【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20190627

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties. The chemical heat treatment methods widely used in industry all involve infiltrating certain elements into the surface layer of the workpiece, which is what is known as infiltration therapy. Based on the elements that are infiltrated, chemical heat treatment can be divided into three main categories: infiltration with non-metals, infiltration with metals, and co-infiltration of metals and non-metals. Metallic infiltration includes carburizing, nitriding, boriding, siliciding, sulfiding, as well as nitrocarburizing, carbonitriding, oxynitriding, sulfonitriding, borosiliciding, and sulfonitrocarbonitriding; non-metallic infiltration includes carburizing, nitriding, boriding, siliciding, and sulfiding. Co-infiltration of metals and non-metals involves aluminosiliciding, chromaluminosiliciding, aluminoboriding, titannoboriding, and titannitriding. In recent years, another major category of chemical heat treatment has been developed, which involves directly depositing compounds with certain special properties onto the surface of a metal substrate to form a coating layer; examples include vapor-deposited titanium nitride, titanium carbide, and similar materials. Chemical heat treatment is mainly used to improve the hardness, wear resistance, fatigue strength, or certain chemical and physical properties of a workpiece’s surface.

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties. The chemical heat treatment methods widely used in industry all involve infiltrating certain elements into the surface layer of the workpiece, which is what is known as infiltration therapy. Based on the elements that are infiltrated, chemical heat treatment can be divided into three main categories: infiltration with non-metals, infiltration with metals, and co-infiltration of metals and non-metals. Metallic infiltration includes carburizing, nitriding, boriding, siliciding, sulfiding, as well as nitrocarburizing, carbonitriding, oxynitriding, sulfonitriding, borosiliciding, and sulfonitrocarbonitriding; non-metallic infiltration includes carburizing, nitriding, boriding, siliciding, and sulfiding. Co-infiltration of metals and non-metals involves aluminosiliciding, chromaluminosiliciding, aluminoboriding, titannoboriding, and titannitriding. In recent years, another major category of chemical heat treatment has been developed, which involves directly depositing compounds with certain special properties onto the surface of a metal substrate to form a coating layer; examples include vapor-deposited titanium nitride, titanium carbide, and similar materials. Chemical heat treatment is mainly used to improve the hardness, wear resistance, fatigue strength, or certain chemical and physical properties of a workpiece’s surface.

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties. The chemical heat treatment methods widely used in industry all involve infiltrating certain elements into the surface layer of the workpiece, which is what is known as infiltration therapy. Based on the elements that are infiltrated, chemical heat treatment can be divided into three main categories: infiltration with non-metals, infiltration with metals, and co-infiltration of metals and non-metals. Metallic infiltration includes carburizing, nitriding, boriding, siliciding, sulfiding, as well as nitrocarburizing, carbonitriding, oxynitriding, sulfonitriding, borosiliciding, and sulfonitrocarbonitriding; non-metallic infiltration includes carburizing, nitriding, boriding, siliciding, and sulfiding. Co-infiltration of metals and non-metals involves aluminosiliciding, chromaluminosiliciding, aluminoboriding, titannoboriding, and titannitriding. In recent years, another major category of chemical heat treatment has been developed, which involves directly depositing compounds with certain special properties onto the surface of a metal substrate to form a coating layer; examples include vapor-deposited titanium nitride, titanium carbide, and similar materials. Chemical heat treatment is mainly used to improve the hardness, wear resistance, fatigue strength, or certain chemical and physical properties of a workpiece’s surface.

It generally refers to carburizing, nitriding, and carbonitriding. It consists of medium decomposition, strong infiltration, diffusion, and post-treatment processes

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties. The chemical heat treatment methods widely used in industry all involve infiltrating certain elements into the surface layer of the workpiece, which is what is known as infiltration therapy. Based on the elements that are infiltrated, chemical heat treatment can be divided into three main categories: infiltration with non-metals, infiltration with metals, and co-infiltration of metals and non-metals. Metallic infiltration includes carburizing, nitriding, boriding, siliciding, sulfiding, as well as nitrocarburizing, carbonitriding, oxynitriding, sulfonitriding, borosiliciding, and sulfonitrocarbonitriding; non-metallic infiltration includes carburizing, nitriding, boriding, siliciding, and sulfiding. Co-infiltration of metals and non-metals involves aluminosiliciding, chromaluminosiliciding, aluminoboriding, titannoboriding, and titannitriding. In recent years, another major category of chemical heat treatment has been developed, which involves directly depositing compounds with certain special properties onto the surface of a metal substrate to form a coating layer; examples include vapor-deposited titanium nitride, titanium carbide, and similar materials. Chemical heat treatment is mainly used to improve the hardness, wear resistance, fatigue strength, or certain chemical and physical properties of a workpiece’s surface.

A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties. The chemical heat treatment methods widely used in industry all involve infiltrating certain elements into the surface layer of the workpiece, which is what is known as infiltration therapy. Based on the elements that are infiltrated, chemical heat treatment can be divided into three main categories: infiltration with non-metals, infiltration with metals, and co-infiltration of metals and non-metals. Metallic infiltration includes carburizing, nitriding, boriding, siliciding, sulfiding, as well as nitrocarburizing, carbonitriding, oxynitriding, sulfonitriding, borosiliciding, and sulfonitrocarbonitriding; non-metallic infiltration includes carburizing, nitriding, boriding, siliciding, and sulfiding. Co-infiltration of metals and non-metals involves aluminosiliciding, chromaluminosiliciding, aluminoboriding, titannoboriding, and titannitriding. In recent years, another major category of chemical heat treatment has been developed, which involves directly depositing compounds with certain special properties onto the surface of a metal substrate to form a coating layer; examples include vapor-deposited titanium nitride, titanium carbide, and similar materials. Chemical heat treatment is mainly used to improve the hardness, wear resistance, fatigue strength, or certain chemical and physical properties of a workpiece’s surface.

Thermo-chemical treatment, also known as chemical heat treatment. A heat treatment process in which a steel or alloy workpiece is placed in an appropriate medium and heated while held at that temperature, allowing one or several elements to penetrate its surface layer in order to modify its chemical composition and structure and thereby achieve the desired properties.

A metal heat treatment process that utilizes chemical reactions, and sometimes physical methods as well, to modify the chemical composition and microstructure of the surface layer of steel components, in order to achieve better technical and economic benefits compared to homogeneous materials

The surface layer of a material is altered through chemical reactions to obtain a metal texture that is more suitable for application.