CN1014081B - Low alloy high speed steel - Google Patents
Low alloy high speed steelInfo
- Publication number
- CN1014081B CN1014081B CN 90103207 CN90103207A CN1014081B CN 1014081 B CN1014081 B CN 1014081B CN 90103207 CN90103207 CN 90103207 CN 90103207 A CN90103207 A CN 90103207A CN 1014081 B CN1014081 B CN 1014081B
- Authority
- CN
- China
- Prior art keywords
- steel
- present
- speed steel
- high speed
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The present invention belongs to the field of low-alloy high-speed steel, which is applicable to the field of common high-speed tool steel. The steel of the present invention is produced by the following processes: alloy element content is reduced on the basis of common high-speed steel, Si element content is increased, and N element is added. The processes aim to make the steel of the present invention obtain high secondary hardening and make the cost and the energy consumption of the fabrication technology decreased. All the performance of the steel in the present invention is not lower than that of the common high-speed steel, and some performance is superior to that of the common high-speed steel.
Description
The invention belongs to the low-alloy high-speed steel field.Be applicable in the universal rapid tool steel field.
High alloy content in the rapid tool steel, the needs that are considered to form enough quenching undissolved carbides always He the martensitic matrix of very strong age hardening effect is arranged.And the restriction low because of performance and that be subjected to use range of low-alloy high-speed steel and semi-high speed steel fails to obtain to widely apply.By the rapid steel type that people adopted universal rapid steel and U.S. Pat 3012879 and Japan special permission communique JP57-73167(A are arranged at present) etc. steel grade.Though these type rapid steel use propertieies are better, but the topmost shortcoming universal rapid steel that is high alloy is because of alloying constituent content height, and the manufacturing condition of such steel grade is harsh, and energy loss is bigger, lumber recovery is low etc., so the cost of the type rapid steel is very expensive.
The purpose of this invention is to provide that a kind of to have an alloy content low, and performance is not less than universal rapid steel, cost and energy consumption are low, and the high universal low alloy high speed steel material of lumber recovery.
According to purpose of the present invention, all the other are Fe to the concrete chemical ingredients that we design a kind of low alloy high speed steel for (weight %) C 0.85-1.05% W 3.0-5.0% Mo 2.0-3.5% Cr 3.5-5.0% V1.20-1.80% Si 0.70-1.20 Mn 0.20-0.50% N 0.02-0.08% S≤0.03% P≤0.03%.
W, Mo are necessary composition in low alloy high speed steel of the present invention, they and C form carbide, can refinement steel crystal grain and when quenching solid solution separate out utmost point disperse and tiny alloy carbide in matrix and in drawing process, make steel of the present invention obtain very high secondary hardness.Because W, Mo and C have very strong bonding force, so improved martensitic pyrolytic decomposition stability, make steel of the present invention still can keep martensitic properties of crystal lattice under comparatively high temps.Because difficult gathering of the alloy carbide of W, Mo grows up, make steel of the present invention still keep the carbide small and dispersed in the time of about 600 ℃ again, promptly the high temperature resistance softening power is strong.Tungsten equivalent in the universal high speed steel (W+2Mo) % all 〉=14%, and (W+2Mo) all is lower than 10% in the steel of the present invention, its objective is and reduce that part of content that W, Mo form primary carbide, but guarantee that matrix secondary hardening and high-temperature behavior to the requirement of W, Mo, make steel of the present invention have higher quenching, tempered-hardness and high-temperature behavior.Therefore in steel of the present invention, add 3.0-5.0%W and 2.0～3.5%Mo.
Because rapid steel be rely on a large amount of once, proeutectoid carbide guarantees high rigidity, high-wearing feature and the high high-temperature behavior of steel.Carbon content is low excessively, can not bring into play the effect of each alloying element in the steel, and age hardening effect is poor.The carbon amount is too high, then easily separates out M in the steel
3C type carbide also causes the quenching overheating tendency of steel to increase.Carbon content fixes on 0.85-1.05%C in steel of the present invention, its objective is steel interalloy element is played one's part to the full, and makes under the situation of alloying element far below the universal high speed steel, can obtain the secondary hardness a little more than the universal high speed steel.
