MXPA98008461A - Article of high-speed steel, of pulvimetalurgia, of alta dur - Google Patents
Article of high-speed steel, of pulvimetalurgia, of alta durInfo
- Publication number
- MXPA98008461A MXPA98008461A MXPA/A/1998/008461A MX9808461A MXPA98008461A MX PA98008461 A MXPA98008461 A MX PA98008461A MX 9808461 A MX9808461 A MX 9808461A MX PA98008461 A MXPA98008461 A MX PA98008461A
- Authority
- MX
- Mexico
- Prior art keywords
- article according
- article
- vanadium
- molybdenum
- tungsten
- Prior art date
Links
- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 14
- 229910052803 cobalt Inorganic materials 0.000 claims abstract description 9
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 9
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 8
- 239000010941 cobalt Substances 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 8
- 239000011733 molybdenum Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000000137 annealing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 description 18
- 239000000956 alloy Substances 0.000 description 18
- 238000005496 tempering Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 4
- 241000690470 Plantago princeps Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 125000000998 L-alanino group Chemical group [H]N([*])[C@](C([H])([H])[H])([H])C(=O)O[H] 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003466 anti-cipated Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
The present invention relates to a high speed steel article produced by powder metallurgy having a combination of high hardness and wear resistance, particularly at elevated temperatures. This combination of properties is obtained by the combination of W, Mo, V and Co. The article is particularly suitable for use in the manufacture of garment cutting tools, such as punches, and surface coatings.
Description
ARTICLE OF HIGH-SPEED STEEL, OF PtTLVTMETALURGIA, OF HIGH PURITY
BACKGROUND OF THE INVENTION
The invention relates to a high-speed steel article produced by powder metallurgy characterized by high hardness and wear resistance, particularly at elevated temperatures, suitable for use in the manufacture of garment cutting tools, such as punches and other applications of tools that require a very high wear resistance. In tool applications that require high hardness and wear resistance where the tool during use is subjected to elevated temperatures exceeding approximately 538 ° C (1000 ° F) and up to eg 649 ° C (1200 ° F), it is Typical use carbide material for the manufacture of these tools. However, the carbide material has the important disadvantage of being difficult to machine the desired tool configurations, particularly on intricate cutting surfaces, and is characterized by a relatively poor toughness, which makes the fabricated tool thereof susceptible to fractures and devastated during its use. In these applications, it is desirable to use high speed steels, instead of REF. 28617 carbide materials, because high speed steels are easier to machine to the desired tool configuration and show a much greater toughness than carbide materials. High speed steels have not been used in these applications, however, because they do not show the necessary hardness and therefore wear resistance, at high temperatures at which conventional carbide tools are used. Accordingly, it is an object of the present invention to provide a high speed steel article produced by powder metallurgy, useful for the production of garment cutting tools, such as punches and other tool applications that require high wear resistance. The material must be able to maintain a high hardness at high temperatures anticipated in the applications of carbide cutting tools and still have the benefit of high speed steels from the point of view of toughness and machinability.
BRIEF DESCRIPTION OF THE INVENTION
The invention relates generally to a high speed steel article produced by powder metallurgy of compacted high speed steel powder particles. Steel consists essentially, in percent by weight, of 2.4 to 3.9 of carbon, up to 0.8 of manganese, to 0.8 of silicon, 3.75 to 4.75 of chromium, 9.0 to 11.5 of tungsten, 4.75 to 10.75 of molybdenum, 4.0 to 10.0 of vanadium and 8.5 to 16.0 cobalt, with 2.0 to 4.0 of niobium that is selectively present, and the rest is iron and incidental impurities. The following are the preferred and most preferred high speed steel compositions, in percent by weight, according to the invention:
The article according to the invention may have a minimum hardness of 70 Rc in the condition as it is cooled and tempered, and preferably a minimum hardness of 61 Rc after tempering at 649 ° C (1200 ° F). Preferably, the minimum hardness in the condition as it is cooled and tempered may be 72 Rc. Preferably, the hardness after tempering at 649 ° C (1200 ° F) may be 63 Rc. The article according to the invention may be in the form of a press cutting tool, such as a punch, or a surface coating on a substrate.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a graph showing the tempering response of alloys according to the invention, compared to alloys produced by conventional powder metallurgy; and Figure 2 is a graph showing the hot hardness of alloys according to the invention compared to alloys produced by conventional powder metallurgy.
DESCRIPTION OF THE PREFERRED MODALITIES
As a demonstration of the invention, articles produced by powder metallurgy for testing are produced with the alloy compositions, in weight percent, which are set forth in Table 1.
•
• •
The test articles, the compositions of which are set forth in Table 1, are produced by conventional powder metallurgy practices including the production of prealloyed powder by atomization of nitrogen gas followed by full density consolidation by hot isostatic compaction. The samples in Table 1 were austenitized, cooled in oil and quenched four times, each time for two hours, at temperatures shown in Table 2. They were then tested to measure hardness after tempering at these temperatures. The wear resistance was determined, as reported in table 3, by means of mandrel abrasion tests and transversal cylinder test. The fracture resistance to bending and the tenacity of Charpy C notch impasto were determined in longitudinal and transverse samples after heat treatment using the hardening and tempering temperatures given in table 3.
