CN112281077A - Hob ring material of hard rock heading machine - Google Patents
Hob ring material of hard rock heading machine Download PDFInfo
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- CN112281077A CN112281077A CN201910660092.9A CN201910660092A CN112281077A CN 112281077 A CN112281077 A CN 112281077A CN 201910660092 A CN201910660092 A CN 201910660092A CN 112281077 A CN112281077 A CN 112281077A
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- 239000000463 material Substances 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 30
- 239000010959 steel Substances 0.000 abstract description 30
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 14
- 239000011651 chromium Substances 0.000 description 12
- 238000005496 tempering Methods 0.000 description 12
- 238000000137 annealing Methods 0.000 description 11
- 238000005242 forging Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000010955 niobium Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005641 tunneling Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010583 slow cooling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Forging (AREA)
Abstract
The invention discloses a material for a hob ring of a hard rock tunnel boring machine, wherein the hardness of the hob ring of the tunnel boring machine can reach HRC: 60-62, the component elements for manufacturing the shield machine cutter ring material comprise: 0.6 to 0.68wt% of C, 0.7 to 1.10wt% of Si, 0.20 to 0.50wt% of Mn, less than or equal to 0.03wt% of P, less than or equal to 0.02wt% of S, 6.00 to 7.00wt% of Cr, 2.00 to 2.80wt% of Mo, 0.90 to 1.20wt% of V, 0.15 to 0.25wt% of Nb, less than or equal to 0.25wt% of Cu, a proper amount of Re calculated, and the balance of Fe. The hob ring material of the hard rock heading machine is improved through material elements, the hardness of steel after heat treatment can reach HRC 60-62, the steel is neutral steel, and is arranged between cold-work die steel and hot-work die steel, the high hardness and the good wear resistance of the existing cold-work die steel are achieved, and meanwhile, the toughness of the hot-work die steel is achieved.
Description
Technical Field
The invention relates to the technical field of tunnel excavation equipment, in particular to a hob ring material of a hard rock heading machine.
Background
A hard rock tunnel boring machine TBM is a heavy equipment for excavating a tunnel, and its important part is a front-mounted hob ring (wearing part) which is in direct contact with rock. The machine rolls with the rock under a certain thrust until the rock is broken and then is transported out by a conveyor, thereby achieving the aim of tunneling.
Rock formations are generally divided into four types I, II, III and IV, wherein the types I and II belong to hard rock formations, and the high hardness HRC (Rockwell hardness) of the hobbing cutter ring is required to be more than 58 under the condition of wear resistance. The III and IV types belong to softer strata, the hardness is required to be available at about HRC55, with the rapid development of economic construction, whether the traffic is convenient or not directly restricts the development of economy, and the rapid and convenient traffic directly drives the rapid development of economy.
The existing tunnel excavation equipment in China commonly uses two TBM tunneling machines, the core parts of the two TBM tunneling machines are front raceway rings (wearing parts) which are in direct contact with rocks, the front raceway rings are rolled with the rocks under certain pressure to be crushed, and then the crushed rocks are transported out by a conveyor, so that the aim of tunneling is achieved, the hob rings of the two tunneling machines are required to have enough hardness and high wear resistance, and simultaneously the two tunneling machines commonly used in China are required to have high toughness, the hardness of the hob rings after heat treatment is lower than HRC52-55, when the two or more than two types of rocks such as basalt, rocky rock and granite are encountered, the serious edge piling and rapid wear scrapping of the hob rings are caused by insufficient hardness (HRC < 58), the engineering progress cannot be guaranteed, and the equipment wear consumption cost is higher.
Disclosure of Invention
The invention aims to provide a hob ring material of a hard rock heading machine, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the hard rock tunnel boring machine hob ring material is characterized in that the hardness of the shield boring machine hob ring can reach HRC: 60-62, the component elements for manufacturing the shield machine cutter ring material comprise: 0.6 to 0.68wt% of C, 0.7 to 1.10wt% of Si, 0.20 to 0.50wt% of Mn, less than or equal to 0.03wt% of P, less than or equal to 0.02wt% of S, 6.00 to 7.00wt% of Cr, 2.00 to 2.80wt% of Mo, 0.90 to 1.20wt% of V, 0.15 to 0.25wt% of Nb, less than or equal to 0.25wt% of Cu, a proper amount of Re calculated, and the balance of Fe.
