JPS5830362B2 - Method of manufacturing metal parts with magnetic and non-magnetic parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing metal parts having magnetic and non-magnetic parts.

Such parts are widely used in a variety of machines and appliances.

These parts can be made by joining metals with dissimilar or contrasting properties, such as magnetic and non-magnetic, high or low electrical resistivity, different coefficients of thermal expansion, different Curie points, different strength and ductility properties. It is customary.

Metals having symmetrical properties such as those mentioned above are joined by welding, brazing, studding, gluing, casting, laminated plates or plating, as well as mechanical bonding and hot and cold pressing techniques.

However, when metal parts are fabricated by these conventional methods, the properties of the bonding metals that form the magnetic and non-magnetic portions of the parts deteriorate.

Furthermore, the production of parts made up of several separate pieces presents many technical problems.

For example, in conventional methods, metals with different crystal structures, such as a non-magnetic steel of the austenitic type and a magnetic steel of the martensitic type, are joined, usually by welding techniques.

To prevent the formation of hot cracks, austenitic steels are welded using a small amount of linear arc energy in combination with maximum cooling rates.

In contrast, large amounts of linear arc energy, always accompanied by tempering or heating, have been used to avoid the formation of cold cracks in welding martensitic steels.

However, when welding both magnetic and non-magnetic metals under the same conditions, the properties of one of the joined metals deteriorate,
Strength, ductility and impact resistance are weakened.

Moreover, during welding, the metals to be joined are heated to temperatures very close to their melting points, their initial structure changes and uncontrollable magnetic properties develop in the transition zone of the resulting parts.

Local metal mixing also promotes the development of uncontrollable properties within the seam.

Generally, the strength of welded joints is lower than the strength of the base metal.

Even if it is possible in practice to weld very dissimilar materials in some cases, this welding is unsuitable or extremely difficult.

Metal-to-metal bonding by hot or cold pressing or pouring one metal onto another provides sufficient durability to the resulting parts.

However, such a piece or integral part is bimetallic in nature, containing metals of different crystal structures, such as an austenitic non-magnetic structure of one metal and a martensitic magnetic structure of the other metal.

When heat-treating a Kaloe product made of this bimetal,
Heat treatments are rarely used, as they severely degrade the magnetic and mechanical properties of one of the metals that make up the bimetallic part, and in some cases are completely unsuitable for improving the properties of the magnetic and non-magnetic parts. be.

Parts produced by mechanical joining and bonding techniques of magnetic or non-magnetic metals do not have great durability, long-term strength and operability.

Although it is common knowledge that the magnetism of parts made of magnetic materials weakens when they are heated, attempts to use localized heat treatment in the case of stainless steel magnetic products have not yielded any positive results; This is because parts made by this method have parts with extremely weak magnetism.

Completely non-magnetic parts cannot be obtained.

Therefore, parts made using this technology are not suitable for practical use.

The main problem is therefore choosing a suitable metal for making the workpiece and determining its heat treatment methods and conditions.

The first object of the present invention is to provide a method for producing a metal part with a magnetic part, which allows the production of a permanent monolithic part, in which the magnetic part has a saturation magnetization B8 = 12000 ~ 24,000 Gauss, and in the non-magnetic part the permeability μ=1.0.

A further object of the invention is to improve and simplify the structural durability and labor capacity of the manufactured parts and to make the manufacturing process more inexpensive.

Yet another object of the invention is to produce a component having magnetic and non-magnetic portions of approximately 11 dimensions.

These and other objects of the invention can be achieved by a method of manufacturing a metal part having magnetic and non-magnetic parts comprising heat treatment of a solid workpiece, in which case, according to the invention, said workpiece is made of metal of which it is formed. Selected to obtain a magnetic structure in the aging process and lose magnetism after high temperature quenching, the part where the magnetic structure is to be produced is heated at a temperature of 450 to 98
It is heated to 0°C, soaked until a magnetic structure is formed, and then cooled, and the part where a non-magnetic structure is to be produced is heated to a temperature between 1000°C and the melting point of the metal of said workpiece, i.e. 1000°C. It is heated to a temperature of 1350° C. to maintain its integrity and cooled in water at a rate that prevents the formation of magnetic structures.

Articles made from monolithic workpieces according to the method according to the invention have a magnetic part with a magnetic permeability μ>1.0 and a magnetic part with a magnetic permeability μ=1.
．． It has a non-magnetic part with 0.

