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OPTIMASI TEMPERATUR INTERFACE PADA PELAPISAN ULANG NI-HARD 1 DENGAN METODE GRAVITY CASTING Hanaldi, Kus; Purwadi, Wiwik; Kurnia Nurzaenal, Friya
Jurnal Teknologi Terapan Vol 3, No 1 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Grinding roll is one type of product made by the method of bimetallic casting. The product consists of two types of material that held together with foundry process. Grinding roll has two kinds of different material properties, outer grinding roll should be hard because it would destroy the mine or rock with material hardness at 9.3 mohs. The inside of the grinding roll should be soft, for machining process , and also for dampen the vibration caused by the grinding process. In use, the outer layer of the grinding roll will be thinned. The purpose of this study to fix the beam Ni-Hard 1 by coating using a material Ni-Hard 1 with variable temperature liquid interface. The methodology of this study is the beam of Ni-Hard 1 to be coated (called die blank) is heated by the flow of liquid metal Ni Hard1. This process is called flushing. The volume of flushing fluid is accommodated at the disposal basin. The design, which has been determined, simulated using software (solidcast 8.2) to determine the temperature of interface, and then carried out experiments in the workshop.The bond was analyzed by testing the microstructure, composition, and hardness. Results from this study is the technology to coat Ni-Hard 1 with material Ni-Hard 1 that bonding occurs at the surface. Results of research showed that surface fixing with gravity casting method can be applied at Grinding roll, with the temperature variable interface that must be achieved between 887 ° C – 1198 ° C, flushing time between 10-20 seconds, with a pouring temperature of 1438 ° C – 1468 ° C.

Pengaruh Kecepatan Putar Terhadap Hasil Coran pada Metode Pengecoran Sentrifugal dalam Pembuatan Produk Pisau Pakan Ternak dengan Material Ni-Hard1 Kusnowo, Roni; Hanaldi, Kus
Manutech : Jurnal Teknologi Manufaktur Vol. 11 No. 01 (2019): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Animal feed knife is a tool that serves to cut and chop animal feed consisting of grass as the main ingredient with additives such as bran, herbs, centrate, cassava, tofu pulp and others. Therefore, as a cutting tool must have the properties of friction resistance, impact resistance, and have good sharpness, so that the material chosen is Ni-Hard 1. The use of centrifugal casting method was chosen because it has the advantage of being able to make castings with relatively thin thickness this is due to the influence of the centrifugal force on the distribution of metal liquids throughout the cavity in the mold. Case study in this study is the use of centrifugal casting methods as an alternative to gravity casting methods to overcome defects of misruns. This research was conducted to investigate the effect of speed on the formation of castings products. The method that was carried out began with a literature study on centrifugal casting, and continued by determining the material, the temperature of the cast is in the range 1250ºC - 1300ºC, and the type of mold. The next step is to do work drawings, pattern making, mold making, casting processes, fettling processes, and analysis. With variations in speed of 200 rpm, 300 rpm and 400 rpm, it can be seen the optimal speed for making this product. The results of this study obtained optimal speed at a speed of 300 rpm to make good quality of animal feed knife products.

Pengaruh Nikel (Ni) dan Silikon (Si) Terhadap Struktur Mikro, Sifat Kekerasan, Dan Ketahanan Erosi Dari Paduan Aluminium-Nikel-Silikon (Al-Ni-Si) Budi Hartono Setiamarga; Kus Hanaldi; Rahmatul Aulia Jorji
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Paduan Aluminium sering digunakan untuk berbagai keperluan teknik karena sifatnya yang ringan dan tahan korosi[1]. Meskipun demikian, ketahanan erosinya masih perlu ditingkatkan bila hendak diaplikasikan untuk komponen seperti propeler. Pada penelitian ini empat jenis paduan Aluminium-Nikel-Silikon dengan kandungan Al, Ni, dan Si yang berbeda, dileburkan dengan menggunakan tungku listrik. Uji erosive wear dilakukan terhadap keempat jenis paduan Al-Ni-Si dengan menggunakan peralatan Air Jet Erosion dengan serbuk Alumina sebagai partikel abrasifnya. Uji XRD, EDS, metalografi optik, dan uji keras dilakukan untuk memahami sifat erosive wear-nya. Hasil pengujian menunjukkan bahwa senyawa Al3Ni yang keras dan getas akan bertambah banyak dan bertambah besar seiring dengan penambahan komposisi nikel. Kekerasan paduan Al-Ni-Si terbukti meningkat seiring dengan bertambahnya komposisi nikel. Meskipun demikian, kenaikan kekerasan ini justru menurunkan laju erosinya akibat makin mudahnya senyawa Al3Ni yang terlepas. Penurunan kandungan Silikon akan merubah morfologi fasa silikon dari bentuk serpihan pelat menjadi bentuk serat halus. Penurunan jumlah fasa silikon dapat menurunkan laju erosinya walaupun tidak besar.

OPTIMASI TEMPERATUR INTERFACE PADA PELAPISAN ULANG NI-HARD 1 DENGAN METODE GRAVITY CASTING Kus Hanaldi; Wiwik Purwadi; Friya Kurnia Nurzaenal
Jurnal Teknologi Terapan Vol 3, No 1 (2017): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Grinding roll is one type of product made by the method of bimetallic casting. The product consists of two types of material that held together with foundry process. Grinding roll has two kinds of different material properties, outer grinding roll should be hard because it would destroy the mine or rock with material hardness at 9.3 mohs. The inside of the grinding roll should be soft, for machining process , and also for dampen the vibration caused by the grinding process. In use, the outer layer of the grinding roll will be thinned. The purpose of this study to fix the beam Ni-Hard 1 by coating using a material Ni-Hard 1 with variable temperature liquid interface. The methodology of this study is the beam of Ni-Hard 1 to be coated (called die blank) is heated by the flow of liquid metal Ni Hard1. This process is called flushing. The volume of flushing fluid is accommodated at the disposal basin. The design, which has been determined, simulated using software (solidcast 8.2) to determine the temperature of interface, and then carried out experiments in the workshop.The bond was analyzed by testing the microstructure, composition, and hardness. Results from this study is the technology to coat Ni-Hard 1 with material Ni-Hard 1 that bonding occurs at the surface. Results of research showed that surface fixing with gravity casting method can be applied at Grinding roll, with the temperature variable interface that must be achieved between 887 ° C – 1198 ° C, flushing time between 10-20 seconds, with a pouring temperature of 1438 ° C – 1468 ° C.

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