Research on Elements Distribution in Hot Dip Aluminum Silicon Coating of Hot Stamping Steel

2014 ◽  
Vol 1063 ◽  
pp. 73-77 ◽  
Author(s):  
Zi Liu Xiong ◽  
Hong Qiang Liu ◽  
Xue Hui Wang ◽  
Yi Cui ◽  
Jie Xue ◽  
...  
Keyword(s):  
High Temperature ◽  
Surface Coating ◽  
Chemical Elements ◽  
Hot Stamping ◽  
Middle Layer ◽  
Element Content ◽  
Process Conditions ◽  
Al Content ◽  
Fe Content ◽  
Si Content

Al-Si coating in different hot dip process conditions were made by a hot-dip galvanizing simulator, and distribution regularities of chemical elements in coating were studied by means of GDS, SEM, EDS and XRD. The results show that the hot dip temperature has no obvious impact on elements distribution in coating, but has some impact on Si content in surface coating. The hot dip time has no obvious impact on surface coating element content, but has distinct impact on deep coating element content. With the hot dip time increasing, Al content decreases, Fe content increases, and Si content decreases. Al-Si coating is composed of 3 layers, surface layer contains fine and close Al2O3 film, which has good anti-oxidation property on high temperature and hot stamping property, middle layer contains high melting point phase ,such as rich Fe phase , FeAl3 ,which has excellent anti-oxidation property on high temperature. The elements in diffusion layer can even be transited to basic steel, so coating has good adhesion property.

scholarly journals Identifikasi Fraksi Fe, Al, dan Si Amorf pada Beberapa Ordo Tanah di Lahan Kering Aceh Besar dengan Ekstraksi Ammonium Oksalat

2020 ◽  
Vol 4 (4) ◽  
pp. 618-628
Author(s):  
Ikhwani Fitri ◽  
Teti Arabia ◽  
Sufardi Sufardi
Keyword(s):  
Distribution Pattern ◽  
Distribution Patterns ◽  
Dry Land ◽  
Al Content ◽  
Fe Content ◽  
Ap Horizon ◽  
Amorphous Si ◽  
Si Content

Abstrak: Hasil penelitian menunjukkan bahwa kandungan Fe, Al, dan Si amorf pada tanah ordo Andisol di lahan kering Aceh Besar berkisar dari 0,61 – 0,65%, kandungan Fe amorf tertinggi terdapat pada horizon Ap sebesar 0,65%, sedangkan kandungan terendah terdapat pada horizon Bw 0,61%. Untuk kandungan Al amorf berkisar dari 5,20 – 3,02%, kandungan Al tertinggi terdapat pada horizon AB sebesar 5,20% sedangkan kandungan terendah terdapat pada horizon Ap 3,02%. Untuk kandungan Si amorf berkisar dari 6,81 – 5,92%, untuk kandungan Si tertinggi terdapat pada horizon Ap sebesar 6,81%, untuk kandungan terendah terdapat pada horizon Bw dengan kandungan 5,92%. Pola distribusi Fe, Al, dan Si amorf pada ordo Andisol di lahan kering Aceh Besar, kandungan Fe pada kedalaman 20 - 60 cm relatif stabil, untuk kandungan Al cenderung naik dari kedalaman 20 - 60 cm, kemudian untuk pola Si juga terjadi penurunan dari kedalaman 20 - 60 cm. Untuk kandungan Fe, Al, dan Si amorf pada ordo Oxisol berkisar dari 0,16 - 9,03%. Kandungan Fe berkisar dari 0,19 – 1,65% kandungan Fe tertinggi pada Oxisol terdapat pada horizon BA yaitu 1,65% dan kandungan terendah terdapat pada horizon Bo1 yaitu 0,16%, untuk kandungan Al berkisar dari 3,48 – 6,44% kandungan Al tertinggi terdapat pada horizon A yaitu 6,44% dan kandungan terendah terdapat pada horizon Bo1 yaitu 3,48%. Pada Si kandungannya berkisar dari 6,37 – 9,03%, kandungan Si tertinggi pada Oxisol terdapat pada horizon Bo1 yaitu 9,03% dan kandungan terendah terdapat pada horizon A yaitu 6,37%. Pola distribusi Fe, Al, da Si Oxisol di lahan kering Kabupaten Aceh Besar, kandungan Fe terjadi penurunan dari kedalaman 10 cm sampai kedalaman 104 cm, dan pada kandungan Al terjadi penurunan dari kedalaman 10 cm sampai kedalaman 104 cm. Kemudian untuk kandungan Si kandungannya relatif tetap.Fe, Al, and Si Amorf  in Andisol and in the Seulawah Valley Dryland, Aceh Besar DistrictAbstrac: The results showed that the content of Fe, Al, and Si amorphous in the Andisol order in dry land in Aceh Besar ranged from 0.61 to 0.65%, the highest amorphous Fe content was found in the Ap horizon of 0.65%, while the lowest content was at the Bw horizon of 0.61%. For the amorphous Al content ranges from 5.20 - 3.02%, the highest Al content is in the AB horizon of 5.20% while the lowest content is in the Ap 3.02% horizon. For the amorphous Si content ranges from 6.81 - 5.92%, for the highest Si content is in the Ap horizon of 6.81%, for the lowest content is found in the Bw horizon with 5.92% content. Amorphous Fe, Al, and Si distribution patterns in the Andisol order in Aceh Besar drylands, Fe content at a depth of 20 - 60 cm is relatively stable, for Al content tends to rise from a depth of 20 - 60 cm, then for the Si pattern there is also a decrease from a depth of 20 - 60 cm. For the content of Fe, Al, and Si amorphous in the Oxisol order ranges from 0.16 to 9.03%. The Fe content ranges from 0.19 - 1.65%, the highest Fe content in Oxisol is found on the BA horizon, which is 1.65% and the lowest content is on the Bo1 horizon, 0.16%, for Al content ranges from 3.48 - 6, 44% of the highest Al content is on the A horizon which is 6.44% and the lowest content is on the Bo1 horizon which is 3.48%. In Si content ranges from 6.37 - 9.03%, the highest Si content in Oxisol is in the Bo1 horizon which is 9.03% and the lowest content is in horizon A which is 6.37%. The distribution pattern of Fe, Al, and Si Si Oxisol in Aceh Besar Dryland District, Fe content decreased from a depth of 10 cm to depth 104 cm, and in the Al content decreased from a depth of 10 cm to a depth of 104 cm. Then for the womb the content is relatively fixed.

Preparation of Ternary Layered Ti3SiC2 Ceramic by SHS/PHIP

2008 ◽  
Vol 368-372 ◽  
pp. 1851-1854 ◽  
Author(s):  
Yue Lei Bai ◽  
Xiao Dong He ◽  
Chun Cheng Zhu ◽  
Xu Kun Qian
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Hot Isostatic Pressing ◽  
Main Phase ◽  
Raw Material ◽  
Al Content ◽  
Temperature Combustion ◽  
Si Content ◽  
High Temperature Combustion ◽  
Main Impurity

Ternary-layered Ti3SiC2 ceramic was prepared by self-propagation high temperature combustion synthesis with pseudo hot isostatic pressing (SHS/PHIP). The effect of Ti/C mol ratio, Si content and Al content on the phase composition of the products was investigated. Experimental results showed that the phase composition of SHS/PHIPed products was influenced greatly by Ti/C mol ratio and Si content in the raw material. When Ti/C mol ratio is 1.5, the main phase was TiC with only a little Ti3SiC2; the content of Ti3SiC2 increased greatly with increase of Si content. The main phase turned to Ti3SiC2 while TiC became the main impurity when the Ti/C mol ratio arrived at 2. With addition of aluminum, the content of Ti3SiC2 increased obviously and the distortion of lattice was caused in Ti3SiC2 crystals.

High Temperature Corrosion Behavior of Si-Containing Alloys in the Gas Phase of Air-(Na2SO4+25.7mass%NaCl)

2011 ◽  
Vol 696 ◽  
pp. 272-277 ◽  
Author(s):  
Toto Sudiro ◽  
Tomonori Sano ◽  
Akira Yamauchi ◽  
Shoji Kyo ◽  
Osamu Ishibashi ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Corrosion Behavior ◽  
Elevated Temperatures ◽  
High Temperature Corrosion ◽  
Ni Content ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Corrosion Resistant Alloy ◽  
Si Content

The objective of this study is to develop an excellent corrosion resistant alloy for high temperature coating applications. The Si-containing alloys consisting of CoNiCrAlY and CrSi2 alloys with varying Si and Ni content respectively were prepared by spark plasma sintering (SPS) technique. The corrosion behavior of these alloys was investigated in the gas phase of air-(Na2SO4+25.7mass%NaCl) at elevated temperatures of 923, 1073 and 1273K. The results showed that CoNiCrAlY alloy with 30mass% Si content and CrSi2 alloy with 10mass% Ni content were the most effective materials for application in the gas phase of air-(Na2SO4+25.7mass%NaCl) due to the formation of protective Al2O3/SiO2 and SiO2 scale, respectively. Therefore, it is realized that CoNiCrAlY-30mass% Si and CrSi2-10mass% Si coating are very effective for improving of high temperature corrosion resistance of STBA21 steel.

Research on high-temperature oxidation resistance, hot forming ability, and microstructure of Al–Si–Cu coating for 22MnB5 steel

2021 ◽  
Vol 40 (1) ◽  
pp. 397-409
Author(s):  
Ziliu Xiong ◽  
Zhangguo Lin ◽  
Jianjun Qi ◽  
Li Sun ◽  
Guangxin Wu ◽  
...  
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Hot Stamping ◽  
Optical Microscope ◽  
Hot Forming ◽  
Metal Compound ◽  
Temperature Oxidation ◽  
Substrate Steel

Abstract High-temperature oxidation resistance, hot formability, element distribution, and microstructure of Al-10% Si-(0.5–3.0%)Cu coating were investigated by means of glow discharge spectroscopy, optical microscope, scanning electron microscope, and energy-dispersive spectroscopy. Results show that the addition of Cu can increase high-temperature oxidation resistance above 950°C and improve hot formability so that no crack spreads into substrate steel as hot forming at 33.3% strain. Oxidation film structure is continual and compacting, and Si highly concentrates in the surface layer. The distribution of Cu has skin effect with peaking content 8.2% in the surface layer. After hot stamping, Al and Si diffuse into substrate steel, and Cu diffuses from inner to outer coating. Al–Si–Cu coating has smoother surface, straighter diffusion layer, and finer metal compound than Al–Si coating. Surface and diffusion layers are identified as aluminum oxide, Si-rich, and Cu phase and Al7SiFe2, Al3Fe, and CuAl3, respectively. Al-rich phase and the metal compound are composed of α-Al dissolving Fe, Si, and Cu and Al–Si matrix, Cu3Al, respectively.

Gate Stack Engineering for High Temperature Silicon Carbide CMOS ICs

2015 ◽  
Vol 2015 (HiTEN) ◽  
pp. 000033-000036 ◽  
Author(s):  
M.H. Weng ◽  
A.D. Murphy ◽  
D.T. Clark ◽  
D.A. Smith ◽  
R.F. Thompson ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
High Temperature ◽  
Elevated Temperatures ◽  
Systematic Evaluation ◽  
Process Conditions ◽  
Operating Characteristics ◽  
Gate Stack ◽  
Metal Insulator ◽  
Semiconductor Interfaces