Preferably, the part where the magnetic structure is to be produced is heated to a temperature of 1
Preheat to 050-1350°C, soak until temperature is equal throughout the entire volume, then cool.

Such preheating makes it possible to eliminate the effects of pretreatment and to adjust the level of its structure (grain size, nature and precipitation of excess phase) and physico-mechanical properties.

It is advantageous to additionally heat the part in which the magnetic structure is to be produced to 850-950[deg.] C., soak it until the temperature averages over its entire volume, and then cool it.

This increases the coercive force of the resulting magnetic portion.

The workpiece may contain at least 1 part by weight of carbon, at least 0.5 to 25 parts by weight of nickel, at least one element from the group of cobalt, 20 to 60 parts by weight, at least 9 to 30 parts by weight of chromium and vanadium. It is desirable to use a workpiece containing one of the elements from the group of and the remainder almost entirely iron.

Such workpieces can obtain a magnetic structure after aging, and this can be erased after high-temperature quenching.

Metalwork containing 32-75% nickel by weight may also be used for purposes of the present invention.

As a result, a high magnetic permeability of the metal in a magnetic field with a weak magnetic force and good ductility and impact strength can be obtained.

The metal of the Kaloe product can also be advantageously alloyed with at least one element from the group consisting of molybdenum and tungsten within a range of 1.5 to 10% by weight.

This provides high corrosion resistance in seawater, salt water or other aggressive media and improved magnetic properties.

The metal used in the workpiece can also be suitably alloyed with 0.7 to 10 gb of aluminum.

This improves the magnetic properties of the metal. 0.03-0.5
It is convenient to use workpiece metal alloyed with nitrogen of weight φ.

This increases the strength of the metal and improves its magnetic properties.

The metal of the workpiece can also be effectively alloyed with 0.2 to 3 wt. titanium.

The corrosion resistance of finished products or parts to be obtained with such alloys can be improved.

The workpiece metal can also be alloyed with 0.3-3 gw steel.

In this case, corrosion resistance and magnetic properties are improved.

Preferably, the workpiece is cooled in a magnetic field during the formation of the magnetic structure.

This improves the magnetic structure and magnetic properties of the produced magnetic part.

It is advantageous to subject the produced parts to low temperature or sub-zero processing.

By such treatment the quality of the magnetic component is increased and the magnetic properties of the magnetic part are thereby practically improved.

Thus, the present invention can acquire a magnetic structure during the aging process and disappear the pre-magnetic structure after high temperature quenching,
At least one of the elements from the group consisting of carbon, nickel, and cobalt under 1 weight multiplate, and 0.0 for nickel.
5 to 25 or 32 to 75 weight hiro 20 for cobalt
~60% by weight, at least 9~30% by weight of at least one element from the group of chromium and vanadium, the remainder being mostly iron, or in addition to the above components, additionally 1.5~30% by weight
10wt multiwt buden and/or tungsten, 0
．． 7-10 weight multi-weight minium, 0.03-0.5 weight φ of nitrogen, 0.2-3 weight of titanium and 0.3-3
including the heat treatment of a monolithic workpiece made from a metal containing at least one element selected from the group consisting of heavy weight steels, the remainder being substantially all iron, to produce a magnetic structure in said workpiece; The part in which a non-magnetic structure is to be produced is heated to a temperature of 450 to 980°C, soaked until a magnetic structure is generated therein, and then cooled, and the part in which a non-magnetic structure is to be produced is heated to a temperature of 1000 to 1350°C. The present invention relates to a method for manufacturing metal parts having magnetic and non-magnetic parts, characterized in that the metal parts are heated to a temperature of 0 to maintain their integrity and then cooled in water.

When the composition range of the composite part as described above is outside the heat treatment temperature range, the magnetism of the alloy makes it impossible or very difficult to form or separate a magnetic phase, or The volume will be insufficient and it will not be possible to reach the level of magnetic properties that satisfy the definition of "magnetic material".

Therefore, each of the above composition ranges is limited to a range in which the alloy can have a metastable austenitic structure from which the magnetic phase can be separated during the heat treatment process.

As mentioned above, corrosion resistance and magnetic properties can be improved by molybdenum and other elements added to the alloy; however, if the content of each element is less than the amount listed, none of them will produce the expected effect. , and adding more than the content range no longer increases the expected effect.

