DE1298293B - Highly wear-resistant, machinable and hardenable sintered steel alloy and process for their production - Google Patents

Description

1 2

The invention relates to post-processing which is highly wear-resistant and can be omitted. Non-strength, machinable in the solution-annealed condition and it is desirable that the alloy be characterized by precipitation-hardenable sintered steel with high heat resistance,
alloy as well as a method for producing this The invention consists in that the sintered alloy alloy. 5 from 20 to 80 percent by volume carbides, among which

Hardenable sintered steel alloys consisting of a car- at least one of the groups TiC, VC, NbC, and TaC bid and steel components, for example made of titanium, and a precipitation hardenable steel carbide and a carbon steel, composed matrix, which is less than 0.15, in particular we- and by powder metallurgy to bodies less than 0.10 percent by weight carbon, 10 to are already known. The carbide ίο 30 weight percent nickel, up to 25 weight percent component in amounts of 12.5 to 87 weight cobalt, up to 10 weight percent molybdenum, 0.2 to percent of the total mass may be 9 percent by weight titanium, up to 5 percent by weight the steel alloy matrix to increase the aluminum, so that the sum of titanium and aluminum wear resistance admitted. Such sintered steel does not exceed a minimum of 9 percent by weight, the remainder Alloys, for example, contain titanium carbide, which is iron, in addition to impurities caused by production uniformly in a heat-treated matrix. Refer to the specified volume percent is distributed and in which the proportion of titanium is at least based on the total mass, while the specified 10 Weight percent of the total mass. The weight percentages are only based on the steel matrix. draw. The carbide is in particular in the form of iron, the weight of which is present in this basic carbide grain, which is in the steel alloy mass In general, at least 60 percent by weight of the base mass are distributed, which is a soft marten. With a proportion of 12.5 to 87 by weight, it has a microscopic structure. Titanium can also be used as a percentage or 20 to 90 percent by volume of titanium carbide, at least partially due to other strong carbide formers carries according to the British patent 778 268 the Ti except molybdenum and chromium, namely by amount of vanatan 10 to 70 percent by weight. 25 dium, niobium, tantalum, zirconium, be replaced by their

Furthermore, a sintered steel alloy is known, the proportions easily determined by routine tests.

at least one of the refractory carbides from the bar are.

Contains group VC, NbC and TaC and in which the said alloy is according to the invention for

Steel alloy base material essentially from a powder metallurgical production of tools,

consists of carbon steel, the weight of which determines tool parts and machine elements,

proportion of the total mass 25 to 75 percent by weight The sintered bodies can be in the form of rod material,

amounts to. Round profiles, square profiles, blocks, bars or

There are basically two manufacturing processes other shapes are made. Since the sintered such Sintered steel alloys with a content of hard bodies in the solution-annealed condition substances, such as carbides, borides or nitrides, are common. 35 can be machined or easily sanded, these Once the alloy can be cut or punched by mixing the powdered sintered body in this state Starting components, presses and sin and broaching tools, to form and forged tools can be produced, or one first produces a countersink, for drawing, extrusion and upsetting dies, Hard material, in particular carbide skeleton, and soaked into rollers and similar tool parts or this skeleton with the desired steel base. 40 other machine elements can be formed. Because The microstructure of the steel base mass contains the high heat resistance are also tools or essential perlite. The remunerated product will then be able to manufacture tool parts or machine elements, through machining, namely through the high wear resistance and heat turning, Grinding or the like, should be distinguished in the desired shape resistance. Because of the delay brought and then a heat hardening due to austenite-free 45 precipitation hardening and the rest Sizing the hardened and tempered tool steel with excellent properties is that according to the invention temperature of 950 ° C for approximately 4 hours and sintered steel alloy similar to all generic and then submerged in oil or water - consider alloys.

frightened. In such tool steels, titanium carbide in particular has proven to be the primary carbide

Hardness reached up to 70 Rc. 5 ° advantageous excellent.

