On the Conversion and Rifling of Cast-Iron Ordnance, and on Chilled White Iron Projectiles

ABSTRACTMinor additions (0.05-0.2 wt.%) of sodium chloride, hexachloroethane and elemental sulphur to commercial white iron melts have been found to enhance the kinetics of first stage graphitisation during subsequent annealing of white iron samples. The optimum dose of sodium chloride and hexachloroethane addition is around 0.1%. Yield strength and ductility of annealed test bars treated with NaCl or C2Cl6 compare favourably with those of untreated test bars. Sulphur treatment causes slight deterioration in mechanical properties. Fully grown nodules in both treated and untreated samples appear porous under SEM. Possible mechanisms of acceleration of graphitisation in the treated samples have been suggested.

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Fabrication of High Chromium White Iron Surface Layers on Ductile Cast Iron Substrate by Laser Surface Alloying

Strojniški vestnik – Journal of Mechanical Engineering ◽

10.5545/sv-jme.2017.4379 ◽

2017 ◽

Vol 63 (12) ◽

Cited By ~ 5

Keyword(s):

Cast Iron ◽

Ductile Cast Iron ◽

Laser Surface ◽

Iron Surface ◽

White Iron ◽

Surface Alloying ◽

Surface Layers ◽

Laser Surface Alloying ◽

High Chromium

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NI-HARD

Alloy Digest ◽

10.31399/asm.ad.ci0009 ◽

1954 ◽

Vol 3 (11) ◽

Keyword(s):

Cast Iron ◽

Physical Properties ◽

White Cast Iron ◽

Nickel Content ◽

High Hardness ◽

Heat Treating ◽

White Iron ◽

Grey Cast ◽

Carbide Matrix ◽

Heavy Castings

Abstract NI-HARD is a white cast iron alloyed with nickel and chromium to give high hardness and outstanding resistance to abrasion. The structure consists of hard carbide matrix rendered martensitic by the nickel content. The wearing faces of heavy castings may be chilled, thus giving a white iron face, backed by grey cast iron where the metal has cooled more slowly. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: CI-9. Producer or source: Allen-Sherman-Hoff Pump Company.

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Effect of Temperature and Inoculation on Structure Property of Chilled Cast Iron Camshaft

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.154 ◽

2010 ◽

Vol 152-153 ◽

pp. 154-158

Author(s):

Guo Fa Mi ◽

Bin Feng He ◽

You Chao Wang

Keyword(s):

Cast Iron ◽

Structural Properties ◽

Molten Metal ◽

Production Control ◽

Effect Of Temperature ◽

White Iron ◽

Structure Property ◽

Pouring Temperature ◽

Chilled Cast Iron ◽

Cooling Velocity

The structural properties of camshaft were affected by many factors such as pouring temperature and inoculation which were studied in this paper. The results showed that with the increase of the pouring temperature, the chilled depth and hardness decrease. However, at a very low pouring temperature, the cooling velocity was fast and the formation of dissociative carbonide precipitate was easily; even the whole cam may become white iron, so the optimal pouring temperature is 1375 -1450 . Moreover, when the bearing location of camshaft is less than 15% carbonide, reducing the inoculants contents may cause the graphite amount decreasing, and the improvement of chilled hardness. While, reducing the amount of inoculants can improve the chilled sensibility of molten metal, which is favorable for production control. The experimental results showed that the optimum adding content is no more than 0.3% Si-Ba.

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ANALISIS MATEMATIS PENGELASAN GREY CAST IRON MENGGUNAKAN PROSES GTAW DENGAN DAN TANPA PREHEAT

Jurnal Technopreneur (JTech) ◽

10.30869/jtech.v9i1.698 ◽

2021 ◽

Vol 9 (1) ◽

pp. 14-21

Author(s):

Doty Dewi Risanti

Keyword(s):

Cast Iron ◽

Steady State ◽

Arc Welding ◽

Travel Speed ◽

Grey Cast Iron ◽

Carbon Equivalent ◽

Quasi Steady State ◽

White Iron ◽

Gas Tungsten Arc ◽

Grey Cast

Pemberian pemanasan awal pada proses pengelasan memberikan efek pengurangan tegangan, distorsi, retakan dan kekerasan pada daerah Heat Affected Zone (HAZ) dengan memperlambat laju pendinginan. Distribusi temperatur saat pengelasan didekati dengan menggunakan persamaan analitik Rosenthal pada logam grey cast iron. Grey cast iron termasuk sulit untuk dilas dan memerlukan perlakuan khusus. Pada penelitian ini, perhitungan distribusi temperatur dan laju pendinginan dibandingkan dengan struktur mikro dan kekerasan untuk grey cast iron yang dilas dengan menggunakan Gas Tungsten Arc Welding (GTAW). Persamaan Rosenthal dengan solusi Bessel hanya cocok untuk distribusi temperatur pada daerah lelehan, sedangkan solusi quasi steady state dapat digunakan untuk prediksi distribusi temperatur arah lateral dan transversal pada logam lasan. Preheating pada suhu 315 berpengaruh pada lebar HAZ yang dihasilkan menurut persamaan eksponensial terhadap travel speed, memperlambat laju pendinginan dan menurunkan kekerasan karena berkurangnya carbon equivalent (CE). Struktur mikro HAZ pada grey cast iron yang diberi preheating menunjukkan dominasi martensit nikel dan eutektik ledeburit, sedangkan tanpa preheating menghasilkan struktur mikro didominasi oleh eutektik ledeburit dan besi karbida dalam white iron.

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