Also, as mentioned above, the heating temperature at which the alloy according to the invention obtains a magnetic structure is equal to 450 DEG -980 DEG C., and only this temperature range is suitable for imparting a magnetic structure to the alloy according to the invention.

And in order to obtain a non-magnetic structure, heating is carried out at temperatures above 1000°C but up to 1350°C;
At 350°C, the metal almost melts and loses its integrity.

The present invention will be explained in more detail below with reference to examples.

When making metal parts from metals that acquire a magnetic structure during the aging process and lose this after high-temperature quenching, it is sufficient to simply carry out a local heat treatment on the desired areas of the workpiece.

The temperature of the part where the magnetic structure is to be generated is 450-98
Heat to 0° C. and soak or age until a magnetic structure is formed, then cool.

The part where the non-magnetic structure is to be produced is kept at a temperature between 1σOO℃ and the melting point of the workpiece, i.e. 1000℃, without losing its integrity.
It is heated to a temperature of ˜1350° C. and then cooled in water at a rate that prevents the formation of magnetic structures.

Alternatively, the metal workpiece is heat treated to make it magnetic, then locally heat treated the part of the workpiece to make it a non-magnetic structure, and the parts not subjected to the local heat treatment become magnetic. You can also leave it as is.

When the workpiece is made of a non-magnetic metal with the required non-magnetic properties, it is most appropriate to use a localized heat treatment on the part to be rendered magnetic, thereby forming an integral part with magnetic and non-magnetic parts. parts can be obtained.

Metals can be easily prepared that can acquire a magnetic structure during the aging process and lose this after heat treatment.

An example of its chemical composition is shown below.

The composition of the metal is varied with additional components that improve its corrosion resistance, coercivity, saturation magnetism (L remanence), magnetic permeability, electrical resistance, structural stability and mechanical properties.

Row 1 To produce a metal part with magnetic and non-magnetic parts, an alloy was made with the following chemical composition: carbon 0.45
weight hiro kobal) 39.5 weight hiro nickel 0.5 weight φ,
Chromium: 11.8 weight φ, vanadium: 0.39 weight, manganese: 0.32 weight, silicon: 0.20 weight, the rest is iron.The temperature of this alloy ingot is 1180-850.
Perform hot plastic deformation at ℃.

Next, from this ingot, length 500wrL% diameter 60r
I made an integrated ran product.

The workpiece is heated to 1050° C., soaked and cooled.

The workpiece is then heated again to 650° C. and soaked at this temperature for 1 hour.

During this soaking, a magnetic structure is formed throughout the entire volume of the workpiece.

After this, the part of the workpiece in which the non-magnetic structure is to be produced is locally heated to 1200° C. and then cooled in water.

As a result, the locally treated part obtains a non-magnetic structure.

The magnetic part has the following magnetism: saturation magnetization B8 = 23,500 Gauss, coercive force collection = 75 Oe, remanent magnetism Br = 9,000 Gauss.

The magnetic permeability of the non-magnetic portion was μ=1.00.

F! By the method of IN, metal parts with magnetic and non-magnetic parts are obtained if the heat treatment is carried out in the following temperature range: the whole workpiece is heated at 1050-1350 °C and homogenized until the whole metal is heated. Heat and cool, 450-980
C. and soaking at this temperature until a magnetic structure is formed, then locally heating the required parts at a temperature between 1000.degree. C. and the melting point and cooling in water.

ρu2 An alloy with the same chemical composition as row 1 was melted to produce a metal part with magnetic and non-magnetic parts.

Alloy ingots are treated similarly. To increase the coercive force, the processed product was heated to 900°C before local heat treatment.
And at this temperature, it is soaked until the whole is heated, and then it is cooled in air.

The magnetic part has the following magnetic properties: saturation magnetization B8=16
000 gauss, coercive force collection = 120 oersted, residual magnetism Br = 7100 gauss.

The magnetic permeability of the non-magnetic part μ=1.00, which is obtained by a local treatment similar to that in Example 1.

The workpiece is cooled in a magnetic field while creating a magnetic structure therein.

In this case, the magnetic properties of the magnetic part are improved.

Example 3 An alloy with a chemical composition similar to that in row 1 was melted to produce a metal part with magnetic and non-magnetic parts.

An ingot of this alloy was subjected to hot plastic deformation within the same temperature range of 1180 to 850°C, and then a monolithic workpiece with a length of 120 m% and a diameter of 12 mm was made from this ingot.

The Karoe product is heated to 900° C., soaked and cooled in air to obtain a magnetic structure.

Next, the part to be made non-magnetic is heated to 1
Local heating to 175°C followed by cooling in water.

Tests have shown that the parts treated in this way have a non-magnetic structure.

The part of the workpiece that was not subjected to local heating was then placed in a magnetic field.

As a result of the magnetization, these parts had the following properties: saturation magnetization B8 = 22000 Gauss, coercivity force = 105 Oe, remanence Br = 8500 Gauss.

Example 4 To produce a metal part with magnetic and non-magnetic parts, an alloy with the following chemical composition was melted: 0.3 carbon
7 weight excellent, silicon 0.6 weight related, manganese 0.4 weight chromium 17 weight φ, nickel 6.2 weight large titanium 0.5
The remainder of the weight is substantially iron.

This alloy was subjected to hot plastic deformation in a temperature range of 1180 to 850'C, and an integrally processed product with a length of 500 mm and a diameter of 12 pieces was made from this ingot.

The workpiece is heated to 700° C. and soaked for 50 hours, then cooled in air.

A magnetic structure is formed throughout the entire volume of this soaked medium.

Next, in order to obtain a non-magnetic part, this desired part is heated to 1200° C. with a high frequency current.

After cooling in water, the locally treated part has an austenitic non-magnetic structure.

The remainder of the workpiece has the properties of a soft magnetic material.

Alternatively, the method described in Example 4 has a workpiece alloy of 0.5 to
25 weight φ of nickel, 9 to 30 weight φ of chromium, 0.
When containing 5-3% titanium, if the ratio of the elements is such that it ensures a magnetic structure in the aging process and obtains a non-magnetic structure after high temperature quenching, it will produce metal parts with magnetic and non-magnetic parts. be able to.

Target 5 In order to improve the corrosion resistance of the parts produced, the alloy used in the production of the workpiece is carbon 0.19, manganese 0.4
Excellent weight, silicon 0.65 weight, chromium 15.7 weight φ
, 6.3% by weight of nickel, 2.1% by weight of molybdenum, 0.3% by weight of tungsten, and the remainder consisting essentially entirely of iron.

Workpieces made from this alloy are processed similarly to row 4.

The method according to column 5 uses a metal alloyed with at least one element from the group molybdenum and tungsten within 1.5 to 10 weight φ, again producing a metal part with magnetic and non-magnetic parts. be able to.

The magnetic properties of the magnetized portion are improved by cooling the workpiece to sub-zero temperatures prior to local treatment.

Example 6 This series is similar to Example 5, except that 0.8 weight more aluminum is alloyed to improve the magnetic properties of the metal.

The method according to Example 6 can also be carried out to produce an integral metal part with magnetic and non-magnetic parts in the case of using a metal alloyed with aluminum 0.5 to 3 wt.

Column 7 To produce a metal part with magnetic and non-magnetic parts, carbon 0.37 wt. Artifacts were made from alloys made almost entirely of iron.

The processed products were processed in the same manner as in column 4.

The method according to column 7 can be carried out to produce metal parts containing magnetic and non-magnetic parts when using metals alloyed with up to 1 weight percent carbon.

Example 8 To produce metal parts with magnetic and non-magnetic parts in a high-frequency induction furnace, an alloy with the following chemical composition was melted: 0.65% carbon by weight chromium 12.7%, cobalt 39% by weight, Vanadium 1.8% by weight, manganese 0
．． 2 weight more, silicon 0.3 weight φ, copper 0.4 weight φ, and the rest is almost all iron.

An ingot of this alloy is hot-plastically deformed at a temperature in the range of 1180 to 850°C, and a length of 120 mm is made from this ingot.
I made an integrated product with a diameter of 8.

The workpiece was heated to 1180°C, soaked until the temperature was uniform throughout the workpiece, and then cooled in water.

As a result of this treatment, the high temperature non-magnetic state is fixed, the required grain size and excess phase content in the metal structure are fixed, and the preceding cold working with hot plastic deformation is omitted.

It should be noted that these factors may otherwise affect the physicochemical properties of the workpiece metal.

The workpiece is then heated to 600°C and soaked for 2 to 20 hours.

During this soaking, the formation of magnetic structures takes place over the entire metal volume and the workpiece is magnetized.

