated for 30 min in a high-temperature furnace, and the high-temperature oxidation products were examined with scanning electron microscopy and X-ray diffraction (XRD). Tools were heated for 90 min in a vacuum tube furnace. The element diffusion behaviors of Inconel 625 and the tool materials were analysed with energy-dispersive X-ray spectroscopy and XRD. Some of the WC and Co in the WC/Co and coated carbide tool materials was oxidized to WO3, Co3O4, and CoWO4, and the oxidation reaction became more intense as the temperature increased. For the ceramic tool, only TiC was oxidized to TiO2, which indicates good oxidation resistance. In the diffusion couple experiments, the diffusion levels of the three tool materials increased with temperature, but the degree of influence differed. Diffusion of elements was hindered by the (Al, Ti) N coating of the coated carbide and effectively inhibited by the Al2O3 in the ceramic tool. In terms of oxidation and diffusion, the most suitable tool material for cutting Inconel 625 was the ceramic, followed by the coated carbide and then WC/Co.

scholarly journals Development of High Temperature Oxidation Resistant Titanium Alloy Arconic-THORTM

2020 ◽  
Vol 321 ◽  
pp. 11005
Author(s):  
Fusheng Sun ◽  
Ernie Crist
Keyword(s):  
Titanium Alloy ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Thermal Exposure ◽  
Fatigue Properties ◽  
Temperature Oxidation ◽  
Beta Alloy ◽  
Heat Treated ◽  
Oxidation Resistant

The aeroengine and airframe applications of titanium alloys are often limited by their insufficient oxidation resistance to the aggressive environment at higher temperatures. A high temperature oxidation resistant titanium alloy (Arconic-THORTM) has been developed. This alloy is an alpha-beta alloy with superior oxidation resistance and improved creep resistance. The oxidation weight gain of Arconic-THORTM is much lower than Ti-6242 and Beta 21s in the temperature range up to 750˚C. The room and elevated temperature properties of Arconic-THORTM are comparable to those for Ti-6242. Arconic-THORTM also shows superior, post-thermal-exposure tensile strength, ductility, and fatigue properties, and is capable of being cold formed, hot formed, and superplastic formed, welded and heat treated to different product geometries. The microstructures and mechanical properties for sheet manufactured from the production ingots are presented and discussed in this study.

scholarly journals Effect of Y2O3 Addition on High-Temperature Oxidation of Binderless Tungsten Carbide

2021 ◽  
Vol 8 ◽  
Author(s):  
Jinfang Wang ◽  
Dunwen Zuo ◽  
Liu Zhu ◽  
Zhibiao Tu ◽  
Xiao Lin ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Boundary ◽  
Tungsten Carbide ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Antioxidant Properties ◽  
Cemented Carbide ◽  
Temperature Oxidation ◽  
Pinning Effect ◽  
Adhesive Ability

High-temperature oxidation tests were carried out on binderless tungsten carbide (WC) with different Y2O3 contents (0, 1, 2, 3, and 4 wt.%) and on YG3 cemented carbide. Results demonstrated that the addition of Y2O3 led to a significant improvement in the high-temperature oxidation resistance of binderless tungsten carbide compared with those of YG3 cemented carbide and pure tungsten carbide. After oxidation at 800°C for 120 min, the oxidation weight gain of binderless tungsten carbide with 1 wt.% Y2O3 was 58.54 mg cm−2, corresponding to the reduction by 47.7% compared with YG3 cemented carbide. In the high temperature oxidation process, WC in the triangle grain boundary was first oxidized to Y2WO6 due to the high activity of Y2O3 which is present mainly in the WC grain boundaries. The transport of W4+ outward along the grain boundary and the diffusion of O2− inward along the grain boundary were hindered by Y2WO6 with the high ionic radius and thus the antioxidant capacity of binderless tungsten carbide was improved. Meanwhile, the adhesive ability of oxidation layer on the substrate was enhanced with the “pinning effect” of Y2WO6, which also led to the improvement of oxidation resistance. With the Y2O3 content increasing from 1 to 4 wt.%, the antioxidant properties of binderless tungsten carbide gradually declined, and the antioxidant performance of binderless tungsten carbide with 1 wt.% Y2O3 was found to be the best.

AK STEEL 441

Alloy Digest ◽  
2006 ◽  
Vol 55 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Ferritic Stainless Steel ◽  
High Temperature Oxidation ◽  
High Temperature Strength ◽  
Temperature Oxidation ◽  
Temperature Performance

Abstract AK Steel 441 has good high-temperature strength, an equiaxed microstructure, and good high-temperature oxidation resistance. The alloy is a niobium-bearing ferritic stainless steel. This datasheet provides information on composition, hardness, and tensile properties as well as deformation. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-965. Producer or source: AK Steel.

Sign in / Sign up

Export Citation Format

Share Document