Cemented carbide, also known as metal carbide compound alloy material, is a hard compound of refractory metal and bonded metal through the powder metallurgy process made of an alloy material. There are many kinds of cemented carbide, which is suitable for various cutting, wear resistance, impact resistance and other conditions, so it is widely used in daily production. Next, Xiaobian will take you to take a look at the introduction of different kinds of cemented carbide.
Carbide has high hardness, wear resistance, strength and toughness, good heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance, even at 500 ° C temperature is basically unchanged, at 1000 ° C still has a high hardness. There are three main types of cemented carbide with cutting tools, cemented carbide with geological mining tools and cemented carbide with wear-resistant parts.
First, carbide for cutting tools:
Cutting tools with cemented carbide according to the use of different areas are divided into P, M, K, N, S, H six categories;
Type P: TiC, WC based, Co (Ni+Mo, Ni+Co) as the binder alloy/coating alloy, often used in the processing of long chip materials, such as steel, cast steel, long cutting malleable iron processing; Taking brand P10 as an example, the suitable processing conditions are turning, copying turning, threading and milling at high cutting speed, medium and small chip cross sections.
Class M: WC as the base, Co as the binder, add a small amount of TiC alloy/coating alloy, often used in stainless steel, cast steel, manganese steel, malleable cast iron, alloy steel, alloy cast iron and other processing; Taking M01 as an example, it is suitable for fine turning and fine boring under the condition of high cutting speed, small load and no vibration.
Class K: based on WC, Co as binder, add a small amount of TaC, NbC alloy/coating alloy, often used in the processing of short chip materials, such as cast iron, chilled cast iron, short chip malleable cast iron, gray cast iron, etc.
Class N: Alloy/coating alloy based on WC, with Co as binder, adding a small amount of TaC, NbC or CrC, often used in the processing of non-ferrous metals and non-metallic materials, such as aluminum, magnesium, plastics, wood, etc.
Class S: based on WC, with Co as the binder, add a small amount of TaC, NbC or TiC alloy/coating alloy, generally used for heat-resistant and high-quality alloy materials processing, such as heat-resistant steel, nickel, cobalt, titanium alloy materials processing;
Class H: WC based, Co as a binder, add a small amount of TaC, NbC or TiC alloy/coating alloy, often used in hard cutting gift processing, such as hardened steel, chilled cast iron and other materials;
Second, geological, mining tools with cemented carbide:
Geological, mining tools with cemented carbide according to the use of different parts are divided into the following types:
A: Carbide for drilling bits; Operating conditions such as grade GA05, suitable for uniaxial compressive strength of less than 60MPa soft or medium hard rock, grade GA50/GA60 for uniaxial compressive strength of more than 200MPa hard or very hard rock; With the increase of the grade number, the wear resistance decreases and the toughness increases.
B: cemented carbide for geological exploration;
C: cemented carbide for coal mining;
D: cemented carbide for mining and oilfield drills;
E: carbide for composite sheet matrix;
F: cemented carbide for shoveling snow flakes;
W: carbide for digging teeth;
Z: Other classes;
The Rockwell hardness of this class of alloy can reach HRA85 and above, and the bending strength is generally above 1800MPa.
Three, wear parts with tungsten carbide
Wear-resistant parts are divided into:
S: Hard alloy for metal wire, rod and tube drawing, such as drawing die, sealing ring, etc.
T: Hard alloy for stamping die, such as fastener stamping, steel ball stamping die, etc.
Q: High temperature and high pressure components with cemented carbide, such as synthetic diamond hammer, pressure cylinder, etc.
V: Tungsten carbide for wire rolling rings, such as high speed wire rolling finishing mill roller rings, etc.