Sintered steel alloys with a carbide content, where the term "primary carbide" means that the steel base material can be hardened by transformation, stable carbide that is added to the steel alloy types as such as a result of the base material occurring during the transformation and in which there are frequent cracks in the micro - Is essentially insoluble, so that it is underneath the microstructure, which can still be recognized when stressed, in particular through 55 scopes, after the knock-out, starting points for fatigue fractures on the parts used in the raw materials and forming the parts used in the sintered body operation. Besides volume heat-treated. After a further change, such sintered steel alloy design of the invention is the steel alloy stanchions during hardening. The post-machining base material is composed as follows:
Working is highly undesirable because the cutting 60

the tools, e.g. B. grinding wheels, because of the high weight percent Carbide content of the workpiece to be machined

wear out quickly. Nickel 10 to 22

The invention is based on the object of a
Sintered steel alloy with embedded carbide at 65 cobalt 2 to 10

create that with high wear resistance, good loading molybdenum 2 to 8
workability and hardenability has a practically negligible hardening delay, so that the un- Titanium 0.2 to 9

3 4

Weight percent excess of 0.2 to 0.4 weight percent free

Aluminum up to 5 titanium for the steel alloy matrix.

so that the sum of titanium and aluminum is a particularly advantageous sintered steel alloy minium does not exceed 9%, the remainder in the basic steel alloy according to the invention Iron; The iron content is 16 to 22 percent by weight nickel, 6 to 10 percent by weight at least 50 percent by weight cobalt, 2 to 6 percent by weight molyb percent. Danish, 0.2 to 1 percent by weight titanium and up to 0.4 percent by weight Aluminum as well as the rest of these

If the nickel content is from 10 to 22 percent by weight, essentially iron, in a proportion and the sum of the proportions of titanium and aluminum is at least 50 percent by weight. In this case, less than 1.5, in particular less than the following constituents in a total amount of 1.3 percent by weight, it is expedient that up to 10% of the cobalt and molybdenum proportions are kept at least in this steel alloy base:
Make up 2 percent by weight. If the nickel content is * ^ ₀ / chrom
between 18 and 30 percent by weight and the molyb 15 up to 7 ° / ° tungsten
dendehalt is less than 2 percent by weight, it is _{big m} 3 _o f _{Niofe un (} J _{/ or tantalum} ,
expedient if the sum of the proportions of titanium * _u ^ 0 / Krmfer
and aluminum exceeds 1.5 weight percent. up to 0 5 °° / manganese
All of these weight specifications relate to up to 1 '° / Bervllium'
because only on the steel alloy matrix. 20 Io y ■
If a high hardness of this basic material is desired. These sintered steel alloys can be used before the hardening of the titanium and / or aluminum content should be in the range of 5 to 9 percent by weight to essentially precise dimensions. machining if they are after sintering at Since the sintered steel alloy should contain practically no free high temperature solution heat treatment under carbon, it is preferable to throw and cool in the air, so that one of the starting substances that are also no or soft Martensite matrix is formed. The hardening applied after at most only a very small proportion of the free of the solution heat treatment has different carbon. So it is advisable that the det in principle from hardening by free carbon content on the steel alloy base high-temperature austenitizing and the subsequent mass is less than 0.10 percent by weight. Even 30 quenching that the relatively low temperature vein in the carbide free carbon should be used very well, while the basic low; Since there is a certain amount of free carbon in the martensitic state and the fact that connecting material can usually not be avoided, cooling is continued in air. The heat treatment is, in principle, precipitation hardening of the mixture to be sintered, since components of a strong carbide former are present besides molybdenum and chromium 35, which are associated with precipitation hardening, which is favorable in the steel alloy base material. This heat treatment is essentially insoluble in a carbide. For this purpose, the temperature range from 260 to 65O ⁰ C carried out, is particularly well suited excess metallic In the following examples of the invention are written titanium, which combines with the free carbon:

and forms a secondary titanium carbide. Examples are 40 B bis ο ie 1 1
Its strong carbide formers, which form essentially insoluble carbides, are vanadium, niobium and a carbide-tantalum suitable for heat treatment. After further training, the preserving tool steel consists of the following main finding of this excess titanium in the form of constituents:

When TiH _{2 is added, 45 primary titanium} is produced during processing. _Carbide 45 percent by volume

reactive titanium for connection with the steel matrix as a base material .... 55 percent by volume free carbon. Similarly, zirconium can be added in the form of zirconium hydride. The matrix had the following composition. The amount of titanium to be added is calculated as follows:
net that they are at least 4 times the amount of 50 weight percent

of free carbon, Ni 21.7 bound to TiC

should be, plus additional titanium, so 0.2 Co 8.49

up to 0.4 percent by weight of free titanium is available, Mo 3.42

passes into the steel alloy base mass. If you go Ti 0.37

for example 45 percent by volume (33 weight- 55 Fe *) im

percent) TiC, which contains 19.45 percent by weight of total carbon and is bound to a content of
denem carbon of 17.75 percent by weight decomposes
falls, 1.7 percent by weight of free carbon is lost
joinable. The free carbon is calculated in a 60 *) The »remainder of iron« contains small amounts of other mixtures of 45 percent by volume TiC and 55 percent by volume, which do not affect the new properties of the alloy percent (67 percent by weight) steel alloy base.