Preferably, the shield machine cutter ring material comprises the following components in percentage by weight: 0.62 to 0.66wt% of C, 0.8 to 1.00wt% of Si, 0.30 to 0.45wt% of Mn, less than or equal to 0.02wt% of P, less than or equal to 0.01wt% of S, 6.20 to 6.80wt% of Cr, 2.20 to 2.60wt% of Mo, 0.95 to 1.10wt% of V, 0.15 to 0.25wt% of Nb, less than or equal to 0.25wt% of Cu, 0.02 to 0.05wt% of Re, and the balance of Fe.
Preferably, the shield machine cutter ring material comprises the following components in percentage by weight: 0.66wt% of C, 0.98wt% of Si, 0.38wt% of Mn, 0.016wt% of P, 0.001wt% of S, 6.31wt% of Cr, 2.2wt% of Mo, 1wt% of V, 0.15wt% of Nb, 0.06wt% of Cu, 0.05wt% of Re, and the balance of Fe.
Compared with the prior art, the invention has the beneficial effects that: the hob ring material of the hard rock heading machine is improved through material elements, the hardness of steel after heat treatment can reach HRC 60-62, the steel is neutral steel, and is arranged between cold-work die steel and hot-work die steel, the high hardness and the good wear resistance of the existing cold-work die steel are achieved, and meanwhile, the toughness of the hot-work die steel is achieved.
Detailed Description
The following embodiments are provided to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Regarding the hob ring with the mark H13 in the prior art, the hob ring is widely used, the typical components of the hob ring material are shown in the table 1, the hardness HRC52-55 after the steel is quenched and tempered by heat treatment is in the ten-degree tempering, when the steel meets I and II hard rocks in the using process, the grinding capability of the steel on the hard rocks is weak due to the lower hardness HRC which is approximately equal to 55, the steel causes rapid abrasion, and the piled edges are scrapped.
Table 1 prior art hob ring material is given the designation H13 typical composition as follows (%)
| Element(s) | C | Si | Mn | Cr | Mo | V | P | S |
| H13 | 0.40 | 1.00 | 0.40 | 5.00 | 1.40 | 1.00 | ≤0.030 | ≤0.030 |
The other is H13 modified steel number, the carbon content is slightly increased in H13 steel, so that the hardness of the H13 steel can reach HR 56-58 after heat treatment, the element components are shown in Table 2, the effect is better than that of H13 when the H13 meets III and IV soft rocks in the use process, but the use effect of the H13 is consistent with that of the H13 when the I and II rocks meet.
TABLE 2H 13 typical composition of modified steels is as follows (%)
| Element(s) | C | Si | Mn | Cr | Mo | V |
| H13+C | 0.50 | 1.00 | 0.40 | 5.00 | 1.40 | 1.00 |
In order to solve the problem that when a rock stratum of II types or above is encountered, the cutter ring is soft in hardness, a cold-work die steel Cr8Mo2VSi material test is adopted in the market, the element components are shown in Table 3, the hardness after heat treatment can reach HRC 61-63, the wear resistance is found in the using process, the grinding effect on the hard rock stratum is good, but the toughness is not fine enough, 40-30% of the cutter ring bounces the edge, and the cutter ring is individually broken.
Table 3 Cr8Mo2VSi material typical composition is as follows: (%)
| Element(s) | C | Si | Mn | Cr | Mo | V |
| Cr8Mo2VSi | 1.00 | 1.00 | 0.40 | 8.00 | 2.40 | 0.30 |
The new material of the invention has the following theoretical basis of component composition: the utility model provides a hard rock entry driving machine hobbing cutter circle material which characterized in that, the hardness of shield structure machine hobbing cutter circle can reach HRC: 60-62, the component elements for manufacturing the shield machine cutter ring material comprise: 0.6-0.68 wt% of C, 0.7-1.10 wt% of Si, 0.20-0.50 wt% of Mn, less than or equal to 0.03wt% of P, less than or equal to 0.02wt% of S, 6.00-7.00 wt% of Cr, 2.00-2.80 wt% of Mo, 0.90-1.20 wt% of V, 0.15-0.25 wt% of Nb, less than or equal to 0.25wt% of Cu, a proper amount of Re obtained by calculation, and the balance of Fe;
carbon (C) is a matrix element for ensuring the hardness of the material, the hardness of low-carbon steel can not meet the requirement, and the hardness of high-carbon steel can meet the requirement. The toughness is reduced along with the increase of carbon content, and the content of carbon C is preferably 0.60-0.68% by referring to related data and practice;
chromium (Cr) is a carbide forming element, exists in steel as Cr23C6 type carbide, the steel is heated to above 1100 ℃, the carbide of Cr is greatly dissolved into austenite, the hardenability of the steel is improved, the Cr is properly improved compared with H13, the oxidation resistance, the wear resistance and the corrosion resistance of the hot working process can be improved, and the Cr content is set to be 6.00-7.00%;
