The sensitivity of the microstructure and properties to the peak temperature in an ultrafast heat treated low carbon-steel

Nanostructure surface layer was fabricated on a low carbon steel cylinder specimen by means of circulation rolling plastic deformation (CRPD), and the effect of annealing temperature on microstructure and properties of surface nanocrystalline structure was studied. The microstructure of the surface layer on the samples was observed by transmission electron microscopy and the microhardness variation along the depth was measured on the cross-sectional samples by using microhardness instrument. After CRPD treatment for 250min, the average grain size was about 10nm in the top surface layer and increased with an increment of the distance from the top surface. The surface nanocrystallization samples were annealed at 200°C, 300, 400°C and 500°C for 30min respectively. The nanocrystallization grain of surface layer did not grow for samples after annealed at 200°C and 300°C. After surface nanocrystallization by CRPD treatment the microhadness of top surface obviously increase from 220HV0.1 to 520HV0.1.

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PROSES KARBURASI PADA BAJA KARBON RENDAH DENGAN MENGGUNAKAN KARBON ARANG KAYU BELIAN DAN ARANG KAYU AKASIA

INOVTEK POLBENG ◽

10.35314/ip.v9i2.1001 ◽

2019 ◽

Vol 9 (2) ◽

pp. 190

Author(s):

Muh Anhar

Keyword(s):

Calcium Carbonate ◽

Carbon Steel ◽

Hold Time ◽

Low Carbon Steel ◽

Wood Charcoal ◽

Test Results ◽

Low Carbon ◽

Heat Treated ◽

Type Of Failure ◽

Carburizing Process

Low carbon steel has extensive use in the construction field and is grouped into steel which can be processed with machinery (machinery steel). The prominent weakness of this material is the type of failure that often occurs in low carbon steel materials is wear, deformation, chopping, and breaking. The purpose of conducting this research is to find out the process of carburizing on (wood charcoal and acacia wood charcoal) on low carbon steel.This solid carburizing process uses a temperature of 900OC, with a hold time of 30 minutes. The material used is a mixture of wood charcoal with calcium carbonate and acacia wood charcoal with calcium carbonate. Tests carried out were rockwell hardness tests.The test results showed that the hardness of carbon steel which experienced carburizing treatment with acacia wood charcoal = 51.65 HRB. Hardness found in low carbon steel without treatment = 50.3 HRB. Hardness of wood charcoal = 50.6 HRB. Judging from the results above, the low carbon steel without treatment is smaller than carbon steel which is heat treated and carburized.

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Process Parameter Optimization in EDM using Heat Treated Al Tool and without Heat Treated Al Tool

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.e2738.039520 ◽

2020 ◽

Vol 9 (5) ◽

pp. 862-866

Keyword(s):

Carbon Steel ◽

Wear Rate ◽

Tool Wear ◽

Process Parameters ◽

Low Carbon Steel ◽

Low Carbon ◽

Tool Wear Rate ◽

Heat Treated ◽

Main Factors ◽

Pulse On Time

In this experimental work , we investigated optimization of process parameters in EDM using Taguchi method by taking Low carbon steel as work piece. Process parameters chosen were Pulse on-time (Ton), Flushing pressure(P) and Pulse Current(IP) . Here we have chosen L9 orthogonal array to study the effect of main factors and interaction between factors on the response variable i.e. Surface Roughness (SR), Material removal Rate (MRR) and Tool Wear Rate (TWR). The contribution of the main factors and interaction were determine here. The MR), TWR and surface integrity are some of the important performance attributes of EDM process. The objective of EDM is to get high MRR along with achieving reasonably good surface quality of machined component with reduced tool wear rate for Low carbon steel material.

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