What turning tool is used for turning quenching workpieces? What is the best quenching tool with?

1. Cutting characteristics of quenched steel materials:

1) Large cutting force and high cutting temperature: In order to improve the cutting conditions and increase the heat dissipation area, the tool selects a smaller entering angle and a secondary entering angle. This will cause vibration, which requires good process system rigidity.

2) The cutting edge is easy to crush and wear: the contact between the turning chip and the cutting edge is short, and the cutting force and cutting heat are concentrated near the cutting edge of the tool, which is easy to make the cutting edge crumble and wear.

3) Thermal conductivity.

Low: The cutting heat is difficult to carry away through the chips, accelerating tool wear.

Second, the choice of turning and quenching steel tools:

1. BN-H05 grade: suitable for high-speed continuous finishing quenching steel, to achieve the effect of grinding by car, can replace imported CBN tools, finish.

It can withstand high-speed cutting and high processing efficiency.

2. BN-H10 grade: suitable for continuous or slight intermittent finishing quenching steel gears, the advantage is that the wear resistance of the single edge is good, and the finish can be achieved within the precision tolerance, which can replace the imported homogeneous products.

3. BN-H21 grade: suitable for strong intermittent finishing gears, that is, the intermittent working conditions of the processing surface of the workpiece with keyways or oil holes, such as: after quenching, the end face of the gear (with oil holes) and the inner hole of the gear (with keyway) are finished turning, so as to realize the grinding process by turning, the advantage of this tool is that it can withstand medium interrupted cutting, good impact resistance, and the accuracy and finish of the processed workpiece are good.

4. BN-S20 grade: suitable for large margin turning and quenching gears, such as rough turning gear tooth tops, gear rings, can withstand strong discontinuity, integral CBN tools, impact resistance and wear resistance.

3. Turning and hardening steel case:

It is recommended to use CBN turning blades for turning and quenching workpieces.

Quenched workpiece: such as quenched gear gear shaft, bearing, mold, synchronizer, ball cage universal joint, quenched roll and other parts belong to typical quenched parts, the hardness is about HRC60, and Virbac tools can be usedkbn200CBN cutters can be easily solved and guarantee a high surface finish.

Quenching is a way to increase the hardness of a tool. The quenching agents commonly used in quenching are: water, oil, alkaline water and salt solutions.

Generally speaking, salt quenching has the highest hardness, followed by water quenching. Oil quenching is the lowest (but toughness is the best). The material of the tool is different (such as carbon tool steel T8, T10, alloy tool steel, etc.), and the use is different (such as industrial and civil, etc.).

The heat treatment process is also different. The quenching method used is also different. Quench.

First, heat the kitchen knife to an orange-red state, and then quickly put the knife into cold water to cool, so that the knife can be sharper after cold cutting, which can improve the hardness of the knife. Quenching can make the knife not easy to rust, but quenching should not be operated by yourself, and it is safer to quench in a special place.

Summary. High chromium cast iron casting after high hardness, and the surface is uneven, there are sand inclusion, porosity and other casting defects, can be processed with cemented carbide tools, ceramic tools and CBN tools, but hard alloy tools have low hardness, wear is relatively fast, suitable for small batch production of high chromium cast iron, if large quantities of processing or sand inclusion, pores and other serious casting defects of high chromium iron castings recommended CBN tools.

BN-K1 material is a kind of insert specially developed for high hardness cast iron, with high hardness, excellent wear resistance and impact toughness, suitable for large margin cutting processing of high chromium cast iron without breaking the cutter, and has a long life.

For example, the parameters of the high-chromium cast iron industrial pump processed by BN-K1 material.

What material is used for high-chromium cast steel.

High chromium cast iron casting has high hardness after casting, and the surface is uneven, there are casting defects such as sand inclusion, porosity, etc., which can be processed with cemented carbide tools, ceramic tools and CBN tools. BN-K1 material is a kind of insert specially developed for high hard cover cast iron, with high hardness, excellent wear resistance and impact toughness, suitable for large margin cutting and processing of high chromium cast iron without breaking the cutter and long life. For example, the parameters of the high-chromium cast iron industrial pump processed by BN-K1 material.

Processing materials: Zhidong high chromium white mouth casting cavity Xian iron CR26 processing parts: wear-resistant and corrosion-resistant industrial pump impeller, pump body and other materials hardness:

60HRC tool material: BN-K1 cutting parameters: AP=, FR=, VC=75m minCutting method:

Dry and hard slap cutting. Comparison of the effect of BN-K1 material tools and ceramic inserts: In the case that the cutting speed of BN-K1 material is twice that of ceramic inserts, and the feed is greater than 40% of ceramic tools, the single-edge life of BN-K1 material tools is more than seven times that of ceramic blades.

