CN1847435A - Super high strength hot rolled steel bar for mine resin roof bolt - Google Patents
Super high strength hot rolled steel bar for mine resin roof bolt Download PDFInfo
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- CN1847435A CN1847435A CN 200610044183 CN200610044183A CN1847435A CN 1847435 A CN1847435 A CN 1847435A CN 200610044183 CN200610044183 CN 200610044183 CN 200610044183 A CN200610044183 A CN 200610044183A CN 1847435 A CN1847435 A CN 1847435A
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- steel bar
- roof bolt
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- rolled steel
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Abstract
The present invention relates to one kind of super high strength hot rolled steel bar for mine resin roof bolt. The steel bar has yield strength not lower than 600 MPa, tensile strength not lower than 800 MPa, elongation not lower than 18% and normal temperature ballistic work not lower than 20 J. Chemically, it consists of C 0.25-0.28 wt%, Mn 1.40-1.55 wt%, Si 0.40-0.60 wt%, V 0.14-0.16 wt%, S not more than 0.020 wt%, P not more than 0.020 wt%, residual elements including Cr not more than 0.10 wt%, Ni not more than 0.10 wt%, Cu not more than 0.10 wt% and Cr+Ni+Cu not more than 0.20 wt%, except Fe and inevitable impurity. The present invention makes it possible to lower the resin roof bolt support density of coal mine, raise the support effect and raise operating efficiency.
Description
Technical field
The present invention relates to a kind of rod body material---super high strength hot rolled steel bar for mine resin roof bolt that is used for the colliery shaft and drift supporting with resin anchor.
Background technology
At present, known hot rolled steel bar for mine resin roof bolt, its yield strength is not more than 500MPa, and tensile strength is not more than 660MPa, causes support density big, and supporting effect is poor, and operating efficiency is low.
Summary of the invention
The objective of the invention is provides a kind of novel rod body material---super high strength hot rolled steel bar for mine resin roof bolt for resin anchor.Anchor pole uses material of the present invention, can reduce the density of shaft and drift supporting, improves supporting effect: improve operating efficiency.
For achieving the above object, the technical solution used in the present invention is: according to the requirement of the physicals of present 500MPa high strength anchor bar, with reference to superfine high-quality steel, determine physicals of the present invention and chemical ingredients.Yield strength σ of the present invention
s〉=600MPa, tensile strength sigma
b〉=800MPa, unit elongation δ
5〉=18%, normal temperature ballistic work A
KV〉=20J.Chemical ingredients of the present invention is by weight:
C：0.25～0.28％、Mn：1.40～1.55％、Si：0.40～0.60％、
V：0.14～0.16％；S：≤0.020％、 P：≤0.020％；
Residual element: Cr≤0.10%, Ni≤0.10%, Cu≤0.10%, and Cr+Ni+Cu≤0.20%; All the other are Fe and unavoidable impurities.
Chemical ingredients of the present invention is according to the requirement of the physicals of 500MPa high strength anchor bar at present, determines with reference to superfine high-quality steel.The main chemical compositions of present 22 specification 500MPa High strength bolt: C 0.21～0.25%, Si 0.40～0.60%, Mn 1.40～1.60%, V 0.09～0.12%, physicals: yield strength σ
sBe 545～580MPa, tensile strength sigma
bBe 680～735MPa, unit elongation δ
5Be 23～26%, by 22 specification HRB400 Ribbed Bar chemical ingredientss and physicals are carried out regression analysis, 0.01% C influences yield strength and is about 10～12MPa, almost injures intensity all properties in addition owing to increase the C amount, should reduce its content as far as possible under the proof strength prerequisite; C in V and the steel, N very easily form V (CN) compound, play very strong precipitation precipitation strength effect, so adopt the V microalloying to improve the intensity of anchor pole reinforcing bar, by 22 specification HRB400 and HRB335 Ribbed Bar chemical ingredients and physicals are carried out regression analysis, 0.01% V influences yield strength and is about 12～14MPa.
Because yield strength of the present invention, tensile strength all are better than former hot rolling mine resin roof bolt steel and intensity improves the needs that performance index such as back unit elongation, ballistic work can satisfy coal roadway support, therefore, the anchor pole of producing with these steel is when shaft and drift supporting, can reduce the support density of colliery roadway resin anchor, improve supporting effect, improve operating efficiency.
Embodiment
Surface of the present invention and cross-sectional shape are: the vertical rib of nothing, cross rib are one-way spiral (being generally left-handed), rib shape is the crescent moon rib, cross rib side and rebar surface angle α ≮ 45 °, the axial angle β of cross rib and reinforcing bar ≮ 45 °, 20% of the gap summation ≯ reinforcing bar nominal girth on the relative two sides between the cross rib end.Yield strength σ of the present invention
s〉=600MPa, tensile strength sigma
b〉=800MPa, unit elongation δ
5〉=18%, normal temperature is gone out merit A
KV〉=20J.Chemical ingredients of the present invention is by weight:
C：0.25～0.28％、Mn：1.40～1.55％、Si：0.40～0.60％、
V：0.14～0.16％；S：≤0.020％、 P≤0.020％；
Residual element: Cr≤0.10%, Ni≤0.10%, Cu≤0.10%, and Cr+Ni+Cu≤0.20%; All the other are Fe and unavoidable impurities.
Through analysis of experiments and detection, yield strength σ of the present invention
sBe 625～680MPa, tensile strength sigma
bBe 825～870MPa, unit elongation δ
5Be 19～24%, normal temperature ballistic work A
KvBe 21～32J.