molybdenum (Mo) is a carbide-forming element, the main carbide is (Fe, Mo)6C exists, so that the hardenability of the steel can be improved, the secondary hardening effect during strengthening tempering can be obviously improved, meanwhile, Mo can also reduce the unevenness of eutectic carbide, so that the strength and toughness of the steel are improved, and the Mo is positioned by 2.00-2.80%;
vanadium (V) is also a carbide forming element, a small amount of V can refine crystal grains, more than 1.00 percent of V can be added to form VC with high hardness, secondary hardening can be caused strongly during tempering, tempering resistance of steel is improved, wear resistance is increased, and the content of V is determined to be 0.90 to 1.20 percent;
about 1 percent of silicon (Si) is added to strengthen the matrix and improve the tempering stability of the steel, and the Si content is 0.70 to 1.10 percent;
adding a proper amount of niobium (Nb) mainly for refining grains, and setting the Nb content to be 0.15-0.25% for improving toughness and processing performance;
the addition of a proper amount of rare earth (Re) elements can obviously improve the hot processing performance;
the balance being iron (Fe).
The material is made into a finished product after non-vacuum induction furnace, electroslag remelting, high-temperature tempering, forging, spheroidizing annealing, machining and vacuum heat treatment.
Example 1
The embodiment relates to preparation of a hob ring of a heading machine, which comprises the following steps:
1. smelting process, wherein a non-vacuum induction furnace is added with slag for remelting, and the chemical components conform to the table 4;
2. the forging process comprises the steps of charging at a temperature of less than or equal to 750 ℃, preheating for 1 hour at 780-800 ℃, and heating; heating temperature is 1120-1150 ℃, initial forging temperature is 1100-1140 ℃, final forging temperature is more than or equal to 900 ℃, slow cooling (sand cooling or pit cooling) is carried out after forging, and spheroidizing annealing is carried out in time;
3. annealing process, namely spheroidizing annealing at 840-860 ℃ for 2-4 h, furnace cooling to 730-750 ℃ for 5-6 h, cooling to 500 ℃ and discharging for air cooling, wherein the hardness HB after annealing is less than or equal to 241, and the crystallinity is more than or equal to grade 6;
4. semi-finishing according to the drawing, and reserving allowance for the inner diameter;
5. vacuum heat treatment, preheating at 600 ℃ for 2H, preheating at 850 ℃ for 1.5H, preheating at 1100 +/-20 ℃ for 1H for quenching, tempering at 540 ℃ for 4H for air cooling, and twice tempering and cooling for 10 ℃ for the second time;
the cutter ring is manufactured by trial according to the technical scheme, and the obtained product detection data are shown in a table 4.
Table 4 data on the examination of articles of the material of the invention
| C | Si | Mn | P | S | Ni | Cr | Mo | W | V | Cu |
| 0.66 | 0.98 | 0.38 | 0.016 | 0.001 | 0.20 | 6.31 | 2.10 | 0.52 | 0.99 | 0.06 |
The hardness of the material is stabilized between HRC 60-62 after non-vacuum induction furnace, electroslag remelting, high-temperature tempering, forging, spheroidizing annealing, machining and vacuum heat treatment.
And 3, field test report data of III-standard projects of three ABH water delivery tunnels in Xinjiang in 2019.
Example 2
The embodiment relates to preparation of a hob ring of a heading machine, which comprises the following steps:
1. smelting process, wherein a non-vacuum induction furnace is added with slag for remelting, and the chemical components conform to the table 5;
2. the forging process comprises the steps of charging at a temperature of less than or equal to 750 ℃, preheating for 1 hour at 780-800 ℃, and heating; heating temperature is 1120-1150 ℃, initial forging temperature is 1100-1140 ℃, final forging temperature is more than or equal to 900 ℃, slow cooling (sand cooling or pit cooling) is carried out after forging, and spheroidizing annealing is carried out in time;
3. annealing process, namely spheroidizing annealing at 840-860 ℃ for 2-4 h, furnace cooling to 730-750 ℃ for 5-6 h, cooling to 500 ℃ and discharging for air cooling, wherein the hardness HB after annealing is less than or equal to 241, and the crystallinity is more than or equal to grade 6;
4. semi-finishing according to the drawing, and reserving allowance for the inner diameter;
5. vacuum heat treatment, preheating at 600 ℃ for 2H, preheating at 850 ℃ for 1.5H, preheating at 1100 +/-20 ℃ for 1H for quenching, tempering at 540 ℃ for 4H for air cooling, and twice tempering and cooling for 10 ℃ for the second time;
the cutter ring is manufactured by trial according to the technical scheme, and the obtained product detection data are shown in a table 5.
