Heat Treatment Sae Astm Aisi M35 Steel Round Bar Manufacturer - China

M35 steel is high speed tool steel .

It also is called SKH55 steel and 1.3243 steel.

After the heat treatment, its hardness, red hardness and wear resistance can be improved.

M35 high speed steel is a good material for making tools which can handle high impact and abrasion.

And it always is used to make advanced die, screw dies, reamer, milling cutter, iron head, punch, complex shape tools with high toughness.

It is easy to do the hot and cold process.

After the quenching and tempering, the hardness will be the same as M42 steel .

And the hardness of them is 66±1HRC and 67±1 HRC.

M35 steel round bar plate sheet properties and chemical composition as below.

Compared with m35 cobalt-containing high-speed steel, it is cheap and easy to process.

Through proper heat treatment, high hardness (HRC67～70), high red hardness (4 hours at 625℃, HRC63～65) and high wear resistance, toughness and resistance can be obtained.

The bending strength is not lower than ordinary high-speed steel, which can overcome the early damage such as die edge collapse and cracking.

Features and applications: This steel is high-speed tungsten steel.

It is suitable for the manufacture of wear-resistant and impact-resistant tools for powerful cutting, advanced punching dies, screw dies, tools that require toughness and complex shapes, reamers, milling cutters, iron heads, punches, etc.

The main uses are hob, broach, end mill.

M35 steel is a cobalt-containing superhard high-speed steel with high wear resistance, high pressure resistance and sintering resistance.

Use hardness 364HRC.

The steel is expensive because it contains cobalt.

In order to reduce the price, my country has developed a cheap superhard high-speed steel M2Al without cobalt to replace the superhard high-speed steel M35 and M42 steel.

The process performance of M2Al steel is better than that of M35, and it is easy to be processed by cold and hot; the hardness after quenching and tempering is the same as that of M35 and M42, which are (66±1)HRC and (67±1)HRC respectively.

M35 Steel Annealing Process

If you case it up for the annealing after the forging, you will get a better result.

If you can not do that, just make it cold to the indoor temperature then make it in.

About the annealing process, just put it in the stove with the temperature which is lower than 500℃.

Then heat to 840-860℃, keep the temperature for four to five hours.

Furnace cooling to 500℃ below than out of it.

Cooling slowly in the annealing furnace.

After the annealing, its hardness is lower than 255HB.

In order to prevent oxidative decarburization happen, the annealing should be careful.

And there is an easy way can do that.

Just put some wood dust to the annealing furnace.

Notice for Quenching and Tempering

Preheat two times: 600℃, 860℃.

And the time of preheating is twice the time of heating.

The request of quenching is 10-12s/mm.

Needs the step hardening: 600℃→260-280℃→air cooling.

The temperature of secondary hardening is 535-540℃ around.

The hardness is bigger than 68HRC for after tempering.

But the factories do not want the hardness of cutting tool is more than 68HRC due to the request for production.

So it always is been tempering.

As we can see from the table, the best temperature for quenching is in the range of 1215-1225℃.

In this condition, it is suitable for annual cutting tools.

Its hardness is about 67-67.5HRC.

It satisfies the needs of high speed steel high speed steel for high strength, high hardness and high wear resistance.

M35 steel that been quenching at the temperature below 1190℃ is good material for cold work die and low-speed cutting tools.

And if it been quenching at the temperature higher than 1230℃ which will have a great red hardness.

It will be a good choice for turning tools and etc.

Quenching it in that way will cause overheating.

But it is not a trouble, the key is to control it in the right way.

Some cutting tools are overheating to be more useful.

For more steel product information, Please search our company(Dongguan Songshun Mould Steel Co., Ltd.) and check the official website!!!

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Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 076985475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , Guangdong , China

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• Website: https://songshunsteel.com/

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
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