The effects of dephosphorization agents (SiO2, Na2CO3 and Al2O3) reduction time on phosphorus gasification during pre-reduction sintering were studied. results indicate that the rate apatite by carbothermal is 23%, adding SiO2 Al2O3 25%, optimal 36% Na2CO3. increased from 13% to 31% with 20 min 60 min. Thermodynamic analysis shows promotion effect stronger than Al2O3, thermodynamic conditions a...

Constituents of syngas, such as water, carbon monoxide and sulfides, can cause the degradation steel pipes they move through, leading to dusting corrosion. In spite considerable attention this process, many questions remain about its origin. We conduct reactive molecular dynamics simulations multi-grain iron systems exposed carburizing gas mixtures investigate effect water content on metal To s...

Penelitian ini dilatar belakangi dari satu pengamatan terhadap pengaruh variasi temperatur dan media pendingin kekerasan logam S45C. Perbedaan temperature dapat mempengaruhi menggunakan pengujian Harnes brinel test. Tujuan penelitian adalah mendapatkan optimal yang efektif agar didapatkan nilai tertinggi pada berupa matriks orthogonal L20 dengan tiga replikasi rancangan faktorial. Variabel beba...

This paper develops an optimized prediction method based on machine learning for optimal process parameters vacuum carburizing. The critical point is data expansion through a few and data, which leads to optimizing carburization in heat treatment. extends the volume by constructing neural network with augmentation presence of small samples. In this paper, database 213 expanded 2116800 predictio...

A surface hardening process by adding carbon to its without changing the core properties of material is called carburization process. This carried out at austenite temperature so that can diffuse into phase. only be done on low steels with a content below 0.25%. research uses ST 37 steel which 0.18%. type hardened carburizing 850°C for long lasting time 1 hour, then it under moderate cooling ou...

We analyzed the factors affecting gas carburizing microstructure of parts for constant velocity joints. Gas 0.15-0.20C1.13-1.14Cr chromium alloy steel used in automobile drive units is characterized by changing properties layer depth direction.
 The experimental conditions were set to enable field application. components specimen be carburization X-ray fluorescence. Changes mechanical carb...

Abstract In the present work, simulations of gas carburizing heat treatment heavy-duty gears on a coal-cutting machine fabricated by 18Cr2Ni4WA alloy steel were carried out using finite element method software. The physical property database was constructed in effects high temperature tempering process microstructure and hardness distributions simulated studied. distribution results obtained si...