The bonding force of vanadium and carbon is very big, forms face-centred cubic gap phase, and this class carbide is very stable.The VC not molten part of quenching is the important factor of the wear resistance that guarantees that the quenching structure grain refining is become reconciled.The VC that separates out when quenching solid solution and tempering can strengthen the secondary hardening of steel greatly, but the too high levels of vanadium can worsen the grindability of steel.Therefore content of vanadium is 1.20～1.80%V in steel of the present invention.
Chromium role in steel of the present invention is to improve the hardening capacity and the tempered-hardness of steel, and increases anti-oxidant and resistance to corrosion, but the Cr too high levels, then the thermoplasticity to steel has disadvantageous effect, and steel chromium content of the present invention is 3.5-5.0%Cr.
Si removes as harmful element as far as possible in the universal high speed steel, and Si adds as a kind of alloying element in steel of the present invention, adds the Si amount and is 0.8-1.20%.Add an amount of silicon at steel interalloy content of the present invention under far below the situation of universal high speed steel, near the carbide of can refinement separating out the sclerosis peak and increase the quantity of the carbide of separating out in the drawing process and help the stability of quenching tempering property, the tempering fluctuation range is little, is easy to control and produces.Can improve the thermoplasticity of steel ingot and the toughness of steel, can increase the solid solution capacity of matrix interalloy element when quenching, help to improve the hardness and the high-temperature behavior of matrix.Because add an amount of Si in steel of the present invention, the temper number of quenching can reach HRC65-66.5.Improve about HRC0.5 than universal high speed steel hardness value.
In steel of the present invention, add 0.02-0.08%N, its objective is and utilize tiny N and the compound of C, when quenching, be difficult for growing up with the crystal grain that guarantees steel.Make the steel can be, thereby guarantee solid solution alloying element as much as possible in the quenching matrix at higher quench hot.Produce maximum age hardening effect, maintain again simultaneously than compact grained tissue and toughness preferably.
The production method of steel of the present invention can adopt electric furnace, esr or medium-frequency induction furnace to smelt, then steel ingot is forged or roll forming, forge, roll temperature, finish-forging, roll temperature and be not less than 900 ℃ greater than 1100 ℃, the heat-treatment quenching temperature is 1100 ℃～1200 ℃, and tempering temperature is 560 ℃.
The various products and the prior art that adopt low alloy high speed steel of the present invention to produce compare, and have following characteristics.
1. adopt steel of the present invention and prior art to compare, because of its alloy content of steel of the present invention is low, one ton of steel of then every production about 3000 yuan of cost that can save material.
2. steel of the present invention is less because of containing the high melting point alloy element, and elements such as Si, C are higher, and then the furnace charge burn-off rate is fast when smelting, and fluidity molten steel is good, and tapping temperature is low.Hot processing temperature is lower than about 20 ℃～50 ℃ in universal rapid steel.The thermal processing distortion drag is little, and plasticity is good, and the forging rolling lumber recovery is higher than universal rapid steel, therefore can cut down the consumption of energy greatly, improves output, reduces cost.
Embodiment
Steel of the present invention is to adopt medium-frequency induction furnace to smelt, and in order to contrast conveniently, we have smelted the rapid steel of five stove heterogeneities simultaneously, and A, B, C are low-alloy high-speed steel of the present invention, and D, E are the universal rapid steel of contrast, and its concrete chemical ingredients sees Table 1.Steel ingot is heat-treated after forging, rolling again, and the performance perameter of system of heat treatment process and each steel of processing back sees Table 2.
According to above-mentioned performance comparison, low alloy high speed steel of the present invention on the basis of saving cost and cutting down the consumption of energy, still can reach universal rapid steel performance index, and increase.Steel of the present invention is being made aspect the dissimilar products, can meet or exceed the level of universal high speed steel too.