• •
I
H O I
- -
I H t I
The alloys Ala to Aid, A2a to A2e and A3a to A3C are alloy compositions according to the invention. As can be seen from the tempering response data set forth in Table 2 and graphically represented in Figure 1, the alloys of the Al, A2 and A3 series according to the invention show superior hardness and tempering temperatures of up to 649 ° C (1200 ° F) in relation to existing commercial alloys. Similarly, as shown in Table 3, the samples Ale, A2a, A2d and A3a according to the invention also show excellent wear resistance determined by the mandrel abrasion and the results of the cross cylinder test. Of these alloys of the invention, Al alloy shows the optimum combination of tempering response and wear resistance. The A2 alloys show a slightly lower hardness after hardening at 649 ° C
(1200 ° F), but some improved tenacity and a resistance to bending fracture compared to alloys
Al. However, of all the alloys of the invention, as shown in table 3 and figure 1, show improved combinations of tempering response, toughness and wear resistance with respect to existing commercial alloys.
• •
I
Table 4 and Figure 2 indicate the hot hardness values for alloys Ale, A2d, A2c and A3a, according to the invention, compared to the existing commercial alloy (REX 76). As can be seen from these data, all of the alloys according to the invention show an improved hot hardness at elevated temperatures of up to 704 ° C (1300 ° F), compared to the existing commercial alloy. All compositions stated in the specification are in percent by weight, unless otherwise indicated. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, property is claimed as contained in the following:
Claims (15)
1. A high speed steel article produced by powder metallurgy, of compacted high speed steel particles, characterized in that it consists essentially, in percent by weight, of 2.4 to 3.9 carbon, up to 0.8 of manganese, up to 0.8 of silicon, 3.75 a 4.75 of chromium, 9.0 to 11.5 of tungsten, 4.75 to 10.75 of molybdenum, 4.0 to 10.0 of vanadium and 8.5 to 16.0 of cobalt, with 2.0 to 4.0 of niobium selectively present, and the rest is iron and incidental impurities.
2. The article according to claim 1, characterized in that it has 2.6 to 3.5 carbon, 3.75 to 4.75 chromium, 9.0 to 11.5 tungsten, 9.5 to 10.75 molybdenum, 4.0 to 6.0 vanadium, 2 to 4 niobium and 14.0 to 16.0 cobalt.
3. The article according to claim 2, characterized in that it has 3.0 to 3.3 carbon, maximum 0.5 manganese, maximum 0.5 silicon, 4.2 to 4.6 chromium, 10.5 to 11.0 tungsten, 10.0 to 10.5 molybdenum, 5.0 to 5.5 of vanadium, 2.8 to 3.2 of niobium and 14.5 to 15.0 of cobalt.
4. The article according to claim 1, characterized in that it has 2.4 to 3.2 carbon, 3.75 to 4.
5 of chromium, 9.75 to 10.75 of tungsten,
6. 75 to 8.25 of molybdenum, 5.0 to 7.0 of vanadium and 13.0 to 15.0 of cobalt. 5. The article according to claim 4, characterized in that it has 2.9 to 3.10 of carbon, maximum 0.5 of manganese, maximum 0.5 of silicon, 3.9 to 4.2 of chromium, 10.0 to 10.5 of tungsten, 7.25 to 7.75 of molybdenum, 6.0 to 6.5 of vanadium and 14.0 to 14.5 of cobalt. 6. The article according to claim 1, characterized in that it has 2.9 to 3.9 carbon, 3.75 to 4.5 of chromium, 9.5 to 11.0 of tungsten, 4.75 to 6.0 of molybdenum, 8.5 to 10.0 of vanadium and 8.5 to 10.0 'of cobalt .
7. The article according to claim 6, characterized in that it has 3.2 to 3.6 carbon, maximum 0.5 manganese, maximum 0.5 silicon, 3.9 to 4.2 chromium, 10.0 to 10.5 tungsten, 5 to 5.5 molybdenum, 9.0 a 9.5 of vanadium and 9.0 to 9.5 of cobalt.
8. The article according to claims 1, 2,, 3, 4, 5, 6, 7, or 8, characterized in that it has a minimum hardness of 70 Rc in the condition as it is cooled and tempered.
9. The article according to claims 1, 2, 3, 4, 5, 6, or 8, characterized in that it has a minimum hardness of 70 Rc in the condition as it cools and a minimum hardness of 61 Rc after annealing to 649 ° C (1200 ° F).
10. The article according to claim 8, characterized in that the minimum hardness is 72 Rc.
11. The article according to claim 9, characterized in that the minimum hardness after hardening at 649 ° C (1200 ° F) is Rc 63.
12. The article according to claim 8, characterized in that it is in the form of a tool for cutting garments.
13. The article according to claim 9, characterized in that it is in the form of a tool for cutting garments.
14. The article according to claim 8, characterized in that it is in the form of a surface coating on a substrate.
15. The article of conformity is claim 9, characterized in that it is in the form of a surface coating on a substrate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08949497 | 1997-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98008461A true MXPA98008461A (en) | 2000-02-02 |
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