mass at 0.56 percent by weight. To this mixture 500 g of TiC powder with an average particle size of 2.8 percent by weight of TiH ₂ , based on the 5 to 7 μπι are added with 1000 g of powdered, total steel mixture, and this results in a forming components corresponding to the Above enough amount of reactive titanium for the stated composition of the steel alloy base compound mixed with the free carbon to form mass. The TiC powder used has one of a secondary titanium carbide and creates a total carbon content of 19.45 percent by weight,

5 6

corresponding to a total content of the powdery mass. If, when producing a sintered steel alloy, a mixture of 6.48 percent by weight carbon. similar to the above-described TiH ₂ from the genus

For best results a carbon mixture is left out, the hardness is according to the content of the metal base material below 0.15 weight- mere sintering 57.8 Rc and after solution heat treatment percent of the base mass desired. 5 and cooling from 1500 ° C 61.5Rc. Because the free

The 1500 g of the mixture (500 g TiC and 1000 g carbon could not form a bond with titanium, the steel-forming additives) for every 100 g of the rise, the hardness after the solution heat treatment becomes essential Mix 1 g of paraffin wax added. The mixture exceeded 50 Rc and reached a value of 61.5 Rc. is used for 60 hours using hexane. Further composition examples from the inventions Carriers in a ball mill made of stainless steel, in the range according to the invention, are as follows. There are those half filled with stainless steel balls, nominal values of the proportions of the steel alloy matrix ground. After grinding, the mixture is based on the weight of this base mass, a hot plate at 68 ° C until the hexane ^. . .

is completely eliminated. The dry powder is then Example I.

to compacts under a pressure of 2100 atmospheres. 15 Primary carbide 30 percent by volume TiC

presses. Basic mass 70 percent by volume steel

The compacts produced in this way are composed of a sintering process

in the liquid phase by heating to percent by weight _{for 2V a hours}

about 1425 ° C in vacuum and maintaining the ^. "~

Subject to temperature for ³ J ₁ hour. An ao t ;. ¹ ...

then cooling takes place in 30 minutes to 1300 ° C j · ¹ . ji'iz

and furnace cooling from 1300 ° C to room temperature. ^ ¹ ZfTi

The sintered body is preferably on a ceramic., "',

mixed plate is placed, consisting of previously burned rr ¹¹ “2

heat-resistant material based on MgO 35 - ^{1 v} ' ^z

stands. The hardness after sintering is 50 R ₀ . The ^ee "" ·

However, sintered bodies have a specific gravity -

on, which is over 99% of the calculated specific Ge, ^{c en}

important is. ~ ^he

The sintered alloy is solution heat treated 30

subjected by heating to a temperature, at In the specified amount of Ti is also the excess the austenite predominates, for example from 760 to contain titanium, which is added and becomes with the 1165 ° C, and then air-cooled. bind free carbon and prevent it from doing so

After heating the alloy for 30 micro intended to pass into the matrix, utes at 815 ° C and air cooling to Raumtempera- 35 _R. . .,

The result was a Rockwell C hardness of about 48, Example ^

and the microstructure of the steel alloy base- Primary Carbide 65 volume percent TiC

mass was soft martensite. In this state, the basic mass leaves 35 percent by volume steel

the alloy can easily be made up of

Machine or grind measurements of the shape 40 percent by weight

fen. By cooling the alloy from the solution “. ^ ₁ .

temperature to room temperature in air becomes an i ,. ¹ "

Conversion to soft martensite achieved. A ^ i 15

Increase in size resulting from the conversion to ^ »'.,

Martensite has occurred, so does not present any difficulty- 45 H n \

because the sintered steel alloy is easy to remove. ⁿ J-

machined and then hardened, p ¹ . '

without a further increase in size occurring. The "^

Alloy undergoes precipitation hardening at an essentially

Temperature in the range of 260 to 650 ° C 3 hours 50 " ^e

"subjected to long and then overall air ^he

cools. The alloy solution annealed at 815 ° C showed ^it

after precipitation hardening at 438 ^° C. for 3 hours in this and in the following examples 4 to 7 and subsequent cooling in the air and 9 to 13 a hardness of 60 Rc. In a solution heat treatment at 55, a sufficient amount of TiH _{2 was added to} the Ge-1150 ° C and a precipitation hardening at 483 ° C was added to a compound of the titanium with the same alloy showed a higher hardness, namely the free carbon during sintering too selich of about 63 Rc. The advantage of hardening by secondary titanium carbide to allow heat treatment at the lower temperature (e.g. 260 to 650 ° C) is that 60 Example 4

Even with complicated designs, an essentially _{primary carbide 2} 5 percent by volume TiC

borrowed close tolerance of the dimensions adhered to the _{basic mass} 75 percent by volume steel

can be largely prevented and cracking

•will. consisting of

As mentioned above, it is important that the coal be 65 percent by weight

Amount of substance in the steel alloy containing nickel - Ni, 13

base mass is kept as low as possible, at- Co 8.5

for example less than 0.15 percent by weight of the basic Mo 4.5

Ti. Al. Mn Si .. Fe.

EXAMPLE 5

Primary carbide 40 volume percent TiC

Base mass 60 percent by volume steel

consisting of

Ni. Co. Mo Ti. Al. Fe-.

Weight percent

....

.... 20

.... in the

essential the rest

Example 6

Primary carbide 75 percent by volume TiC

Base mass 25 percent by volume steel

consisting of

Ni. . · Co.

Mo ■ Ti.

Al.

Mn - Si.; Fe.

For example, 1

^; Primary carbide 50 percent by volume TiC

Base mass 50 percent by volume steel

consisting of

Weight percent

·· ■ ■ ·· .. 21.5

; 6.5

4.5

0.4

0.1

in the

essential the rest

Example 8

Primary carbide 45 volume percent NbC

Base mass 55 percent by volume steel

Ni. Co. Mo Ti. Al-. Fe.

Weight percent consisting of

0.35 percent by weight

0.15 Ni 21.7

0.4 Co 8.49

0.1 5 Mo 3.42

in Ti 0.37

essential Fe *) im

borrowed

who borrowed

Rest ίο borrowed

the
rest

*) The rest of the iron contains small amounts of other components that do not have the new properties of the alloy affect.

During the production of the carbide tool steel mass, 800 g of NbC powder are pulverized with 1000 g steel-forming constituents corresponding to the above-mentioned composition of the steel alloy base mass mixed. The NbC powder has a total carbon content of 11.4%, correspondingly a total of 5% carbon in 1800 g of the powdered mixture. It's best in the interest Results desirable that the carbon content of the steel alloy matrix is 0.15, in particular Does not exceed 0.10 percent by weight. Since NbC often contains some free carbon and during still decompose after the treatment, thereby releasing a further small amount of free carbon can, which would normally pass into the steel alloy matrix, is preferably a other strong carbide former than molybdenum and Chromium, which is essentially insoluble as a carbide in the steel alloy matrix, is added. This is,

, 35 as already stated above, for example additional metallic titanium, in particular in the form of TiH ₂ , which releases reactive titanium for reaction with free carbon.
Assuming 45 percent by volume of NbC with a content of 11.4% bonded carbon and some free carbon, a sufficient weight proportion of z. B. TiH ₂ added to the mixture to make enough reactive titanium available to mix with the free carbon

, 45 combines and forms a secondary titanium carbide, and also to make an excess of 0.2 to 0.4% free titanium available for the steel alloy matrix. ,. _r .

This mixed amount of 18Ö0 g (800 g NbC and

■ 1000 g of steel-forming constituents) each becomes 1 g of paraffin wax Aufrlöö g of the mixture added, and that Mixture is made using Hejian. As a carrier Ground for 60 hours in a stainless steel loop mixer, half of them with stainless steel balls

, 55 is filling. After grinding, the mixture is processed as in Example 1 and solution-annealed.

After heating the sintered steel alloy to 815 ° C for 30 minutes and cooling in air to room temperature, it has a Rockwell C hardness of not more than 50, and the microstructure of the steel alloy matrix is again soft martensite.