Claims (1)
1, a kind of low alloy high speed steel is characterized in that the concrete chemical ingredients of this steel grade is (weight %) C0.85-1.05% W3.0-5.0% Mo 2.0-3.5% Cr3.5-5.0% V1.20-1.80% Si0.70-1.20% Mn 0.20-0.50% N0.02-0.08% S≤0.03% P≤0.03%; All the other are iron Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103207 CN1014081B (en) | 1990-07-03 | 1990-07-03 | Low alloy high speed steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90103207 CN1014081B (en) | 1990-07-03 | 1990-07-03 | Low alloy high speed steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049189A CN1049189A (en) | 1991-02-13 |
| CN1014081B true CN1014081B (en) | 1991-09-25 |
Family
ID=4877972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90103207 Expired CN1014081B (en) | 1990-07-03 | 1990-07-03 | Low alloy high speed steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1014081B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413992C (en) * | 2006-01-25 | 2008-08-27 | 周向儒 | High-speed steel and heat treatment technique thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004285444A (en) * | 2003-03-24 | 2004-10-14 | Daido Steel Co Ltd | Low-alloy high-speed tool steel showing stable toughness |
| CN1873039A (en) * | 2005-05-31 | 2006-12-06 | 大连荣创科技发展有限公司 | High carbon, silicon contained high-speed steel in superhard, and high toughness |
| CN118326280A (en) * | 2024-02-29 | 2024-07-12 | 上海皎燕科技有限公司 | Novel material of inner ring of low-cost high-performance back lining bearing and heat treatment process thereof |
-
1990
- 1990-07-03 CN CN 90103207 patent/CN1014081B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413992C (en) * | 2006-01-25 | 2008-08-27 | 周向儒 | High-speed steel and heat treatment technique thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049189A (en) | 1991-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102912236B (en) | High-performance and abrasion-resistant hot work die steel and technology for manufacturing same | |
| CN106086678B (en) | High life bearing steel material and its processing method | |
| CN104120364B (en) | Modified cast steel of a kind of rocker arm of coal mining machine alloy and preparation method thereof | |
| CN109457081B (en) | Rare earth microalloyed bearing steel and preparation method thereof | |
| CN107974636A (en) | A kind of high rigidity high-hardenability pre-hardening plastic die steel and preparation method thereof | |
| JPS60194047A (en) | High quality bearing steel and its production | |
| CN101078090A (en) | Low-alloy high speed steel roll material and preparation method thereof | |
| CN102373376B (en) | High-silicon high-manganese hot-work die steel and preparation method thereof | |
| CN109763066B (en) | Heat-resistant steel for key hot end component of ultrahigh parameter steam turbine | |
| CN107557699A (en) | A kind of hot die steel and preparation method thereof | |
| CN102383044B (en) | Multicomponent high speed steel used for preparing roller | |
| CN112322970A (en) | High-chromium steel composite roll collar and manufacturing method thereof | |
| CN110408835A (en) | Rare-earth type microalloying high carbon martensite stainless steel and preparation method thereof | |
| CN1876880A (en) | Cold-work die steel for high speed stamping | |
| CN101538685B (en) | High-toughness ductile blade steel and metallurgical manufacturing method thereof | |
| CN105970109A (en) | High-performance hot work steel and preparation method thereof | |
| CN100469936C (en) | High-performance low-alloy niobium-contained high-speed steel | |
| CN1080327A (en) | Low-alloyed ball mill wearing liner plate and manufacturing process | |
| JPH083720A (en) | Parts made of steel excellent in rolling fatigue life and its production | |
| CN113652606A (en) | High-hardness high-toughness wear-resistant steel ball and preparation method thereof | |
| CN1021974C (en) | Low cobalt superhard high speed steel | |
| CN1014081B (en) | Low alloy high speed steel | |
| CN101311289B (en) | Steel for stamping die and method of manufacture | |
| CN104480400B (en) | A kind of C-N-B composite hardening high wear-resisting cold process mould steel | |
| CN113897537A (en) | Wear-resistant steel ball with long service life and casting process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |