Surface characteristic and wear resistance of QT-700-2 nodular cast iron after laser quenching combing with shot peening treatment

2021 ◽  
pp. 127589
Author(s):  
Ke Zhan ◽  
Yalong Zhang ◽  
Lei Bao ◽  
Zheng Yang ◽  
Bin Zhao ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Shot Peening ◽  
Nodular Cast Iron ◽  
Surface Characteristic ◽  
Laser Quenching

Process Optimization and Properties of Laser Cladding High Vanadium High Speed Steel Coatings on Nodular Cast Iron

2013 ◽  
Vol 712-715 ◽  
pp. 611-614 ◽  
Author(s):  
Ni Jun Xu ◽  
Jian Bin Lv ◽  
Ting Sun ◽  
Chang Sheng Liu
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Laser Cladding ◽  
High Speed ◽  
High Speed Steel ◽  
Nodular Cast Iron ◽  
Vanadium Content ◽  
Treatment Technology ◽  
Metallurgical Bonding ◽  
Steel Rolls

As withstanding very high loads, thermal cycling leading to thermal fatigue, and severe environmental in the steel industry, rolls with long service life are specially required. High speed steel with high vanadium content is a newly-developed wear-resistance material that has been studied and used in some countries for making steel rolls. As a surface treatment technology, laser cladding can fabricate coating to improve the wear resistance of substrate. In this paper, the substrates for laser cladding were nodular cast iron rolls, Nd: YAG solid pulsed laser was used to explore the feasibility of preparation high vanadium high speed steel (HVHSS) coatings. The Nd: YAG laser cladding results that the coated layers combined metallurgically with the substrate with a lot of microcracks. The average microhardness up to 650 HV is more than 2 times as high as that of the substrate. After laser remelting, a fully dense and crack free HVHHS coating with an excellent metallurgical bonding was deposited. The presence of VC in the coating mainly improves the microhardness of coating up to about 650 HV.

Process Optimization and Properties of Laser Cladding High Speed Steel Coatings on Nodular Cast Iron

2011 ◽  
Vol 418-420 ◽  
pp. 1527-1530
Author(s):  
Jian Bin Lv ◽  
Zheng Yi Wang ◽  
Xue Wei Wang ◽  
Chang Sheng Liu
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Laser Cladding ◽  
High Speed ◽  
Continuous Wave ◽  
High Speed Steel ◽  
Nodular Cast Iron ◽  
Wear Property ◽  
Treatment Technology ◽  
Red Hardness

Rolls in the steel industry withstand very high loads, thermal cycling leading to thermal fatigue, and severe environmental. How to improve the wear resistance and elongate the service life of rolls matters a lot in reducing the consumption of rolls. In recent years, because of its better red-hardness and wear property, high speed steel (HSS) was used to manufacture the new type composite rolls. As a surface treatment technology, laser cladding can fabricate coating to improve the wear resistance of substrate. In this paper, the substrates for laser cladding were nodular cast iron rolls, Nd:YAG solid pulsed laser and continuous wave CO2laser were both used to explore the feasibility of preparation HSS coatings. The Nd:YAG laser cladding results that the coated layers combined metallurgically with the substrate with a lot of microcracks. The average microhardness up to 600 HV is about 2 times as high as that of the substrate. The CO2laser cladding results that: fully dense and crack free clad surfaces of high speed steel with an excellent metallurgical bonding were deposited. The average microhardness up to 900 HV is about 3 times as high as that of the substrate. The high-temperature (500 °C) wear rate is 40% of nodular cast iron’s in 30 min.

Wear Mechanism of Si3N4/TiC Micro-Nano-Composite Ceramic Tool in Dry Machining of Nodular Cast Iron

2013 ◽  
Vol 319 ◽  
pp. 79-83
Author(s):  
Zhi Jie Lü ◽  
Ming Feng Ding ◽  
Jun Zhao
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Tool Wear ◽  
Cutting Tool ◽  
Composite Ceramic ◽  
Nodular Cast Iron ◽  
Dry Machining ◽  
Ceramic Tool ◽  
Nano Composite ◽  
Ceramic Cutting Tool

