scholarly journals ANALISIS KEKERASAN, STRUKTUR MIKRO MATERIAL RING PISTON 5MX-E160-10 DENGAN PROSES HEAT TREATMENT

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Sri Widodo ◽  
Kun Suharno ◽  
Hasyim Tri Gustomo ◽  
Fuad Hilmy
Keyword(s):  
Heat Treatment ◽  
Time Series ◽  
Piston Ring ◽  
Holding Time ◽  
Raw Material ◽  
Test Results ◽  
Quenching Media ◽  
Hardness Values

Now, many of piston ring parts have been on the market. The products are often encountered are the 5MX-E160-10 series piston ring and the SLW-E1603-20 series piston ring which have different qualities. In this study, the hardness of the two piston ring products was analyzed by heat treatment. The heat holding time was varied 15 minutes, 30 minutes and 45 minutes at 8000C and the quenching media of SAE 40 oil. The results of the hardness of the 5MX-E160-10 series raw material were 105.97 HRB and the highest hardness value after treatment decreased 34.02% were 71.95 HRB. While the hardness value of the SLW-E160-20 series raw material were 90.26 HRB and after the heat treatment has decreased by 19%, were 71.26 HRB. The best microstructure test results were found at the 30 minute holding time series 5MX-E160-10 with a temperature of 8000C and the quenching media of SAE 40 oil. In addition, the results showed that the longer holding time in the SLW-E1603-20 series resulted in decreased hardness values.

Effect of Borax on Lightweight Material from Cullet and Fly Ash

2016 ◽  
Vol 690 ◽  
pp. 109-113 ◽  
Author(s):  
Sutthima Sriprasertsuk ◽  
Phatthiya Suwannason ◽  
Wanna T. Saengchantara
Keyword(s):  
Thermal Conductivity ◽  
Heat Treatment ◽  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Silicate ◽  
Raw Materials ◽  
Raw Material ◽  
Test Results ◽  
Heat Process ◽  
Lightweight Material

This work investigated the recycling of fly ash waste and cullet as the raw materials for lightweight bodies produced by heat treatment and using sodium silicate as the binder. Borax was mixed with fly ash and cullet, and put into the block in dimension 10x10x2 cm3. The lightweight materials thus produced were then sintered at temperature of 800 °C. Density, compressive strength and thermal conductivity were determined. Borax showed a positive sintering effect on the porosity of lightweight material during the heat process. The compressive strength of lightweight material diminished with the reduction of density and thermal conductivity. Lightweight material manufactured with borax showed the lower density and thermal conductivity accompanied by the higher compressive strength. The test results indicated that using fly ash and cullet as the raw material with borax could obtain the lightweight material, thus enhancing the possibility of its reuse in a sustainable way.

scholarly journals PENGARUH VARIASI QUENCHING BERTINGKAT PADA BAJA AISI-1045 DENGAN MENGGUNAKAN MEDIA PENDINGIN OLI SAE-20W DAN AIR TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO

2019 ◽  
Vol 16 (2) ◽  
pp. 156
Author(s):  
Syaharuddin Rasyid ◽  
Ahmad Ahmad ◽  
Muh Sulfikar Ramadhani ◽  
Istan Herdin
Keyword(s):  
Heat Treatment ◽  
Holding Time ◽  
Raw Material ◽  
Aisi 1045

Penelitian ini bertujuan untuk mengetahui pengaruh variasi quenching bertingkat dengan menggunakan media pendingin oli dan air pada baja AISI 1045 terhadap sifat mekanik dan struktur mikro. Sifat mekanis yang dianalisa meliputi uji kekerasan, uji impak dan pengamatan struktur mikro. Metode yang digunakan yaitu diawali dengan proses Perlakuan Panas (Heat Treatment) pada temperatur 850º dengan waktu Penahanan (Holding Time) selama 4 jam. Setelah itu dilanjutkan Pendinginan Cepat (Quenching) dengan volume air dan oli yang divariasikan untuk setiap spesimen. Nilai kekerasan tertinggi didapatkan pada media pendingin air saja tanpa campuran oli sebesar 71.74 HRC atau meningkat sebesar 796.75% atau delapan kali lipat dari kekerasan raw material sedangkan kekerasan terendah dari variasi oli dan air tejadi pada variasi 50:50 (%) sebesar 46,38 HRC atau meningkat sebesar 475% atau hampir lima kali lipat. Kekuatan impak baja AISI-1045 cenderung mengalami peningkatan kekuatan pada media pendinginan air + oli diatas 10% dibandingkan raw material, ini menunjukkan bahwa semakin tinggi jumlah volume oli terhadap air sebagai media quenching, maka akan meningkatkan keuletan baja namun menurunkan kekerasan baja. Jenis variable pendinginan yang menghasilkan baja yang tangguh (keras dan ulet) adalah pada variable quenching air 80:20 (%) oli dan air 70:30 (%) oli. Namun, berdasakan pertemuan dua garis linear pada grafik perbandingan nilai kekerasan dan impak, ditemukan perbandingan variasi pendinginan yang paling optimal yakni pada variasi air 68% dan oli 32%.

