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How to Prevent Reticulated Ferrite and Reticulated Cementite
Hypereutectoid carbon steel, high-carbon alloy tool steel heating temperature is too high during annealing heat treatment, cooling rate is too slow, will precipitate network cementite (carbide) along the austenite grain boundary. The initial forging temperature of the blank is too high, and the c...
Material Selection and Process Analysis of Automobile and Tractor Gear Parts
Automobile and tractor gears are mainly divided into transmissions and differentials. In the transmission, the gear ratio of the engine, crankshaft and main shaft gear is changed; in the differential, the gear is used to increase the torsion torque and adjust the speed of the left and right wheel...
Introduction to The Phase Structure and Properties of Fe-Fe3C Alloy
Although industrial pure iron has better plasticity, but lower strength, it is rarely used to make mechanical parts, and iron-carbon alloys are commonly used. The phase structures in iron-carbon alloys are as follows. 1. Ferrite Pure iron has a body-centered cubic lattice below 912°C. The interst...
Work Location Arrangement For Heat Treatment of Workpieces
The processing of the parts is carried out along a certain process route, and the reasonable arrangement of the position of the heat treatment process is of great significance to ensure the quality of the parts and improve the cutting performance. According to the purpose of heat treatment and th...
Commonly Used Heat Treatment Methods For Ductile Iron
According to different heat treatment purposes, the commonly used heat treatment methods for ductile cast iron are as follows: 1. High Temperature Annealing and Low Temperature Annealing. The purpose of annealing is to obtain ferrite matrix ductile iron. After casting, different amounts of pearli...
Introduction of Commonly Used Alloy Quenched and Tempered Steel and Heat Treatment
Alloy quenched and tempered steel is often divided into three categories according to hardenability. 1. Low hardenability quenched and tempered steel. The critical hardening diameter of oil quenching is 20~40mm, and the strength after quenching and tempering is higher than that of carbon steel, g...
Vacuum Sintering of Stainless Steel Filter Element
The sintering and heat treatment process of the stainless steel filter element includes charging, vacuuming, degassing, heating, argon filling, heat preservation, cooling and discharging. The stainless steel filter element puts the blank into a tray or a data box for sintering. The pallet or data...
SiC Ceramic Sintering Method
1. Pressureless Sintering Sic pressureless sintering can be divided into solid phase sintering and liquid phase sintering. Solid-phase sintering was first invented by American scientist Prochaka in 1974. A small amount of P and C were added to sub-micron β-SiC to achieve pressureless sintering of...
Aging Annealing Process of Gray Cast Iron
During the cooling process of the casting, the different cooling speeds of various parts cause inconsistent shrinkage and form internal stress. This internal stress can be relieved by the deformation of the casting, but this process is generally slow. Therefore, castings need to be aging treatmen...
Material Selection and Heat Treatment Process of Taps and Dies For Tool Heat Treatment
Taps are tools for processing internal threads, and die are tools for processing external threads. When working, the shank and the core bear greater torsional stress, the tooth edge bears greater friction and wear, and the tooth edge bears a higher working temperature during high-speed cutting. T...