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D stands for tool diameter.
It is expressed as several times the depth and length of the tool diameter, and is expressed as ○○D.
In drills and end mills, it is expressed as many times as the outer diameter of the tool, and in Tap , it is expressed as several times as the outer diameter of the thre
There are various units that express the properties of metal materials, and it is important to check their numerical values before processing metal materials.
It is also important to select a cutting tool that matches the hardness of the workpiece material.
Among steel materials, the units of materials to be processed by taps and drills include HRC, which represents the hardness of relati
Ductility is the property that even if force is applied to a material, it stretches or deforms without breaking.
Depending on the size of the strain until break, the size of ductility is expressed.
(FAQID:301)
It is easy to break when force is applied to the material.
Fragile and brittle nature.
(FAQID:302)
A mineral with carbon as an element. Same as a pencil lead.
Carbon element: It is made up of only C.
Graphite (Kokuen) English: Graphite
It is mainly used as an electrode for molds.
Fast tool wear.
When processing graphite, specialized tools and equipment are required.
(FAQID:303)
ductile cast iron is cast iron with improved strength and ductility. "Ductile" means "stretching" in English, and it is hard and stretchy, making it difficult to cut. It is also sometimes referred to as spheroidal graphite cast iron.
JIS symbols include FCD450 and FCD600.
Note that the higher the number, the stronger it will be and the more chips
High-tension material. High-tensile steel.
Anything above about 490 MPa is called high-tensile steel.
For example, in the case of SM490, the number (if it is 3 digits) indicates the tensile strength.
The main ones have a tensile strength of about 590 MPa and 780 MPa.
As for tool selection, if it is a three-digit number, it is generally possible to use general-purpose tools.
There are various methods and applications, but they are mainly intended for curing steel products.
After heating to the appropriate temperature by heat treatment, it is cooled (tempered) in an appropriate way.
Examples include carburizing and quenching, in which steel products are hardened to the inside, and induction quenching, in which only the surface is hardened.
(FA
The main way to harden stainless steel is to add aluminum, copper, niobium, etc., heat it, cool it rapidly, and then reheat it to produce precipitates and make it hard.
Typical examples include SUS630 and SUS631.
(FAQID:309)