scholarly journals Pengaruh Proses Heat Treatment Pada Kekerasan Material Special K (K100)

2013 ◽  
Vol 2 (1) ◽  
pp. 37
Author(s):  
Hera Setiawan
Keyword(s):  
Heat Treatment ◽  
Holding Time ◽  
Raw Material

Abstrak Penelitian ini bertujuan untuk mempelajari pengaruh proses perlakuan panas (heat treatment) terhadap kekerasan material special K (K 100). Material Special K (K100) dengan ukuran 25 mm x 20 mm x 50 mm dilakukan proses heat treatment sesuai dengan instruction for treatment BOHLER STEEL MANUAL, yaitu hardening dengan temperatur 950C dan quenching dengan media pendingin oli, kemudian dilanjutkan tempering dengan temperatur 200 C dan holding time 60 menit. Kekerasan sebelum dan sesudah proses heat treatment diperiksa dan dibandingkan. Hasilnya menunjukkan bahwa harga kekerasan rata-rata raw material Special K (K100) adalah 20 HRC, setelah proses hardening dan quenching 64 HRC, dan setelah tempering adalah 62 HRC. Kata kunci : heat treatment, special K (K100), BOHLER, kekerasan.

scholarly journals PENGARUH PREHEAT DAN TEMPERING TERHADAP KEKERASAN DAN STRUKTUR MIKRO HASIL PENGELASAN BAJA JIS SS 400

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Saiful Askar ◽  
S. Sinarep ◽  
Nasmi Herlina Sari
Keyword(s):  
Arc Welding ◽  
Brinell Hardness ◽  
Steel Structures ◽  
Raw Material ◽  
Test Results ◽  
Shielded Metal Arc Welding ◽  
Electrode Diameter ◽  
Root Angle ◽  
Metal Arc Welding ◽  
Hardness Values

JIS steel SS 400 is one of the most common types of steel used for hot rolling steel structures general. This steel is excellented to the weldability and machinability properties. This study aimed to determine the effect of heat treatment with preheating without tempering (PTT), with preheating and tempering (PT), without preheating and without tempering (TPTT), and  without preheating tempering (TPT). The test results are then compared with the raw material specimens. Method of forming specimens using welding SMAW (Shielded Metal Arc Welding) DC reverse polarity using E7018 type electrode diameter of 4 mm. Type of seam used is V open seam with slit width and height of 2 mm and the width of the root angle 70o. This studied used a low alloy steel (JIS steel SS 400) which contain high levels of 0.20% C, maximum 0.005% S, maximum 0.005% P with repetitions each variation three times. Tests conducted it has testing the tensile strength, brinell hardness testing, and microstructure photo shoot. Value of the brinell hardness of welded joints highest in the tempering specimens without preheating, amounting with  163,911 HB hardness value. The structure of cementite and pearlite formed. While the lowest hardness values of specimens owned by raw material is 120,498 HB hardness values that form the microstructure of pearlite and ferrite. 

scholarly journals NILAI KEKERASAN PASCA QUENCHING MEDIA CLAY PADA LAPISAN LAS DI ATAS MILD STEEL

2019 ◽  
Vol 6 (1) ◽  
pp. 6-8
Author(s):  
Sopiyan ◽  
Syamsuir
Keyword(s):  
Heat Treatment ◽  
Mild Steel ◽  
Holding Time ◽  
Quenching Media

