Hard alloy, also known as a metal hard compound alloy material, is an alloy material made through powder metallurgy process by combining refractory metal hard compounds and bonding metals. There are numerous types of hard alloys, suitable for various cutting, wear-resistant, and impact-resistant working conditions, thus being widely used in daily production. Next, Cheng Cheng will introduce you to the introduction of different types of hard alloys.

Hard alloys have a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. Especially its high hardness and wear resistance remain basically unchanged even at 500℃, and still have high hardness at 1000℃. There are mainly three types of hard alloys: cutting tool hard alloys, geological and mining tool hard alloys, and wear-resistant parts hard alloys.

1. Cutting tool hard alloys:
Cutting tool hard alloys are classified into six types according to the different application fields: P, M, K, N, S, and H;
P type: composed of TiC and WC as the base, with Co(Ni + Mo, Ni + Co) as the binder alloy, commonly used for processing long chip materials such as steel, cast steel, and long cutting malleable cast iron; taking the grade P10 as an example, the processing conditions suitable are high cutting speed, medium and small chip cross-section conditions of turning, profiling turning, thread turning and milling;
M type: composed of WC as the base, with Co as the binder, adding a small amount of TiC, commonly used for processing stainless steel, cast steel, manganese steel, malleable cast iron, alloy steel, alloy cast iron, etc.; taking the grade M01 as an example, suitable for fine turning, fine boring under high cutting speed, small load, and no vibration conditions;
K type: composed of WC as the base, with Co as the binder, adding a small amount of TaC, NbC alloy/涂层 alloy， commonly used for processing short chip materials， such as cast iron， cold-hardened cast iron， short chip malleable cast iron， gray cast iron， etc.；
N type： composed of WC as the base， with Co as the binder， adding a small amount of TaC， NbC or CrC alloy/涂层 alloy， commonly used for processing non-ferrous metals and non-metal materials， such as aluminum， magnesium， plastic， wood， etc.；
S type： composed of WC as the base， with Co as the binder， adding a small amount of TaC， NbC or TiC alloy/涂层 alloy， generally used for processing heat-resistant and high-quality alloy materials， such as heat-resistant steel， various alloys containing nickel， cobalt， and titanium；
H type： composed of WC as the base， with Co as the binder， adding a small amount of TaC， NbC or TiC alloy/涂层 alloy， commonly used for processing hard cutting materials， such as hardened steel， cold-hardened cast iron， etc.；

2. Geological and mining tool hard alloys：
Geological and mining tool hard alloys are classified into the following types according to the different application positions：
A： Rock drilling chisel sheet used hard alloys； the operating conditions such as grade GA05 are suitable for soft or medium-hard rocks with a single-axis compressive strength less than 60MPa， and grades GA50/GA60 are suitable for hard rocks or extremely hard rocks with a single-axis compressive strength greater than 200MPa； as the grade number increases， the wear resistance decreases and the toughness increases.
B： Geological exploration hard alloys；
C： Coal mining hard alloys；
D： Mining and oilfield drill bits used hard alloys；
E： Composite sheet matrix used hard alloys；
F： Snow removal sheet used hard alloys；
W： Excavation teeth used hard alloys；
Z： Other types；
The hardness of this category of alloys can reach HRA85 or above， and the bending strength is generally above 1800MPa.
3. Wear-resistant parts hard alloys
Wear-resistant parts are classified according to the application field：
S： Metal wire， rod， tube drawing used hard alloys， such as drawing molds， sealing rings， etc.
T： Pressing mold used hard alloys， such as fastener pressing， steel ball pressing molds， etc. Q: High-temperature and high-pressure components use hard alloys, such as the top hammer and pressure cylinder used for synthetic diamond.
V: Hard alloys are used for wire rod rolling roll rings, such as those used in the high-speed wire rod rolling finishing unit.