TABLE 5 data on the examination of articles of the material of the invention
| C | Si | Mn | P | S | Ni | Cr | Mo | W | V | Cu |
| 0.62 | 1.02 | 0.36 | 0.02 | 0.009 | 0.20 | 6.52 | 2.00 | 0.48 | 1.03 | 0.04 |
The hardness of the material is stabilized between HRC 60-62 after slag remelting, high-temperature tempering, forging, spheroidizing annealing, machining and vacuum heat treatment in a non-vacuum induction furnace.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a hard rock entry driving machine hobbing cutter circle material which characterized in that, the hardness of shield structure machine hobbing cutter circle can reach HRC: 60-62, the component elements for manufacturing the shield machine cutter ring material comprise: 0.6 to 0.68wt% of C, 0.7 to 1.10wt% of Si, 0.20 to 0.50wt% of Mn, less than or equal to 0.03wt% of P, less than or equal to 0.02wt% of S, 6.00 to 7.00wt% of Cr, 2.00 to 2.80wt% of Mo, 0.90 to 1.20wt% of V, 0.15 to 0.25wt% of Nb, less than or equal to 0.25wt% of Cu, a proper amount of Re calculated, and the balance of Fe.
2. The material for the hob ring of the hard rock heading machine according to claim 1, wherein: the shield machine cutter ring material comprises the following components: 0.62 to 0.66wt% of C, 0.8 to 1.00wt% of Si, 0.30 to 0.45wt% of Mn, less than or equal to 0.02wt% of P, less than or equal to 0.01wt% of S, 6.20 to 6.80wt% of Cr, 2.20 to 2.60wt% of Mo, 0.95 to 1.10wt% of V, 0.15 to 0.25wt% of Nb, less than or equal to 0.25wt% of Cu, 0.02 to 0.05wt% of Re, and the balance of Fe.
3. The material for the hob ring of the hard rock heading machine according to claim 1, wherein: the shield machine cutter ring material comprises the following components: 0.66wt% of C, 0.98wt% of Si, 0.38wt% of Mn, 0.016wt% of P, 0.001wt% of S, 6.31wt% of Cr, 2.2wt% of Mo, 1wt% of V, 0.15wt% of Nb, 0.06wt% of Cu, 0.05wt% of Re, and the balance of Fe.
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| CN201910660092.9A CN112281077A (en) | 2019-07-22 | 2019-07-22 | Hob ring material of hard rock heading machine |
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| CN201910660092.9A CN112281077A (en) | 2019-07-22 | 2019-07-22 | Hob ring material of hard rock heading machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117051330A (en) * | 2023-08-04 | 2023-11-14 | 威海天润新材料科技有限公司 | Steel for tunnel excavator hob ring for extremely hard rock and preparation method thereof |
Citations (3)
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|---|---|---|---|---|
| CN1422972A (en) * | 2002-12-18 | 2003-06-11 | 江汉石油钻头股份有限公司 | High-strength alloy tool steel |
| CN103276298A (en) * | 2013-06-09 | 2013-09-04 | 河冶科技股份有限公司 | High-hardness high-tenacity cold and hot work die steel and production method thereof |
| CN105950996A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Shield tunneling machine cutter ring material technology |
-
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- 2019-07-22 CN CN201910660092.9A patent/CN112281077A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422972A (en) * | 2002-12-18 | 2003-06-11 | 江汉石油钻头股份有限公司 | High-strength alloy tool steel |
| CN103276298A (en) * | 2013-06-09 | 2013-09-04 | 河冶科技股份有限公司 | High-hardness high-tenacity cold and hot work die steel and production method thereof |
| CN105950996A (en) * | 2016-06-20 | 2016-09-21 | 安徽省瑞杰锻造有限责任公司 | Shield tunneling machine cutter ring material technology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117051330A (en) * | 2023-08-04 | 2023-11-14 | 威海天润新材料科技有限公司 | Steel for tunnel excavator hob ring for extremely hard rock and preparation method thereof |
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