The alloy is hardened to values of 60 Rc and above by precipitation hardening at a temperature in the range from 260 to 650 ^° C. for 3 hours and subsequent cooling in air. As stated above, it is important that the amount of carbon in the nickel-containing steel alloy matrix is as low as possible, for example below

909 526/265

Weight percent .... 18 .... 7.5 - _; .: .. 4,5 : .... 0, ύ5 ..-. ·. 0.15 .... 0.4 ■: .... 0.1 .... in ■ / ■;, ■■ essential ^ the, remainder-

0.15 percent by weight of the base mass. _{If TiH 2 is} omitted from the mixture when producing a similar heat-resistant sintered steel alloy, the hardness achieved after sintering alone is 57.8 Rc and the hardness after solution ^{heat treatment and after cooling from 1500 °} C. is 61.5 R _c . Since the free carbon was not bound, the hardness after the solution treatment rose significantly above 50 Rc and reached the value of 61.5 Rc.

Example 9

Primary carbide 65 volume percent VC

Basic mass ... 35 percent by volume steel

consisting of

Ni.
Co.
Mon
Ti.
Al.
Mn
Si ..
Fe.

Weight percent

.... 18

.... 0.65

.... 0.15

in the

essential the rest

consisting of

Example 13

Ni. Co. Mo C .. Ti. Al. Fe.

Weight percent

.... <0.15

0.2

.... in the

essentially the remainder Ni.
Co.
Mon
Ti.
Al.
Fe.

example

Primary carbide 25 volume percent TaC

Base mass 75 percent by volume steel

consisting of

Weight percent

13th

4.5

0.35

0.15

0.4

Ni. Co. Mo Ti. Al. Mn Si .. Fe.

in the

essential

borrowed

the.

rest

B e i s ρ i e 1

Primary carbide -. 40 percent by volume NbC

Base mass 60 percent by volume steel

consisting of

Weight percent

· 0.5

0.1

in the

essential the rest

example

Primary carbide -75 percent by volume NbC

Base mass 25 percent by volume steel

Ni -. Co. Mo Ti. Al. Fe.

Primary carbide 50 volume percent TaC

Base mass 50 percent by volume steel

consisting of

Weight percent

21.5

6.5

4.5

0.4

0.1

in the

essential

Rest.

The indication "remainder essentially iron" in the above examples does not exclude the presence of common iron companions and impurities such as calcium, boron, zirconium, as well as manganese and silicon or the like. Other components that may be present in the steel alloy matrix besides the main components are e.g. Example, up to 1 ° / o Mn up to 0.5% Si, biszu0, l% Ca, ₀ biszu0,17 B, up to 0.1 ° / ₀ Zr, etc. *. Other alloying ingredients in the steel alloy matrix Chromium, copper, tungsten, vanadium and niobium and others can be present in amounts that do not affect the new properties of the carbide tool steel.

In the production of the masses described above, the powder metallurgical process with mixing has been used the powdered ingredients, compressing the mixture into a desired shape, and then Sintering in a liquid phase or in a solid state at a high temperature for the purpose of attaining full compression has been found to be advantageous for the purposes of the invention.

In the broadest sense, this method consists in mixing an appropriate amount of steel-forming ingredients with an appropriate amount of the primary carbide, using a small amount of wax to give the freshly made compact sufficient strength, for example 1 g of wax per 100 g of mixture . The mixture can then be shaped in a variety of ways. It has proven advantageous to compress the mixture to a density of at least 50% of the nominal density at a pressure in the range from 1400 to 10700 at, preferably from 2100 to 7100 at and then in a vacuum, preferably below 300 μτα mercury column, im generally at a temperature above the melting point of the steel matrix, which depending on the alloy components present in the

Range from 1300 to 1575 ^° C., for a time sufficient to achieve the equilibrium between the primary carbide and steel alloy matrix and to obtain an essentially perfect densification, for example over 6 hours of sintering.

When the liquid phase sintering is complete, the product is left in the oven at room temperature cooling down. If necessary, the product as it comes from sintering undergoes mechanical cleaning subjected and then treated by solution heat treatment in the range from 760 to 1165 ° C and then to the Air cooled. It has been shown that a range from 760 to 982 ° C. is particularly advantageous. The solution heat treatment can be carried out at one temperature for a quarter of an hour or longer, for example 1 hour will.

In addition to the primary carbides TiC, VC, NbC and TaC, other carbides can also be present in amounts be that do not affect the tool steel, »o for example up to 25% zirconium carbide and the like, provided that they are in the steel alloy matrix are essentially insoluble. There can of course be such carbides alone or as total or partial solid solutions with the primary carbide must be present.