Because its yield strength, tensile strength are better than former hot rolling mine resin roof bolt steel, so the present invention has when the shaft and drift supporting of colliery, can reduce support density, improves supporting effect, improves operating efficiency, saves characteristics such as material, fund such as anchor pole and resin.
Claims (2)
1, a kind of super high strength hot rolled steel bar for mine resin roof bolt is characterized in that yield strength σ of the present invention
s〉=600MPa, tensile strength sigma
b〉=800MPa, unit elongation δ
5〉=18%, normal temperature ballistic work A
KV〉=20J;
2, super high strength hot rolled steel bar for mine resin roof bolt according to claim 1 is characterized in that chemical ingredients of the present invention is by weight:
C：0.25～0.28％、 Mn：1.40～1.55％、 Si：0.40～0.60％、
V：0.14～0.16％、 S：≤0.020％、 P：≤0.020％；
Residual element: Cr≤0.10%, Ni≤0.10%, Cu≤0.10%, and Cr+Ni+Cu≤0.20%;
All the other are Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044183 CN1847435A (en) | 2006-05-13 | 2006-05-13 | Super high strength hot rolled steel bar for mine resin roof bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044183 CN1847435A (en) | 2006-05-13 | 2006-05-13 | Super high strength hot rolled steel bar for mine resin roof bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1847435A true CN1847435A (en) | 2006-10-18 |
Family
ID=37077174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610044183 Pending CN1847435A (en) | 2006-05-13 | 2006-05-13 | Super high strength hot rolled steel bar for mine resin roof bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1847435A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383048A (en) * | 2011-11-01 | 2012-03-21 | 莱芜钢铁集团有限公司 | Hot-rolled mining resin anchor rod reinforcing steel bar and production method thereof |
| CN102605255A (en) * | 2012-01-19 | 2012-07-25 | 武汉钢铁(集团)公司 | 400Mpa grade corrosion resistant reinforcing steel bar |
| CN104451443A (en) * | 2014-11-21 | 2015-03-25 | 芜湖新兴铸管有限责任公司 | Anchor rod steel for coal mines and production method thereof |
| CN104805355A (en) * | 2015-03-30 | 2015-07-29 | 武汉钢铁(集团)公司 | Anchor bar steel and production method thereof |
| CN105296853A (en) * | 2015-11-30 | 2016-02-03 | 山东石横特钢集团有限公司 | 930-MPa high-strength finished deformed steel bars and preparation technology thereof |
| CN106399852A (en) * | 2016-09-19 | 2017-02-15 | 石横特钢集团有限公司 | 840MPa-level hot-rolled anchor rod reinforcing steel bar and production process thereof |
| CN106636882A (en) * | 2016-09-19 | 2017-05-10 | 石横特钢集团有限公司 | High-toughness MG600 reinforced bar and production method thereof |
| CN107620002A (en) * | 2017-11-12 | 2018-01-23 | 湖南华菱湘潭钢铁有限公司 | The production method of high strength resin bolt reinforcing bar |
| CN108913990A (en) * | 2018-06-20 | 2018-11-30 | 河钢股份有限公司承德分公司 | A kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method |
| CN112159925A (en) * | 2020-09-15 | 2021-01-01 | 石横特钢集团有限公司 | Production process of high-strength and high-toughness anchor rod steel billet |
-
2006
- 2006-05-13 CN CN 200610044183 patent/CN1847435A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383048A (en) * | 2011-11-01 | 2012-03-21 | 莱芜钢铁集团有限公司 | Hot-rolled mining resin anchor rod reinforcing steel bar and production method thereof |
| CN102605255A (en) * | 2012-01-19 | 2012-07-25 | 武汉钢铁(集团)公司 | 400Mpa grade corrosion resistant reinforcing steel bar |
| CN104451443A (en) * | 2014-11-21 | 2015-03-25 | 芜湖新兴铸管有限责任公司 | Anchor rod steel for coal mines and production method thereof |
| CN104451443B (en) * | 2014-11-21 | 2017-04-26 | 芜湖新兴铸管有限责任公司 | Anchor rod steel for coal mines and production method thereof |
| CN104805355A (en) * | 2015-03-30 | 2015-07-29 | 武汉钢铁(集团)公司 | Anchor bar steel and production method thereof |
| CN105296853A (en) * | 2015-11-30 | 2016-02-03 | 山东石横特钢集团有限公司 | 930-MPa high-strength finished deformed steel bars and preparation technology thereof |
| CN106399852A (en) * | 2016-09-19 | 2017-02-15 | 石横特钢集团有限公司 | 840MPa-level hot-rolled anchor rod reinforcing steel bar and production process thereof |
| CN106636882A (en) * | 2016-09-19 | 2017-05-10 | 石横特钢集团有限公司 | High-toughness MG600 reinforced bar and production method thereof |
| CN107620002A (en) * | 2017-11-12 | 2018-01-23 | 湖南华菱湘潭钢铁有限公司 | The production method of high strength resin bolt reinforcing bar |
| CN108913990A (en) * | 2018-06-20 | 2018-11-30 | 河钢股份有限公司承德分公司 | A kind of 600MPa grade high-plasticity anchor pole reinforcing bar and production method |
| CN112159925A (en) * | 2020-09-15 | 2021-01-01 | 石横特钢集团有限公司 | Production process of high-strength and high-toughness anchor rod steel billet |
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