In this paper, a type of Si3N4/TiC micro-nano-composite ceramic tool materials were fabricated via hot pressing technique by adding Si3N4 and TiC nanoparticles and with Al2O3 and Y2O3 as additives. Tool wear in dry machining of nodular cast iron with Si3N4/TiC micro-nano-composite ceramic tool were investigated, in comparison with a commercial Sialon ceramic tool. For determination of the wear resistance, the workpiece which is prepared to be used in the experiment, 400 mm in length and 120 mm in diameter, is machined in lathe. Turning experiments were carried out at three different cutting speeds, which were 110, 175, and 220 m/min respectively. Feed rate (f) and depth of cut (ap) were kept fixed at 0.1mm/rev and 0.5mm. The results show that the two types of cutting tools have similar cutting tool wear behavior, while the Si3N4/TiC micro-nano-composite tool exhibits a better wear resistance than that of the Sialon tool. The wear of Si3N4/TiC micro-nano-composite ceramic cutting tool is mainly dominated by the abrasion, while the wear of Sialon ceramic cutting tool is dominated by the abrasive action, microcracking and pullout of grains.

scholarly journals Microstructure and Tribological Properties of Fe-Based Laser Cladding Layer on Nodular Cast Iron for Surface Remanufacturing

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 974
Author(s):  
Dongya Zhang ◽  
Zhongwei Li ◽  
Hongwei Fan ◽  
Hongbin Rui ◽  
Feng Gao
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Tribological Properties ◽  
Dry Friction ◽  
Equivalent Stress ◽  
Nodular Cast Iron ◽  
Friction Coefficients ◽  
Cladding Layer ◽  
Starved Lubrication ◽  
Lubrication Conditions

In this study, a cladding layer and nitriding layer were prepared on nodular cast iron, to provide guidance for remanufacturing of nodular cast iron. Their microstructure and composition and the tribological properties under dry and starved lubrication conditions were studied. Meanwhile, the contact stresses at different friction stages were simulated through the finite element method. The micro-hardness of the cladding layer and nitriding layer were 694 HV0.5 and 724.5 HV0.5, which were 4 times and 4.2 times higher than that of the substrate. For dry friction conditions, the wear resistance of the cladding layer and nitriding layer were 113.2 times and 65.5 times that of the substrate. For starved lubrication conditions, the friction coefficients of the cladding layer and nitriding layer were lower than that of the substrate. In addition, their average friction coefficients and wear resistance were gradually reduced with the increase in load. Contact simulation showed that the maximum equivalent stress gradually increased with the friction coefficient during the dry friction, and the peak value of von Mises stress on the nitriding layer was larger than that of the cladding layer, and the nitriding layer was more likely to yield and peel off.

Effect of scanning speed during PTA remelting treatment on the microstructure and wear resistance of nodular cast iron

2014 ◽  
Vol 21 (4) ◽  
pp. 363-370 ◽  
Author(s):  
Hua-tang Cao ◽  
Xuan-pu Dong ◽  
Qi-wen Huang ◽  
Zhang Pan ◽  
Jian-jun Li ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Scanning Speed ◽  
Nodular Cast Iron

Shot Peening of Nodular Cast Iron

1989 ◽  
pp. 883-888 ◽  
Author(s):  
S. Parent-Simonin ◽  
J. Fargues ◽  
J. F. Flavenot
Keyword(s):  
Cast Iron ◽  
Shot Peening ◽  
Nodular Cast Iron

Improved Wear Resistance of Austempered Gray Cast Iron Using Shot-Peening Treatment

2020 ◽  
Author(s):  
Yu Liu ◽  
Gary Barber ◽  
Weiwei Cui ◽  
Bingxu Wang
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Shot Peening ◽  
Gray Cast Iron ◽  
Gray Cast

Study on the Plasma Beam Surface Remelting Modification of Nodular Cast Iron

2010 ◽  
Vol 152-153 ◽  
pp. 1751-1754 ◽  
Author(s):  
Li Yang ◽  
Gang Li
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Nodular Cast Iron ◽  
Hardened Layer ◽  
Ductile Cast Iron ◽  
Graphite Phase ◽  
Plasma Beam ◽  
Hardness Tester ◽  
Operating Current ◽  
And Performance

To improve the wear resistance of ductile cast iron, plasma beam remelt-solidified hardening on the surface is adopted. Scanning electron microscope and micro-hardness tester is used to analyze the microstructure and performance for plasma beam remelt-solidified layer of nodular cast iron. The results show that micromelted-solidified hardening of the nodular cast iron surface can be obtained when the operating current is up to 50A. Along with the operating current increases, the width and depth of remelt-solidified layer and hardened layer increase, but the hardness goes down. After the hardening, graphite phase in remelt-solidified region is vanishing. The microstructure of remelt-solidified region is tiny ledeburite and remained austenite and of transformation hardening region is acicular martensite, remained austenite，spheroid graphite and ferrite .In transition region, martensite shell around nodular graphite appears, which is advantageous to enhance the wear resistance. From the surface to inner, the microhardness declines first and then increases, after achieving the maximum value the hardness slowly drops. The highest microhardness appears at the second-surface layer which has a certain distance to the surface.

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