1Cr18Ni9Ti Fracture and Related Cracks

In the metal heat treatment process, the effect of different temperature stages in the heat treatment process on the crack and fracture of 1Cr18Ni9Ti needs to be considered.

First, the temperature range of 1Cr18Ni9Ti when it is in the plastic state plays an important role. If the working temperature is too high or too low, it is easy to cause cracks and fractures. Generally speaking, the optimal temperature range for 1Cr18Ni9Ti is between 750°C and 800°C, and the heat treatment time should be controlled at more than 1 hour to avoid cracking and fracturing.

On the other hand, the cooling rate is also an important factor that needs to be taken into account when performing the heat treatment of 1Cr18Ni9Ti. If the cooling rate is too high or too low, the material is likely to form more cracks and fractures. In order to reduce the crack and fracture risk, it is recommended that the cooling rate of 1Cr18Ni9Ti is required to be between 4 and 6 °C per minute.

In addition, the difference of chemical composition components and mechanical properties of 1Cr18Ni9Ti affects the occurrence of crack and fracture. In order to control the chemical composition of alloy materials accurately, the materials shall be tested regularly during the heat treatment process to ensure that the chemical composition fits the demands. Optimal mechanical properties, such as tensile strength, yield strength and hardness, of 1Cr18Ni9Ti need to be maintained through proper heat treatment processes in order to reduce the risk of crack and fracture.

Finally, it should be noted that the size of the cracks and fractures caused by the heat treatment of 1Cr18Ni9Ti can be divided into two types, macro cracks and micro cracks. The macro cracks are those whose sizes are visible to the naked eye, while the micro cracks can only be measured using the microscope. Macro cracks are usually caused by overheating and quenching, while micro cracks caused by overheating and quenching are usually formed by insufficient cooling rate and improper heat treatment process. However, the size and shape of the cracks depends on the manufacturing process as well.

In conclusion, the crack and fracture of 1Cr18Ni9Ti refer to the physical characteristics of the materials caused by heat treatment. The occurrence of cracks and fractures can be avoided or controlled by proper control of the temperature range and the cooling rate, as well as the chemical composition and the mechanical properties of 1Cr18Ni9Ti.

The fracture of 0Cr18Ni9Ti is the process of atom rearrangement and bond breaking of a material occurring outside the elastic limit, usually accompanied by plastic deformation, thus changing the general shape of the material. The nature of the fracture can be roughly divided into brittle fracture and ductile fracture depending on the properties of the material. 0Cr18Ni9Ti belongs to the stainless steel series and has both good plasticity and toughness. Therefore, the fracture of 0Cr18Ni9Ti is mostly ductile fracture. Ductile fracture is characterized by the formation of bulge at the fracture, usually with traces of plastic deformation before fracture, and the fracture surface is dominated by beach sand structure. In addition, cracks are common features in the fracture of 0Cr18Ni9Ti. Under tension and shearing stress, voids are formed first when the material is strained. When the stress increases to a certain level, voids will coalesce or widen, forming a crack and eventually causing macroscopic damage. Most of the cracks on the surface of 0Cr18Ni9Ti are brittle fractures, and the surface of the crack is completely smooth, while the crack surface of ductile fracture is rough. The formation of crack will cause serious consequences, so the 0Cr18Ni9Ti should be strictly examined and inspected before use to ensure its quality.