CN116179936A - 一种新型板材及其生产工艺 - Google Patents
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910052796 boron Inorganic materials 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 238000003723 Smelting Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000005242 forging Methods 0.000 claims description 13
- 229910052804 chromium Inorganic materials 0.000 claims description 11
- 229910052748 manganese Inorganic materials 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 11
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 10
- 238000005098 hot rolling Methods 0.000 claims description 10
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 claims description 8
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000006104 solid solution Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 4
- 229910003252 NaBO2 Inorganic materials 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 239000004328 sodium tetraborate Substances 0.000 claims description 4
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 2
- QYHKLBKLFBZGAI-UHFFFAOYSA-N boron magnesium Chemical compound [B].[Mg] QYHKLBKLFBZGAI-UHFFFAOYSA-N 0.000 claims description 2
- 229910052810 boron oxide Inorganic materials 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-N hydrogen bromide Substances Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 2
- 229910000040 hydrogen fluoride Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 238000010791 quenching Methods 0.000 abstract description 6
- 230000000171 quenching effect Effects 0.000 abstract description 6
- 239000010935 stainless steel Substances 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 3
- 229910000521 B alloy Inorganic materials 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000005520 cutting process Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005496 tempering Methods 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
本发明涉及板材技术领域，且公开了一种新型板材及其生产工艺，其元素组成及各成分的重量百分比含量为：Si为≤0.70％，C为0.042‑0.12％，Mn为≤2.00％，P为≤0.038％，Cr为15.98‑17.98％，S为≤0.028％，Ni为10.50～14.0％，B为0.0003‑0.005％，Mo为2.0～3.0％，余量为Fe，在进行不锈钢板材冶炼时，将硼合金元素加入其内部，能够有效的提高了不锈钢板材的淬透性、高温强度以及强化晶界的作用，同时在规定条件下，决定钢材淬硬深度和硬度分布的特性，大大提高了钢材接受的淬火能力。
Description
技术领域
本发明涉及板材技术领域，具体为一种新型板材及其生产工艺。
背景技术
具有高韧性和塑度性，但强度较低，不可能通过相变使之强化专，仅能通过冷加工进行强化自因添加Mo元素，使其耐蚀性、和高温强度有较大的提高，耐高温可达到1200-1300度，可在苛酷的条件下使用。在重工业、轻工业、生活用品行业以及百建筑装饰等行业中获广泛的应用。
然而，板材在制作的过程中，为了提高材料的机械性能、消除残余应力和改善金属的切削加工性通常需要对板材进行热处理，热处理中包含有回火、正火、淬火等，由于现有钢材在淬火而淬火的过程中，由于淬透性不足的原因，导致钢材在淬火过程中，其淬硬深度以及硬度分布有着很大的差异，进一步影响了刚才的质量。
发明内容
为达到本发明的目的，本发明的一种新型板材及其生产工艺，元素组成及各成分的重量百分比含量为：Si为≤0.70％，C为 0.042-0.12％，Mn为≤2.00％，P为≤0.038％，Cr为15.98-17.98％，S 为≤0.028％，Ni为10.50～14.0％，B为0.0003-0.005％，Mo为2.0～3.0％，余量为Fe。
优选的，所述新型板材的元素组成及各成分的重量百分比含量为： Si为0.65％，C为0.038％，Mn为2.00％，P为0.04％，Cr为16.50％，S为0.025％，Ni为11.50％，B为0.0023％，Mo为2.0％，余量为Fe。
再优选的，所述新型板材的元素组成及各成分的重量百分比含量为：Si为0.68％，C为0.039％，Mn为2.00％，P为0.043％，Cr为16.70％， S为0.028％，Ni为12.50％，B为0.0035％，Mo为2.0％，余量为Fe。
