CN111621717A - Method for controlling surface hardness fluctuation of titanium-containing pickled plate - Google Patents
Method for controlling surface hardness fluctuation of titanium-containing pickled plate Download PDFInfo
- Publication number
- CN111621717A CN111621717A CN202010692880.9A CN202010692880A CN111621717A CN 111621717 A CN111621717 A CN 111621717A CN 202010692880 A CN202010692880 A CN 202010692880A CN 111621717 A CN111621717 A CN 111621717A
- Authority
- CN
- China
- Prior art keywords
- titanium
- fluctuation
- surface hardness
- pickled plate
- controlling
- 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.)
- Pending
Links
Classifications
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
Abstract
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for controlling surface hardness fluctuation of a titanium-containing pickled plate. The invention aims to solve the technical problem of providing a method for controlling the surface hardness fluctuation of a titanium-containing pickled plate. The method comprises the following steps: controlling the fluctuation of the Ti content in the titanium-containing acid-washing plate within 0.01 percent. According to the invention, the fluctuation of the Ti content is optimized within 0.01%, the HRB fluctuation of the product caused by Ti can be controlled within +/-2.3, and the requirement of HRB +/-6 of the surface hardness of the product is finally realized.
Description
Technical Field
The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for controlling surface hardness fluctuation of a titanium-containing pickled plate.
Background
The hot-rolled pickled plate is an intermediate product between a cold-rolled plate and a hot-rolled plate, and has the following advantages: (1) because the high-quality hot-rolled sheet is used as a raw material, and the surface oxide layer is removed by the pickling line, the surface quality of the hot-rolled sheet is close to that of a cold-rolled sheet, and the mechanical property of the hot-rolled sheet is kept; (2) the surface quality is high, so that the welding, oiling and painting are convenient, the dimensional precision of the product is high, and unevenness can be reduced in the leveling process; (3) compared with cold-rolled plates, the hot-rolled pickled plates can effectively reduce the raw material purchasing cost of customers.
The household appliance industry is a large application field of hot-rolled pickled plates, however, general household appliance users do not have mechanical property detection equipment, in the using process of a steel plate, the hardness is more direct to the sensory specific strength of people, and the hardness measurement is more convenient than the strength, so that the household appliance users often use the hardness as the basis for checking and accepting the mechanical property of steel, for example, a compressor manufacturing enterprise requires that the surface hardness of the pickled plate for a compressor is HRB +/-6.
In the process of manufacturing the coiled pipe of the compressor, the hardness of the hot-rolled pickled plate directly influences the opening degree of the coiled pipe, so that the welding quality is influenced, the hardness fluctuation of the hot-rolled pickled plate is accurately controlled, and the good welding quality can be ensured. At present, no relevant report of a method for controlling the surface hardness fluctuation of the titanium-containing pickled plate is found.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for controlling the surface hardness fluctuation of a titanium-containing pickled plate.
The technical scheme for solving the technical problems is to provide the method for controlling the surface hardness fluctuation of the titanium-containing pickled plate, and the method is to control the fluctuation of the Ti content in the titanium-containing pickled plate within 0.01 percent.
Further, the lower limit of the Ti content in the titanium-containing pickled plate is 0.015%.
Further, the titanium-containing pickled plate comprises the following components in percentage by mass: c: 0.04-0.06%, Mn: 0.15-0.25%, P is less than or equal to 0.015%, S is less than or equal to 0.010%, Ti: 0.015 to 0.025%.
The invention has the beneficial effects that:
according to the invention, the influence relation of each alloy element on the surface hardness of the titanium-containing pickled plate, namely HRB 45.06+38.31C +7.93Mn +453.98Ti +293.7P, is obtained through production practice and experimental research, and by optimizing the Ti content fluctuation within 0.01%, the HRB fluctuation of a product caused by Ti can be controlled within +/-2.3, and the requirement of HRB +/-6 of the surface hardness of the product is finally realized.
Detailed Description
Specifically, the invention provides a method for controlling the surface hardness fluctuation of a titanium-containing pickled plate, which is to control the fluctuation of the Ti content in the titanium-containing pickled plate within 0.01 percent.
Further, the lower limit of the Ti content in the titanium-containing pickled plate is 0.015%.
Further, the titanium-containing pickled plate comprises the following components in percentage by mass: c: 0.04-0.06%, Mn: 0.15-0.25%, P is less than or equal to 0.015%, S is less than or equal to 0.010%, Ti: 0.015 to 0.025%.
The inventors analyzed the influence of Ti element on the hardness of titanium-containing pickled plate. According to the national standard GB/T1172-1999, there is a certain relationship between hardness and strength, see Table 1.
TABLE 1 hardness to Strength correlation
The Ti has strong affinity with C, N, and TiN, TiC and Ti exist in Ti microalloyed steel4C2S2And the formation of a large amount of precipitates, which exist in various stages from continuous casting to coiling, including continuous casting and cooling stages of TiN and Ti4C2S2The liquid and solid phases of (1) are separated out; in the continuous rolling stage, TiC is precipitated in austenite through deformation induction; and the interphase precipitation of TiC at the layer cooling stage and the supersaturated precipitation of TiC in ferrite at the coiling stage. Wherein, the high-temperature solid precipitation TiN with the size of less than 100nm can effectively inhibit the growth of austenite grains in the heating and hot rolling processes. The austenite region deformation can induce and precipitate spherical TiC particles with the diameter of about 10 nm-30 nm, and the TiC particles are distributed in a matrix more uniformly and can play a role in refining grains. The TiC particles precipitated in the ferrite at the coiling stage are smaller and larger in size, and these particles exert a remarkable reinforcing effect. Therefore, through theoretical analysis, the strengthening effect of Ti precipitates in the titanium-containing pickled plate on the product is obvious, so that the hardness of the product is greatly influenced.
The inventor collects the chemical components of the steel product for the Panzhihua steel Ti microalloying high-quality compressor and the corresponding hardness value under each chemical component, and carries out regression analysis to research the correlation between the chemical components and the hardness, wherein the sample number is 937 volume, the hardness HRB is 52-68, and the fluctuation is +/-8. The distribution of the main chemical components is shown in table 2, the chemical components of the high-quality compressor steel are mainly C, Mn, Ti, P, etc., and Si as a residual element hardly plays a reinforcing role and can be disregarded.
TABLE 2 chemical composition distribution (number of samples: 937 vol)/%
| C | Mn | P | Ti |
| 0.04～0.06 | 0.18～0.24 | 0.007～0.015 | 0.013～0.028 |
And (3) calculating by adopting Minitab software to obtain a regression result of the hardness and the components:
HRB＝45.06+38.31C+7.93Mn+453.98Ti+293.7P
the actual value and the fitting value of the hardness are shown in table 3, and the accuracy of the actual value and the fitting value is high and the regression effect is good as can be seen from table 3.
TABLE 3 actual values of strength, hardness and fitting values
From the influence coefficients of the respective elements in the above formula, it is found that the influence on the hardness is most significant for the Ti element, but is inferior to the P element, and the influence of the C element and the Mn element is relatively small. Since too high a P content significantly reduces the plasticity and low-temperature toughness of the steel, the P content in the pickled sheet is generally controlled to a low value, so that the influence of the P content on the hardness fluctuation of the product is reduced. Therefore, the fluctuation of the Ti content in the titanium-containing pickled plate can obviously influence the fluctuation range of the HRB (Rockwell hardness) of the product surface, and through the research, the inventor optimizes the Ti content fluctuation within 0.01 percent, can control the HRB fluctuation of the product caused by Ti element within +/-2.3, and finally is beneficial to realizing the requirement of the HRB +/-6 of the product surface.
Examples and comparative examples
The Ti content in the alloy components of the acid-washed plate for the Panzhihua steel Ti microalloying compressor is optimized, and the required components are obtained by a conventional smelting method. The examples and comparative examples were produced under the same rolling process, and the distribution of the product components and the fluctuation of hardness are shown in Table 4.
TABLE 4 chemical composition distribution and hardness fluctuation of examples and comparative examples
As can be seen from Table 4, the embodiment reduces the fluctuation range of the Ti content, controls the Ti content to be 0.016-0.025%, reduces the hardness fluctuation and realizes the HRB +/-6 of the surface hardness of the product.
Claims (3)
1. The method for controlling the surface hardness fluctuation of the titanium-containing pickled plate is characterized by comprising the following steps: controlling the fluctuation of the Ti content in the titanium-containing acid-washing plate within 0.01 percent.
2. The method of controlling surface hardness fluctuations in titanium-containing pickled plate as claimed in claim 1, wherein: the lower limit value of the Ti content in the titanium-containing pickled plate is 0.015%.