ABSTRAK Proses hardfacing menggunakan jenis SMAW, dengan polaritas DC+, arus yang digunakan 130A, elektroda HV 350. Setelah spesimen di las (satu lapis), kemudian langsung dicelup ke dalam air. Setelah mendingin, spesimen grinding, amplas kemudian dilakukan heat treatment 1000 oC holding time 10 menit dan quenching dengan media clay. Spesimen yang telah di quenching sebelumnya dipoles dan etsa dengan nital lalu dilakukan pengujian kekerasan dan mikrostruktrur. Nilai kekerasan yang didapatkan dari sebelum dan sesudah quenching dengan media clay adalah sebesar 250 dan 296,93 HV   Kata kunci: Hardfacing, SMAW, Clay, Struktur Mikro dan Kekerasan

scholarly journals Pengaruh Variasi Temperatur Hardening dan Tempering Paduan AlMgSi-Fe12% Hasil Pengecoran terhadap Kekerasan

2018 ◽  
Vol 2 (1) ◽  
pp. 26
Author(s):  
Sumpena Sumpena ◽  
Wardoyo Wardoyo
Keyword(s):  
Heat Treatment ◽  
Test Specimen ◽  
Treatment Process ◽  
Material Testing ◽  
Test Method ◽  
Raw Material ◽  
Test Results ◽  
Hardness Testing ◽  
Testing Method ◽  
Hardening Heat Treatment

<p><em>The purpose of this research is to know the effect of Heat Treatment Hardening-Tempering Alloy AlMgSi–Fe12% foundry result to hardness and toughness. The test was carried out on raw material and material test specimen after obtaining Hardening heat treatment at 600</em>℃ <em>and quenching with SAE 20 oil medium. While Tempering variation at temperature 200</em>℃<em>, temperature 250</em>℃ <em>and temperature 300</em>℃ <em>with detention time for 15 min at each temperature, each heat treatment. Hardness testing method is done by standard micro Vickers test method with 100 gf loading. The result of raw material testing for hardness value is 60,92 VHN. Test results after heat treatment process at temperature 200</em>℃ <em>cause hardness value increased by 63,50 VHN. At temperature 250</em>℃ <em>cause hardness value decreased to 59,94 VHN. At temperature 300</em>℃ <em>cause hardness value increase to 76,98 VHN </em></p>

scholarly journals Hardness Optimization of Heat Treatment Process of Bucket Teeth Excavator

2018 ◽  
Vol 4 (2) ◽  
pp. 294 ◽  
Author(s):  
Sumar Hadi Suryo ◽  
Susilo Adi Widyanto ◽  
Paryanto Paryanto ◽  
Aly Syariati Mansuri
Keyword(s):  
Heat Treatment ◽  
Carbon Steel ◽  
Heating Temperature ◽  
Salt Water ◽  
Optimization Method ◽  
Holding Time ◽  
Tempering Temperature ◽  
Mild Carbon Steel ◽  
Quenching Media ◽  
Heavy Equipment

Excavator is heavy equipment that usually used in construction and mining works. Bucket teeth which are located in the tip of bucket excavator are used for digging works. They are easily damaged by direct contact with the media. One of the material used in bucket teeth excavator is mild carbon steel that has carbon content between 0.33%-0.5%. However, the hardness value of this material is not yet meets the standard of bucket teeth excavator so the optimum hardness value based on its heat treatment should be known. Besides that, its tensile, impact strength, and micro structure in optimum condition will also know. Optimization method was done through Taguchi experimental design with L9 orthogonal and ANOVA (Analysis of Variance). Factors or parameters in this research were heating temperature, holding time, quenching media, and tempering temperature. In this experiment, nine specimens of mild carbon steel were tested by different heating temperatures (850oC, 875oC, 900oC), different holding times (60, 90, and 120 minutes), different quenching medias (oil, water, and salt water), and different tempering temperatures (250oC, 450oC, 650oC). Calculation of Taguchi method and confirmation experiment showed that the optimum parameters of hardness are 875oC heating temperature, 60 minutes holding time, water quenching media, and 250oC tempering temperature. Meanwhile, ANOVA test showed a result that the four factors had an effect on the bucket teeth excavator hardness.

scholarly journals Pengaruh Variasi Temperatur Quenching pada Aluminium Paduan AlMgSi-Fe12% terhadap Keausan

