Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Chang, Shih-Hsien; Tang, Tzu-Piao; Huang, Kuo-Tsung

doi:10.2355/isijinternational.50.569

Cited by 32 publications

(25 citation statements)

References 12 publications

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“…25,26) Our previous study showed that the passivation probability in −0.4 −1.0 V crosses a potentially large range. 27) In this study, there was a slight change in the corrosion potential of the Ti-8Mo-xNi specimens, and the corrosion current varied through the different sintering temperatures and Ni contents after the corrosion tests. A lower corrosion current appeared at the 1175 C sintering temperature.…”

Section: Effect Of the Ni Content And Sintering Temperature On Corrosmentioning

confidence: 99%

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

et al. 2016

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In this study, three different powders are mixed and used to produce Ti-8Mo-xNi alloys in three different proportions: Ti-8Mo-4Ni, Ti8Mo-6Ni and Ti-8Mo-8Ni. The Ti-Mo-Ni alloys simultaneously undergo various vacuum sintering temperatures of 1125, 1150, 1175 and 1200 C, respectively. The experimental results show that the Ti-8Mo-8Ni alloys acquire a higher sintering density (98.9%) and hardness (52.1 HRC) after sintering at 1175 C for 1 h. However, due to the grain growth and increased amount of nickel in the Ti-8Mo-8Ni alloys, the transverse rupture strength (TRS) shows an obvious decrease (as compared with Ti-8Mo-6Ni, the TRS value decreasing from 1177 to 685 MPa). Consequently, the suitable Ni content of the Ti-8Mo-6Ni alloys which proves advantageous to the TRS results from the uniform distribution of the TiNi intermetallic compound precipitates within the β matrix. The sintered Ti-8Mo-8Ni alloys also possess the lowest corrosion current (I corr = 1.87 × 10 −7 A·cm −2) and highest polarization resistance (56084 Ω·cm 2 ) in 3.5 mass% NaCl solutions. This result con rms that sintered Ti-8Mo-8Ni alloys effectively improve corrosion resistance.

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Section: Effect Of the Ni Content And Sintering Temperature On Corrosmentioning

confidence: 99%

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

et al. 2016

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“…Another factor is the Fe element that escapes from matrix, while combined with aluminum and silicon elements to generate the Fe x Al y Si z compound at the interface during the erosion test processes. 6) Significantly, the columnar structure of CrN-H13 specimen seems can effectively inhibit the formation of Fe x Al y Si z compound after 4 h corrosion test. However, it will gradually reduce the corrosion resistance after a longer test (5 h).…”

Section: (D)mentioning

confidence: 99%

“…6) Figure 3(a) shows the microstructure of a cross-section of O-H13 specimens where the depth of the oxynitriding layer is about 75 « 1 µm; and the EDS analysis (see Table 3) of a, b, and c are the coated Ni layer, Fe oxides, and the nitriding layer, respectively. Due to the outermost layer of gray oxynitriding film is very thin (12 µm) and hard to find it.…”

Section: (D)mentioning

confidence: 99%

“…To extend die-casting die life, different thermo-chemical treatments are often applied to the die surface. Our previous study 6) found that oxynitriding specimens could form a passive film, which contributed a better anti-corrosion property during the corrosion test.…”

Section: Introductionmentioning

confidence: 99%

“…During filling, solidification and the die holding stages, the molten aluminum attacks the die steel surface. 6) AISI H13 tool steel is normally used for Al die-casting dies, given its good temperature resistance, high hardness, and good resistance to thermal fatigue, erosion and wear. To extend die-casting die life, different thermo-chemical treatments are often applied to the die surface.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Thermal Erosion and Wear Resistance on AISI H13 Tool Steel by Various Surface Treatments

Chang

Huang²,

Wang

2012

Mater. Trans.

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In this study AISI H13 steel was treated with oxynitriding, CrN coating, and CrN coated with oxynitriding to investigate the molten loss for melting A380 aluminum alloy and wear resistance. The experimental results indicate that the minimum melting loss appeared in duplex surface treatments of CrN coated with oxynitriding after a 3 h erosive test. Weight loss was only 0.8%; however the untreated specimen was 3.2%. In addition, all specimens following the different surface treatments, showed a higher wear resistance after the wear test. The untreated specimen showed obvious traces of plough cracks. Conversely, other surface treated specimens experienced very shallow wear. This result shows that the wear resistance of AISI H13 can be effectively improved by performing various surface treatments. The lowest coefficient of friction also appeared in the duplex surface treatment of CrN coated with oxynitriding. The average value of frictional coefficient was 0.28.

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Generating Mechanism of Large Heterogeneous Carbonitrides with Multiple Layers in H13 + Nb Bar

Xie

Cheng

Chen³

et al. 2016

steel research int.

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The characteristics and generating mechanism of heterogeneous carbonitride with micron size in H13 þ Nb bar are studied. Three types of precipitates are observed according to the number of layers, that is, two-layer ones, three-layer ones, and four-layer ones. Two-layer precipitate contains the oxide core and the outer Ti-V-rich carbonitride, while three-layer precipitate has one more Nb-rich carbonitride at the outside. Four-layer precipitate has a V-rich carbonitride at the outmost layer besides the inner three types of phases similar to that in the three-layer precipitate. The size of these large precipitates can be even up to tens of microns. The oxide cores are mainly stoichiometric spinel MgAl 2 O 4 and generated in the liquid steel before solidification. The compositional characteristics and precipitating sequence of carbonitride can be well explained through calculation by Scheil-Gulliver model in Thermo-Calc. Ti-V-rich phase precipitates first during solidification, after which Nb-rich phase and V-rich phase precipitates successively. Some dissolution occurs between the different layers during the following temperature reducing and heating treatment process.

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Improvement of Aluminum Erosion Behavior and Corrosion Resistance of AISI H13 Tool Steel by Oxidation Treatment

Cited by 32 publications

References 12 publications

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

Effects of Thermal Erosion and Wear Resistance on AISI H13 Tool Steel by Various Surface Treatments

Generating Mechanism of Large Heterogeneous Carbonitrides with Multiple Layers in H13 + Nb Bar

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