Thereafter, in order to increase the coercive force, the metal is heated to 900° C., soaked until the entire workpiece is heated, and then cooled in water.

Finally, the part of the workpiece to be made non-magnetic is locally heated to 1200° C. and cooled in water to fix the hot austenitic non-magnetic state.

After magnetization, the parts that did not undergo local heating had the properties of a hard magnetic material.

In this embodiment of the method for producing metal parts with magnetic and non-magnetic parts, the content of chromium and vanadium in the workpiece metal varies between 9 and 30 parts by weight, and 3 and 3 parts by weight.

Row 9 To produce a metal part with magnetic and non-magnetic parts, carbon 0.95 wt., chromium 12.7 wt. φ, cobalt 39 wt. φ, manganese 0.2 wt. φ, silicon 0.3 wt. predominant, remainder melts almost all iron.

An ingot of this alloy was plastically deformed for one orbit within a temperature range of 1180 to 850°C, and a length I was made from this ingot.
An integrated workpiece with a diameter of 20 trans and 8 rran was made.

The product was heated to 1180°C, soaked until the temperature of the entire volume of the processed product was uniform, and cooled in water to fix and ensure the high temperature non-magnetic state. Next, the processed product was heated to 600°C. ,
After soaking at this temperature for 20 hours, the entire workpiece becomes magnetic.

After this, the workpiece is placed in a magnetic field for magnetization. The parts to be made non-magnetic are locally heated to 1200°C, soaked until the whole is heated, soaked until the whole is heated, and then submerged in water to fix the high-temperature austenitic non-magnetic state of these parts. Cooling.

The part that was not affected by local heating acquired the properties of a hard magnetic material.

Row 10 To produce a metal part with magnetic and non-magnetic parts, carbon 0.65 wt., chromium 12.7 wt. The remaining part was made from an alloy made of almost entirely iron.

The workpiece was processed as in row 8.

Example 11 To produce a metal part with magnetic and non-magnetic parts, carbon 0.65 weight ROM 12.7 weight φ, cobal)
An integral processed product was made from an alloy of 39.0 weight, 0.2 weight of manganese, and 0.3 weight of silicon, with the balance almost entirely made of iron.

The processed product was processed in the same manner as in Example 9.

Example 12 0.47% carbon by weight, 0.4% manganese to 0.4% silicon to produce a metal part with magnetic and non-magnetic parts.
．． 6 weight φ, Kobal) 39.3 weight φ, vanadium 10
An integrated product was made from an alloy that is mostly heavy and the rest is iron.

This workpiece was treated in the same manner as in Example 9.

Column 13 To produce metal parts with magnetic and non-magnetic parts in a high frequency induction furnace, an alloy was made with the following chemical composition: carbon 0.45 heavy manganese 1.6 weight diagonal;
Chromium 20.5% by weight, Nikkei/I/45.2% by weight,
Nitrogen is 0.07% by weight, and the remainder is mostly iron.

An ingot of this alloy was subjected to hot plastic deformation, and an integrally processed product with a length of 120 mm and a diameter of 8 TML was made from this ingot.

The processed product is heated to 700° C. and soaked at this temperature for 100 hours.

This heating forms a magnetic structure in the workpiece metal, making the workpiece magnetic.

Next, the portion to be made non-magnetic is locally heated to 1150° C., and cooled in water to ensure the non-magnetic state.

The part of the workpiece that has not undergone local heating has the properties of a soft magnetic material and has the following properties: permeability 160 in a magnetic field of 2 Oe, magnetic induction 3000 Gauss in a magnetic field of 150 Oe.

In this embodiment of the method for producing metal parts with magnetic and non-magnetic parts, the nickel content in the workpiece metal varies between 32 and 75 parts by weight, and the nitrogen content reaches well over 0.5 parts by weight.

Column 14 This example is similar to Example 13, except that repeated localized heating of the part desired to be made non-magnetic is carried out, thereby changing the physico-mechanical properties of the processed part of the workpiece. The objective is to more completely resolve the excess phase in the metal solid solution.

Column 15 This column is similar to Column 13, except that localized heating of the areas desired to be non-magnetic is carried out until they melt, and the position of these areas is such that the integrity of the workpiece is compromised. It is the choice not to be made.

Depending on the crystallization of the melted part, structures with different physico-mechanical properties are obtained.

