Laser melting of alloy cast irons

The past studies indicated that thermal fatigue resistance of cast irons could be improved by partly laser melting treatment. However the only disadvantage of this technology is that the enhancement of thermal fatigue resistance would be limited because of the fixed chemical composition of sample matrix. For this purpose, the laser surface alloying of CrNi was selected for changing both the compositions and the microstructures of laser treated zone, and the effects of alloy powder compositions on thermal fatigue behavior were also investigated in this paper. The results indicate that the alloy elements distribute homogeneously, and their contents increase markedly in the non-smooth unit on the alloyed layer. The non-smooth unit is strengthened further compared with laser melting treatment. Thermal fatigue resistance of cast iron is enhanced evidently by laser surface alloying of CrNi powders, and for all samples tested, those treated with 25%Cr-75%Ni powders have the best thermal fatigue resistance.

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Investigation of Stress Field and Wear Depth of Cr-Mo-Cu Alloy Cast Iron with Nano-Additives under Abrasive Wear

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.580.539 ◽

2012 ◽

Vol 580 ◽

pp. 539-543

Author(s):

Chao Hui Wang ◽

You Wang ◽

Zhao Yi Pan ◽

Xiao Hua Gu ◽

Sheng Xiao Li

Keyword(s):

Cast Iron ◽

Aspect Ratio ◽

Stress Field ◽

Wear Depth ◽

Cast Irons ◽

Cu Alloy ◽

Graphite Morphology ◽

Nano Additives ◽

Alloy Cast Iron ◽

Alloy Cast

The finite element method (FEM) was used to simulate the sliding wear progress. The stress field and strain field of Cr-Mo-Cu alloy cast iron with nano-additives under wear abrasion were analyzed through experiment and numerical investigation in this paper. And then the wear depth was got by calculation for different alloy cast irons by taking graphite morphology into account. The graphite morphology was changed by addition of nano-additives, with the aspect ratio of graphite was transformed from 2 to 10, three kinds of graphite aspect ratio prepared including 2, 5 and 10.

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NI-RESIST

Alloy Digest ◽

10.31399/asm.ad.ci0011 ◽

1955 ◽

Vol 4 (7) ◽

Keyword(s):

Fracture Toughness ◽

Copper Content ◽

Cast Irons ◽

International Nickel Company ◽

Nickel Chromium ◽

Temperature Performance ◽

High Nickel ◽

Different Types ◽

Resistance To Wear ◽

Alloy Cast

Abstract NI-RESIST high nickel alloy cast irons have high resistance to wear, corrosion, and heat. They are furnished in seven different types varying primarily in nickel, chromium, and copper content. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive strength as well as fracture toughness and fatigue. It also includes information on high temperature performance and corrosion resistance as well as machining and joining. Filing Code: CI-11. Producer or source: International Nickel Company Inc..

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Cavitation erosion of heat-treated low alloy cast irons

Wear ◽

10.1016/0043-1648(90)90023-4 ◽

1990 ◽

Vol 137 (1) ◽

pp. 143-146 ◽

Cited By ~ 6

Author(s):

W.J. Tomlinson ◽

M.G. Talks

Keyword(s):

Cavitation Erosion ◽

Cast Irons ◽

Heat Treated ◽

Alloy Cast

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Research on Wear Performance of Nano-Additives Cr-Mo-Cu Alloy Cast Iron

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.580.485 ◽

2012 ◽

Vol 580 ◽

pp. 485-488

Author(s):

Chao Hui Wang ◽

Zhuan Fang Zhang ◽

You Wang ◽

Xiao Hua Gu ◽

Sheng Xiao Li

Keyword(s):

Cast Iron ◽

Strain Field ◽

Stress And Strain ◽

Cast Irons ◽

Wear Performance ◽

Cu Alloy ◽

Shear Stress And Strain ◽

Nano Additives ◽

Alloy Cast Iron ◽

Alloy Cast

In this paper Cr-Mo-Cu alloy cast irons were prepared by adding nano-additives. The finite element of ANSYS was used to simulate the change of the stress field and strain field of Cr-Mo-Cu alloy cast iron with nano-additives under wear abrasion. The changes of shear stress and strain are also discussed in this paper.

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