The sintered steel alloy according to the invention achieves the above-mentioned object in an exemplary manner. She subsides the solution heat treatment in any form, no matter how complicated it is. You can then at are hardened at a relatively low temperature without any significant degree of warping, Tearing or changes in volume occur. In contrast, a carbide steel with a Quenching hardenable steel matrix after hardening due to the increased volume, of throwing and the like. Another advantage of the invention is that the decarburization is not a problem, as the presence of carbon in to achieve the required hardening the steel alloy matrix is not required. The usual precautions for an accurate It is therefore not necessary to maintain the surrounding atmosphere during the heat treatment.

Claims (17)

45 claims: 1. Highly wear-resistant, machinable in the solution-annealed condition, precipitation hardenable by tempering, crack-free sintered steel alloy, characterized in that it is made of 20 up to 80 percent by volume carbides, among which at least one of the groups TiC, VC, NbC and TaC is located, and the remainder consists of a precipitation hardenable steel matrix, which is less as 0.15 percent by weight carbon, 10 to 30 percent by weight nickel, up to 25 percent by weight Cobalt, up to 10 percent by weight molybdenum, 0.2 to 9 percent by weight titanium, up to 5 percent by weight Aluminum, so that the sum of titanium and aluminum does not exceed 9%, the remainder being iron and has manufacturing-related impurities. 2. Alloy according to claim 1, characterized in that titanium is at least partially replaced by other strong carbide formers besides molybdenum and chromium in corresponding proportions, namely Vanadium, niobium and / or tantalum. 3. Alloy according to claim 1 or 2, characterized characterized in that titanium is at least partially replaced by zirconium in appropriate proportions. 4. Alloy according to one of the preceding claims, characterized in that the Carbide is in the form of primary carbide grains that have a soft martensitic microstructure having steel matrix are distributed. 5. Alloy according to one of claims 1 to 4, characterized in that the steel matrix 10 has up to 22 percent by weight nickel and at least 2 percent by weight each of cobalt and molybdenum and the sum of titanium and aluminum is less than 1.5 percent by weight. 6. Alloy according to one of claims 1 to 4, characterized in that the steel matrix has 18 to 30 percent by weight nickel and less than 2 percent by weight molybdenum and the sum of titanium and aluminum is more than 1.5 percent by weight. 7. Alloy according to claim 5, characterized in that the steel matrix is 2 to 10 percent by weight Cobalt, 2 to 8 weight percent molybdenum, and 0.2 to 1.4 weight percent titanium, and one additional amount of a carbide former other than molybdenum and chromium to bind free carbon having. 8. Alloy according to claim 7, characterized in that the steel matrix is 16 to 22 percent by weight Nickel, 6 to 10 weight percent cobalt, 2 to 6 weight percent molybdenum, 0.2 to 1 weight percent Titanium, up to 0.4 percent by weight aluminum and titanium as an additional carbide former. 9. Alloy according to claim 6, characterized in that the steel matrix is a sum of Titanium and aluminum not exceeding 9 percent by weight plus an additional amount of one Has carbide former apart from molybdenum and chromium to bind free carbon. 10. Alloy according to claim 9, characterized in that the nickel content is 24 to 30 percent by weight amounts to. 11. Alloy according to claim 6, characterized in that the nickel content is 18 to 24 percent by weight and the sum of titanium and aluminum are up to 3 percent by weight and that one additional amount of a carbide former other than molybdenum and chromium to bind free carbon is available. 12. Alloy according to one of claims 1 to 11, characterized in that the content of primary Carbide is 30 to 70 percent by volume (based on the total mass). 13. Alloy according to one of claims 1 to 12, characterized in that the primary carbide consists of titanium carbide. 14. Use of an alloy according to one of claims 1 to 13 for powder metallurgical production of tools, tool parts or machine elements that do not have any Suffering from delay, such as punching tools, drawing dies or the like. 15. Use of an alloy according to claim 14 for tools, tool parts or Machine elements that are exposed to heavy wear and tear and high temperatures. 16. Process for making an alloy according to one of claims 1 to 13, characterized in that that the powder mixture from the starting materials to a grain size of im Average less than about 5 to 7 μ ground, pressed and between 1300 and 1575 ° C in a vacuum sintered of less than 300 μ, followed by a solution heat treatment at between 760 and 1165 ° C with about half an hour or longer Holding time and air cooling is carried out, followed by the finishing of the sintered bodies and precipitation hardening by tempering between 260 and 650 ^° C. with a holding time of about 3 hours and air cooling. 17. The method according to claim 16, characterized in that at least part of the titanium content is introduced _{in the form of TiH 2.}