For this technique, well-known mold plate, electron beam and laser techniques, etc., are usefully used as sources of concentrated thermal energy for localized heating purposes.

Example 16 To manufacture metal parts with magnetic and non-magnetic parts, carbon is 0.12 weight φ, manganese is 1.6 weight φ, chromium is 17.9 weight, nickel is 47.4 weight, and almost all of the rest is iron. An alloy consisting of the following was melted.

An ingot of this alloy was subjected to hot plastic deformation in a temperature range of 1100 to 850°C, and a length of 120T was made from this ingot.
I made an integrated product with rrM1 diameter of 8 cabinets.

The workpiece is heated to 1100°C, soaked at this temperature until all of the metal is heated, and then cooled in water to determine the high temperature state (grain size, crystal structure, excess phase, cold hardening due to preceding hot plastic deformation). to fix or ensure that there is no

Next, heat the processed product to 700℃, and at this temperature
Soak for an hour and cool in air.

This magnetizes the workpiece. Thereafter, the parts of the workpiece to be made non-magnetic are locally heated to a temperature of 1200° C. by high-frequency current, soaked until the entire part is heated, and then cooled in water to fix or ensure the high-temperature non-magnetic state.

The portion of the product that has not been subjected to local heating has the properties of a soft magnetic material.

Example 17 To manufacture metal parts with magnetic and non-magnetic parts, carbon is 0.13 weight φ, manganese 1.6 weight φ, chromium 17.8 weight φ, nickel 57.3 weight φ, copper 0.3 weight φ. , the processed product was made from an alloy composed of the remainder iron.

IF this processed product! It was treated in the same manner as J16.

The main aspects of the embodiments of the present invention will be explained as follows.

1. The workpiece is cooled in an open magnetic field in which a magnetic structure is formed.

The method according to claim 1 or 2.

2. The produced parts are processed by sub-zero cooling.

The method according to claim 1 or 2. 3. The method according to claim 1 or 2, wherein the part in which the magnetic structure is to be generated is preheated to a temperature of 1050 to 1350°C, and soaked until the entire cross section thereof has a uniform temperature, and then cooled. .

4. The part where the magnetic structure is to be generated is further heated to a temperature of 8
The method according to claim 1 or 2, wherein the method is heated to 50 to 950°C, soaked until the entire cross section becomes a uniform temperature, and then cooled.

Claims (1)

[Claims] 1. Elements from the group consisting of carbon, nickel and cobalt that can acquire a magnetic structure during the aging process and disappear the pre-magnetic structure after high temperature quenching, with a high yield by weight. 0.5 to 25 or 32 to 75 weight φ for nickel, 20 to 60 weight φ for cobalt, and 9 to 30 weight φ of at least one of the elements from the group of chromium and vanadium. The section includes the heat treatment of monolithic workpieces made almost entirely from ferrous metals, and the section in which a magnetic structure is intended to be produced during said processing is 450-9.
The product is heated to a temperature of 80°C, soaked until a magnetic structure is produced therein, and then cooled and the part in which a non-magnetic structure is to be produced is brought to a temperature of 1000°C to 1350°C. 1. A method for producing metal parts with magnetic and non-magnetic parts, characterized in that they are heated to maintain their integrity and then cooled in water. 2. A magnetic structure can be acquired during the aging process and the pre-magnetic structure can be disappeared after high temperature quenching, and nickel with at least one element from the group consisting of carbon, nickel and cobalt in an amount of one or more by weight or more. 0.5 to 25 or 32 to 75 weight units for cobalt, 20 to 60 weight units for cobalt, 9 to 30 weight units of at least one element from the group of chromium and vanadium, and further 1.5 to 10 weight units. Molybdenum and/or tungsten in a predominant amount by weight, aluminum in a predominant amount from 0.7 to 10% by weight, nitrogen in a predominant amount from 0.03 to 0.5% by weight,
An integrally constructed workpiece made from a metal containing at least one element selected from the group consisting of 0.2 to 3% titanium and 0.3 to 3% steel, with the remainder almost entirely iron. The part in which the magnetic structure is to be produced during said processing is heated to a temperature of 450 to 980°C, soaked until the magnetic structure is produced therein, and then cooled; A method for producing metal parts having magnetic and non-magnetic parts, characterized in that the part in which the non-magnetic structure is to be produced is heated to a temperature of 1000 to 1350 DEG C. to maintain its integrity, and then cooled in water.