The potential to thermally grow SiO2 on silicon carbide has resulted in it becoming the technology of choice to realise high temperature CMOS circuits. The challenge to achieve a high quality gate stack relies on engineering the metal-insulator-semiconductor interfaces to enable reliable high temperature functionality. Here we describe the effect of different process conditions for the formation of the dielectric layer on the characteristics of the resulting devices. The operating characteristics at elevated temperatures depend critically on the quality of the gate stack. Therefore a systematic evaluation of the intrinsic properties of the gate stack and data from reliability tests are needed.

scholarly journals The Evaluation on Corrosion Resistance and Dross Formation of Zn–23 wt% Al–0.3 wt% Si–x wt% Mg Alloy

Coatings ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 199 ◽  
Author(s):  
Wangjun Peng ◽  
Guangxin Wu ◽  
Rui Lu ◽  
Quanyong Lian ◽  
Jieyu Zhang
Keyword(s):  
Corrosion Resistance ◽  
Comparative Study ◽  
Thermodynamic Calculation ◽  
Hot Stamping ◽  
Mg Alloy ◽  
Al Content ◽  
Dross Particle ◽  
Immersion Corrosion ◽  
Dross Formation ◽  
Corrosive Resistance

: A comparative study of the corrosive resistance and dross formation of 55Al–Zn–1.6Si (wt%) (55AZS) and 23Al–Zn–0.3Si–xMg (wt%) (23AZS–xMg, x = 0, 1.5, 3) alloys are performed using immersion corrosion and dross formation test, respectively. The result of immersion corrosion testing shows that corrosive rate of the 23AZS alloy is lower than that of 55AZS alloy in the latter stage of immersion and 23AZS–1.5Mg alloy shows the optimal corrosive resistance compared to other alloys relatively. The result of dross formation test shows that the number of bottom dross particle formed in 23AZS–xMg (x = 0, 1.5, 3) alloy is less than that in 55AZS alloy. Moreover, the thermodynamic calculation is performed to reveal the solubility of Fe in the alloys, the result shows the solubility of Fe reduces as a decrease of Al content in the alloy, and the number of dross particle (Fe4Al13 and 6 (Al9Fe2Si2) phase) generated in 23AZS alloy is more than that in 55AZS alloy. In general, 23AZS–1.5Mg alloy has an advantage of less dross and a certain corrosion resistance and it is expected to be applied for the hot stamping process of coating.

scholarly journals Al-Ti-B4C materials obtained by high-temperature synthesis and used as a master-alloy for aluminum

2018 ◽  
Vol 243 ◽  
pp. 00010 ◽  
Author(s):  
Ilya Zhukov ◽  
Vladimir Promakhov ◽  
Yana Dubkova ◽  
Alexey Matveev ◽  
Mansur Ziatdinov ◽  
...  
Keyword(s):  
High Temperature ◽  
Burning Rate ◽  
Powder Mixture ◽  
Pure Aluminum ◽  
Al Alloy ◽  
Initial Powder ◽  
Temperature Synthesis ◽  
Al Content ◽  
High Temperature Synthesis ◽  
Al Powder

The paper presents microstructure, composition, and burning rate of Al alloy produced by high-temperature synthesis (SHS) from powder mixture Al-Ti-B4C with different concentration of Al powder. It has been established that the phase composition of materials obtained at gas-free combustion includes TiB2, Al, and TiC. It is shown that Al content growth powder in initial Al-Ti- B4C mixture from 7.5 to 40 wt.% reduces the burning rate of the powder from 9*10-3 to 1.8*10-3 m/s. For the system consisting of 60 wt.% of (Ti + B4C) and 40 wt.% of Al there is the increase in the porosity of the compacted initial powder mixture from 30 to 51 and reduction in the burning rate from 1.8 * 10-3 to 1 * 10-3 m/s. The introduction of 0.2 wt.% of the obtained SHS materials into the melt of pure aluminum causes reduction of the grain size of the resulting alloy from 1200 to 410 μm.

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