一种新型板材及其生产工艺，其特征在于，包括以下步骤：
(1)冶炼：按照前述的成分配比进行配料，并将配备好的配料投放至炉内进行冶炼，同时加入还原剂对铁氧化物进行还原成金属铁，冶炼的温度为1600-2300℃；
(2)转炉：将氧气鼓入炉内，促使炉内的元素杂质进行氧化，氧化炉内元素会产生大量的热，不需要外加热源，冶炼的过程中去除有害气体和非金属夹杂物；
(3)锻造：锻造时，将始锻温度加热至1140～1300℃之间，终锻温度800-900℃，保温时间为35-80min；
(4)热轧：将锻造后的锻坯热轧成板材，热轧初始温度为 1100～1250℃，终止温度在800-900℃，最后在空气中冷却；
(5)固溶：对热轧后的板材进行热处理，热处理温度1060-1200℃，固溶时间为55-80min，在此温度和时间段，可促使钢板的力学性能良好；
(6)检验：包括尺寸、拉伸性能、持久性能、硬度、表面质量、晶粒度、铁素体含量等
优选的，所述B的制备方法为：
(1)首先用浓碱液分解硼镁矿得偏硼酸钠，将NaBO2在强碱溶液中结晶出来，使之溶于水成为较浓的溶液，通入CO2调节碱度，浓缩结晶即得到四硼酸钠
(2)将四硼酸钠溶于水，用硫酸调节酸度，可析出溶解度小的硼酸晶体。加热使硼酸脱水生成三氧化二硼，经干燥处理后，用镁或铝还原B2O3得到粗硼
(3)将粗硼分别用盐酸、氢氧化钠和氟化氢处理，可得纯度为 95～98％的棕色无定形硼
(4)最纯的单质硼用氢还原法制得：使氢气和三溴化硼的混合气体经过钽丝，电热到1500K，三溴化硼在高温下被氢还原，生成的硼在钽丝上成片状或针状结构
(5)由镁粉或铝粉加热还原氧化硼而得。
本发明相对以往的好处为：
在进行不锈钢板材冶炼时，将硼合金元素加入其内部，能够有效的提高了不锈钢板材的淬透性、高温强度以及强化晶界的作用，同时在规定条件下，决定钢材淬硬深度和硬度分布的特性，大大提高了钢材接受的淬火能力。
具体实施方式
结合具体实施例对本发明的特征和优点详述如下：
实施例1：
Si为0.75％，C为0.038％，Mn为1.95％，P为0.04％，Cr为16.50％，S为0.025％，Ni为12.30％，B为0.0028％，Mo为1.98％，余量为Fe。
实施例2：
Si为0.65％，C为0.035％，Mn为2.00％，P为0.045％，Cr为16.70％， S为0.028％，Ni为12.50％，B为0.0033％，Mo为1.96％，余量为Fe。
实施例3：
Si为0.70％，C为0.037％，Mn为1.98％，P为0.043％，Cr为16.60％， S为0.027％，Ni为12.85％，B为0.0023％，Mo为1.99％，余量为Fe。
实施例4：
Si为0.65％，C为0.035％，Mn为1.97％，P为0.04％，Cr为16.80％， S为0.030％，Ni为13.50％，B为0.0029％，Mo为1.97％，余量为Fe。
实施例5：
Si为0.75％，C为0.036％，Mn为2.00％，P为0.045％，Cr为17.50％， S为0.028％，Ni为13.40％，B为0.003％，Mo为1.98％，余量为Fe。
将上述的实施例的按设计成分配料；将配料好的原料放入感应熔炼炉内，冲入氩气，在2300摄氏度下进行熔炼；然后将熔炼好的钢水注入转炉内部，并向转炉内部鼓入氧气，去除有害气体以及非金属杂质；锻造初始温度为1140-1300摄氏度，终锻温度为800-900摄氏度，保温时间为35-80min之间；将锻造后锻坯热轧成板材，热轧的初始温度为1100-1250摄氏度，终轧温度为800-900摄氏度，最后在空气中冷却；将热轧后的板材放入热处理炉内，热处理温度为 1060-1200摄氏度，固溶时间为55-80min，然后随炉冷却；最后对板材性能进行检验。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。
Claims (5)
1.一种新型板材及其生产工艺，其特征在于，所述新型板材的元素组成及各成分的重量百分比含量为：Si为≤0.70％，C为0.042-0.12％，Mn为≤2.00％，P为≤0.038％，Cr为15.98-17.98％，S为≤0.028％，Ni为10.50～14.0％，B为0.0003-0.005％，Mo为2.0～3.0％，余量为Fe。
2.根据权利要求1所述的一种新型板材及其生产工艺，其特征在于：所述新型板材的元素组成及各成分的重量百分比含量为：Si为0.65％，C为0.038％，Mn为2.00％，P为0.04％，Cr为16.50％，S为0.025％，Ni为11.50％，B为0.0023％，Mo为2.0％，余量为Fe。
3.根据权利要求1所述的一种新型板材及其生产工艺，其特征在于：所述新型板材的元素组成及各成分的重量百分比含量为：Si为0.68％，C为0.039％，Mn为2.00％，P为0.043％，Cr为16.70％，S为0.028％，Ni为12.50％，B为0.0035％，Mo为2.0％，余量为Fe。
4.一种新型板材及其生产工艺，其特征在于，包括以下步骤：
(1)冶炼：按照前述的成分配比进行配料，并将配备好的配料投放至炉内进行冶炼，同时加入还原剂对铁氧化物进行还原成金属铁，冶炼的温度为1600-2300℃；
(2)转炉：将氧气鼓入炉内，促使炉内的元素杂质进行氧化，氧化炉内元素会产生大量的热，不需要外加热源，冶炼的过程中去除有害气体和非金属夹杂物；
(3)锻造：锻造时，将始锻温度加热至1140～1300℃之间，终锻温度800-900℃，保温时间为35-80min；
(4)热轧：将锻造后的锻坯热轧成板材，热轧初始温度为1100～1250℃，终止温度在800-900℃，最后在空气中冷却；
(5)固溶：对热轧后的板材进行热处理，热处理温度1060-1200℃，固溶时间为55-80min，在此温度和时间段，可促使钢板的力学性能良好；
(6)检验：包括尺寸、拉伸性能、持久性能、硬度、表面质量、晶粒度、铁素体含量等。
5.根据权利要求1所述的一种新型板材及其生产工艺，其特征在于，所述B的制备方法为：
(1)、首先用浓碱液分解硼镁矿得偏硼酸钠，将NaBO2在强碱溶液中结晶出来，使之溶于水成为较浓的溶液，通入CO2调节碱度，浓缩结晶即得到四硼酸钠；
(2)、将四硼酸钠溶于水，用硫酸调节酸度，可析出溶解度小的硼酸晶体。加热使硼酸脱水生成三氧化二硼，经干燥处理后，用镁或铝还原B2O3得到粗硼；
(3)、将粗硼分别用盐酸、氢氧化钠和氟化氢处理，可得纯度为95～98％的棕色无定形硼；
(4)、最纯的单质硼用氢还原法制得：使氢气和三溴化硼的混合气体经过钽丝，电热到1500K，三溴化硼在高温下被氢还原，生成的硼在钽丝上成片状或针状结构；
(5)、由镁粉或铝粉加热还原氧化硼而得。
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