Hello, I hope it can help you.

It is recommended to use CBN blades KBN100 and KBN200 quenched steel for quenched steel processing, the hardness of which is generally above 45HRC, and the plastic deformation is poor, the cutting resistance is large, and the cutting temperature is high. If the hardness of the tool material is low, the tool is difficult to cut and easy to wear (especially for internal hole machining). When rough turning of quenched steel parts, due to the large amount of cutting and high vibration, it is necessary to choose CNC inserts with high strength and impact resistance.

The reasonable cutting amount during machining is: cutting speed 30 45m min, feed, cutting depth.

Cubic boron nitride tools (PCBN tools KBN100, KBN200) hard turning hardened steel: It is most suitable for machining hardened steel parts with a hardness above HRC55 hardness after quenching. For continuous hard turning of hardened steel, and the depth of the hardened steel is less than that, we can choose KBN100 VÍK CBN tool grade, and when heavy intermittent hard turning of hardened steel, we can choose KBN200

GCR15 bearing steel is a high-carbon chromium bearing steel with less alloy content, good performance, and the most widely used. After quenching and tempering, it has high and uniform hardness, good wear resistance and high contact fatigue performance. The steel has medium plasticity in cold working, average cutting performance, poor welding performance, high sensitivity to the formation of white spots, and tempering brittleness.

GCR15 bearing steel with ,,。 The overall performance is good. It has good cutting performance after spheroidization annealing.

After quenching and tempering, the hardness is high and uniform, and the wear resistance and contact fatigue strength are high. Good thermal workability. Contains less alloying elements, ** is cheaper.

It is widely used in transportation, wind power energy, mining machinery, store equipment and other fields.

Selection of bearing steel tools after machining hot.

The metallographic structure of hardened bearing steel is a martensitic structure embedded with carbide, and the hardness of the bearing steel is improved after quenching and tempering, and good performance is obtained. However, when finishing, there are often problems of high hardness and difficult machining, such as fast tool wear, low efficiency and unsatisfactory surface roughness. At present, the tool materials suitable for machining high-hardness bearing steel parts are ceramic tools and KBN200 and KBN100 cubic boron nitride tools.

See: Reasonable parameters for CBN tools to machine quenched bearing steels.

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Try it out to find out.

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The bearing is also included in the quenched steel, the quenched steel is the quenched steel, the hardness is generally above HRC45, such as the gear steel 20CrMNTI carburizing and quenching hardness HRC58-62, the bearing steel GCR15 after quenching hardness HRC60-62, the die steel H13 after quenching hardness HRC65, and others, such as 42CRMO, 20CR and other hardness are very high, the current processing of quenched steel knives has coated carbide tools, Ceramic knives and CBN knives.

For hardened steel parts with a hardness of up to HRC45, low-cost coated carbide enables low-speed turning, which is also relatively inexpensive.

For hardened steel parts with a hardness of HRC45 or higher, ceramic tools and CBN tools are more economical for mass production.

When machining hardened steel, ceramic tools and CBN tools can be selected at the same time, so it is necessary to carry out a cost-benefit and machining quality analysis to determine which material is more economical. Ceramic tools are brittle and are mainly used for continuous machining, and CBN tools BN-H05 can also be used for continuous machining, so customers can analyze and compare them to determine which is more economical.

However, when intermittently processing quenched steel, it is not recommended to use ceramic tools, brittleness is large and intermittent and easy to collapse knives, at this time it is better to choose CBN tools, slightly intermittent with BN-H10CBN tools, strong intermittent processing with BN-H21CBN tools, such as large quenched steel after quenching deformation is greater than 1mm, and the cutting allowance is uneven, with BN-H200CBN tools, if the quenched steel allowance is greater than 2mm and above the allowance, then use BN-S20CBN tools, Large margin cutting does not collapse, and the tool is more wear-resistant.

Do you give points? Quenched steel can be turned with YS8, YT726.

After the quenching of the steel, you should use a tool with a lot of hardness, such as carbon steel knife, diamond knife, YT726 alloy turning tool, etc.

The quenching of steel is a heat treatment process in which the steel is heated to a temperature above the critical temperature AC3 (sub-eutectic steel) or AC1 (super-eutectic steel), kept warm for a period of time to make it fully or partially austenitized, and then cooled to below ms (or isothermal near ms) at a cooling rate greater than the critical cooling rate for martensite (or bainite) transformation. Solution treatment of materials such as aluminum alloys, copper alloys, titanium alloys, tempered glass, etc., or heat treatment processes with a rapid cooling process are usually referred to as quenching.

See: Three commonly used cutting tool materials for hard turning hardened steel and their selection.

You can use Y726 and YT30 to quench parts.

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