2018 ◽  
Vol 2 (1) ◽  
pp. 33
Author(s):  
Wardoyo Wardoyo ◽  
Sumpena Sumpena
Keyword(s):  
Heat Treatment ◽  
High Speed ◽  
Raw Materials ◽  
Testing Machine ◽  
Treatment Temperature ◽  
Raw Material ◽  
Test Material ◽  
Test Results ◽  
Temperature Heat ◽  
Temperature Heat Treatment

<em>The purpose of this research </em><em>is to determine the effect of heat treatment hardening of Al</em><em>Mg</em><em>Si</em><em>-</em><em>Fe12% casting aluminium alloys</em><em> </em><em>on wear. The tests were carried out on specimens of raw materials and heat-treated specimens with variations of temperature used were 550 <sup>o</sup>C, 575 <sup>o</sup>C, 600 <sup>o</sup>C, and 625 <sup>o</sup>C, and used 15 minutes of holding time in each heat treatment, then quenching in SAE 20 oil. The method used for wear-tested was high speed ogoshi universal testing machine wear.</em><em> The result had shown on </em><em>raw material a specific wear rate was 2.256102E-07 mm<sup>2</sup>/kg. Test results on the </em><em>specimens</em><em> that have</em><em> received heat treatment hardening temperature 550 <sup>o</sup>C increased the wear value decreased to 1.7471E-07 mm<sup>2</sup>/kg. In materials with temperature heat treatment, 575 <sup>o</sup>C causes wear values were increased when compared with raw material, </em><em>respectively, 2,83739E-07 mm<sup>2</sup>/kg. In materials with temperature heat treatment 600 <sup>o</sup>C also causes wear values were increased when compared with raw material, respectively, 2,65105E-07 mm<sup>2</sup>/kg. Test results on the test material that ha</em><em>s</em><em> received heat treatment temperature 625 <sup>o</sup>C increased the wear value decreased to 2.16777E-07 mm<sup>2</sup>/kg.</em>

Experimental Study on Carbonization of Low-Rank Pulverized Coal with High Temperature Heat Pipe

2014 ◽  
Vol 953-954 ◽  
pp. 1035-1039
Author(s):  
Li Qun Wang ◽  
Zhong Bo Yi ◽  
Zhong Xiang Wei
Keyword(s):  
High Temperature ◽  
Heat Pipe ◽  
Pulverized Coal ◽  
Holding Time ◽  
Raw Material ◽  
Low Rank ◽  
Experimental Result ◽  
Operating Characteristics ◽  
Temperature Heat ◽  
High Temperature Heat Pipe

Aimed at improving the utilization of pulverized coal, high-temperature heat pipe technology was introduced into lignite carbonization.Under the design of power of 10kw semi-industrial pulverized coal carbonization test equipment, Fugu lignite coal as raw material to investigate the operating characteristics of the device and carbonization characteristics. Experimental result shows that the high temperature heat pipes heat steadily and meet the temperature requirement of low-temperature carbonization. With the extension of the holding time, the semi-coke fixed carbon content increasing, but volatile matter vice versa, however, holding time above 60 minutes, the effect of carbonization is not obvious, and the best carbonization time is 30 ~ 60 minutes. The length of the holding time has little effect on gas composition, the content of H2 and CH4 are relatively higher than the rest gas, (H2 + CH4) gas accounted for 70% of the total, the heating value remains at 18.76 ~ 19.22MJ/m3, belongs to medium-high value gas, could provide for industrial and civilian use.

Dimensional Stability of Poplar Wood after Densification Combined with Heat Treatment

2012 ◽  
Vol 152-154 ◽  
pp. 112-116 ◽  
Author(s):  
Jia Bin Cai ◽  
Tao Ding ◽  
Liu Yang
Keyword(s):  
Heat Treatment ◽  
Dimensional Stability ◽  
Hybrid Poplar ◽  
Treatment Temperature ◽  
Thermal Modification ◽  
Holding Time ◽  
Poplar Wood ◽  
Compression Set ◽  
Densification Temperature

Hybrid poplar boards were subjected to thermo-mechanical densification combined with heat treatment. Hydroscopicity and hygroscopicity of the treated samples were measured. The results showed that dimensional stability of the samples was influenced by compression set significantly. The higher the compression set, the greater the swelling of the samples. On the contrary, the influence of densification temperature and duration was not significant. Thermal modification significantly reduced hydroscopicity and hygroscopicity of the samples. Both higher treatment temperature and longer holding time resulted in better dimensional stability.

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