SKD6 1 mainly

Used for die casting dies, hot/warm forging dies, hot stamping dies, extrusion tools, stamping dies, shearing blades, measuring tools, wire drawing dies and various cutting dies.

All the above are the functions of SKD6 1.

Chemical constituents of SKD6 1

The chemical composition of SKD6 1 is as follows.

One of the characteristics of SKD6 1 is that it contains a lot of molybdenum (Mo) and vanadium (V).

SKD6 1 is a widely used die steel with strength and hardness, which is not only difficult to break, but also difficult to deform.

It can be said that the availability of SKD6 1 depends on these components.

Characteristics (advantages and disadvantages) of SKD6 1 as a material

SKD6 1 is a material used in various occasions, including molds. The characteristics of SKD6 1 material are introduced.

superiority

SKD6 1 contains a lot of molybdenum, so it has the advantage of excellent tensile strength at high temperature.

Mixed vanadium provides toughness, good heat resistance and crack resistance.

In addition, due to its high hardness and excellent wear resistance, it has the advantage of high versatility and can be used in a wide range of application fields.

What we can't ignore is that it is as easy to obtain as die steel.

record a demerit

The disadvantages of SKD6 1 are high quenching temperature and difficult processing. They are also easy to deform and change in size during heat treatment.

5.SKD6 1 hardness

SKD6 1 is characterized by high hardness, but how hard is it? Here is to explain the hardness of SKD6 1

Annealing temperature and hardness

Let's talk about the annealing temperature and hardness of SKD6 1. The annealing temperature is 820-870℃, and the annealing hardness (HBW) is lower than 229.

Temperature and hardness of quenching and tempering heat treatment

Tempering temperature is quenching 1020℃ and tempering is 550℃. Both are air-cooled.

The hardness after heat treatment is about HRC 53 ~ 56, but it depends on the size of the product. In addition, high temperature reflow is very important to ensure hardness.

SKD6 1 is a kind of metal whose hardness is improved by quenching and tempering, but on the other hand, it is prone to dimensional change and deformation during heat treatment.

SKD6 1 processing method

Grinding is mainly used for machining SKD6 1.

Grinding is a method of machining hard metal while scraping it with high-speed rotating polishing whetstone.

The difference from cutting is that cutting can remove a lot of metal with tools.

However, SKD6 1 is very hard and its machinability is not very good, so be careful.

SKD6 1 can be machined into the required shape by grinding (a kind of polishing) with high accuracy.

SKD6 1 process

Here are two processing methods suitable for SKD6 1.

heat treatment

Die steel is a kind of steel whose hardness can be improved by heat treatment after processing.

As mentioned above, the heat treatment of SKD6 1 includes annealing and tempering, and the hardness after these heat treatments is about HRC53-56.

Vacuum heat treatment is recommended as the heat treatment method of SKD6 1.

In vacuum heat treatment, the heating and cooling processes are carried out in vacuum, so steel does not contact with oxygen in the air.

It can prevent oxidation during heat treatment and "decarbonization layer" of carbon loss in steel due to oxygen.

electroplate

Electroplating is a treatment method that steel is put into a solution in which the metal covering the surface is dissolved in advance for electrolysis, so that the dissolved metal adheres to the surface of steel.

For SKD6 1 which is easy to rust, we suggest electroplating to prevent rust.

Considering the application, it is best to use industrial hard chromium electroplating and electroless nickel plating.

However, SKD6 1 has a high carbon content, and it is easy to form an oxide film on the surface of steel, which requires thorough pretreatment.

The difference between SKD6 1 and SKD 1 1

SKD 1 1 is a kind of steel that is likely to be judged to be very similar to SKD6 1. SKD 1 1 is die steel for cold working dies.

Applications include metal cutting tools, pressure gauges and wire rolling dies. The main difference between SKD6 1 and SKD 1 1 lies in hardness and strength.

As for hardness, SKD 1 1 is better. This is because SKD 1 1 contains more carbon and chromium.

SKD6 1 hardness after heat treatment HRC53-56, SKD 1 1 hardness after heat treatment HRC58-62.

On the other hand, SKD6 1 containing a lot of molybdenum and vanadium is superior in toughness and hot tensile strength.

SKD6 1 can maintain its strength even at the temperature as high as 300 C. With the increase of temperature, the strength of SKD 1 1 drops sharply.