未分类

crack defects

Causes of crack defects in high manganese steel castings

未分类 / /

1. Chemical composition factors Influence of carbon content: If the carbon content is too high, greater thermal stress and structural stress will be generated during the solidification process of the casting. Because high-carbon high-manganese steel will undergo eutectoid transformation during solidification, the volume changes, which can easily lead to cracks. Influence of sulfur and phosphorus […]

Causes of crack defects in high manganese steel castings Leer más »

low-carbon steel castings

How to carburize low-carbon steel castings?

未分类 / /

What is the purpose of carburizing low-carbon steel castings? Improve surface hardness and wear resistance Low-carbon steel castings have low carbon content, insufficient surface hardness and wear resistance. Carburizing can significantly increase the carbon content on the surface of steel parts. After quenching and tempering, tempered martensite and carbides form on the surface. The hardness

How to carburize low-carbon steel castings? Leer más »

Sand Sticking Problem of Shell

Analysis and Improvement of Sand Sticking Problem of Shell

未分类 / /

For the sand sticking problem of clutch shell casting in the workshop, the possible causes of the problem were analyzed according to the production situation of the workshop. The cause-effect diagram of sand sticking problem of clutch shell casting was drawn by using quality analysis method. Measures were formulated and verified in production to determine

Analysis and Improvement of Sand Sticking Problem of Shell Leer más »

coated sand

Selection of raw materials for coated sand

未分类 / /

Coated sand is generally composed of aggregate, binder, curing agent, lubricant and special additives. 1. Aggregate Aggregate is the main component of coated sand. The requirements for aggregate are: high refractoriness, low volatile matter, relatively round particles and high strength. Natural scrubbed silica sand is generally used, mainly because of its abundant reserves, low price

Selection of raw materials for coated sand Leer más »

tempering

What effects does tempering have on different steel castings?

未分类 / /

Carbon steel castings Changes in mechanical properties: Tempering can eliminate quenching internal stress, reduce hardness and strength, and improve toughness and plasticity. For example, high carbon steel castings have high hardness and high brittleness after quenching. After low temperature tempering, they can greatly improve toughness while maintaining a certain hardness, so that they can meet

What effects does tempering have on different steel castings? Leer más »

Vermicular graphite cast iron

Vermicular graphite cast iron production process control

未分类 / /

Vermicular graphite cast iron has excellent performance such as high wear resistance, shock absorption and superior comprehensive heat fatigue resistance, and has been widely used in production. There are many factors that affect the production stability of cast vermicular graphite cast iron. To produce vermicular graphite cast iron stably and reliably, it is necessary to

Vermicular graphite cast iron production process control Leer más »