3. The method for controlling the fluctuation in the surface hardness of titanium-containing pickled plates according to claim 1 or 2, characterized in that: the titanium-containing pickled plate comprises the following components in percentage by mass: c: 0.04-0.06%, Mn: 0.15-0.25%, P is less than or equal to 0.015%, S is less than or equal to 0.010%, Ti: 0.015 to 0.025%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692880.9A CN111621717A (en) | 2020-07-17 | 2020-07-17 | Method for controlling surface hardness fluctuation of titanium-containing pickled plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692880.9A CN111621717A (en) | 2020-07-17 | 2020-07-17 | Method for controlling surface hardness fluctuation of titanium-containing pickled plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111621717A true CN111621717A (en) | 2020-09-04 |
Family
ID=72257768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010692880.9A Pending CN111621717A (en) | 2020-07-17 | 2020-07-17 | Method for controlling surface hardness fluctuation of titanium-containing pickled plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111621717A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04210451A (en) * | 1990-12-13 | 1992-07-31 | Sumitomo Metal Ind Ltd | High strength and high corrosion resistant stainless steel excellent in cold workability |
| CN101698900A (en) * | 2009-09-02 | 2010-04-28 | 北京科技大学 | Production technology method of low content alloy ultrahigh hardness wear-resistant steel plate |
| CN102732795A (en) * | 2012-05-31 | 2012-10-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-rolled pickled plate with excellent formability for automobile structure and production method thereof |
| CN105002439A (en) * | 2015-07-30 | 2015-10-28 | 武汉钢铁(集团)公司 | Wear-resistant steel with 400-level Brinell hardness and manufacturing method thereof |
| CN111663075A (en) * | 2020-04-09 | 2020-09-15 | 北京首钢股份有限公司 | Pickled steel for stamping and preparation method and application thereof |
-
2020
- 2020-07-17 CN CN202010692880.9A patent/CN111621717A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04210451A (en) * | 1990-12-13 | 1992-07-31 | Sumitomo Metal Ind Ltd | High strength and high corrosion resistant stainless steel excellent in cold workability |
| CN101698900A (en) * | 2009-09-02 | 2010-04-28 | 北京科技大学 | Production technology method of low content alloy ultrahigh hardness wear-resistant steel plate |
| CN102732795A (en) * | 2012-05-31 | 2012-10-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Hot-rolled pickled plate with excellent formability for automobile structure and production method thereof |
| CN105002439A (en) * | 2015-07-30 | 2015-10-28 | 武汉钢铁(集团)公司 | Wear-resistant steel with 400-level Brinell hardness and manufacturing method thereof |
| CN111663075A (en) * | 2020-04-09 | 2020-09-15 | 北京首钢股份有限公司 | Pickled steel for stamping and preparation method and application thereof |
Non-Patent Citations (7)
| Title |
|---|
| 任利珍: ""原料化学成分对碳氮共渗心部硬度的影响"", 《金属加工（热加工）》 * |
| 刘惠恩: "《机械工程导论》", 30 September 2016, 北京理工大学出版社 * |
| 张晏清: "《建筑结构材料》", 29 February 2016, 同济大学出版社 * |
| 曹鹏军: "《金属材料学》", 30 November 2018, 冶金工业出版社 * |
| 殷瑞钰: "《钢的质量现代进展 下篇 特殊钢》", 30 June 1995, 冶金工业出版社 * |
| 王顺兴: "《金属热处理原理与工艺（第2版）》", 31 January 2019, 哈尔滨工业学出版社 * |
| 邵潭华: "《材料工程基础》", 31 March 2000, 西安交通大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110129668B (en) | 1000 MPa-grade alloying hot-dip galvanizing complex-phase steel and preparation method thereof | |
| CN108796375A (en) | A kind of tensile strength 1000MPa grades of hot-dip galvanized high-strength steels and its minimizing production method | |
| CN109881106B (en) | 780 MPa-grade hot-galvanized dual-phase steel with different yield strength grades and production method thereof | |
| CN109423577B (en) | High-strength multi-phase steel tinning raw plate and manufacturing method thereof | |
| CN110306102B (en) | Hot-rolled and pickled complex-phase steel with excellent surface quality and preparation method thereof | |
| CN109852900B (en) | 600 MPa-grade hot-galvanized dual-phase steel with different yield ratios and production method thereof | |
| WO2010119971A1 (en) | Cold-rolled steel sheet having excellent slow-aging property and high curability in baking, and method for producing same | |
| WO2021238916A1 (en) | Ultrahigh-strength dual-phase steel and manufacturing method therefor | |
| CN112157135B (en) | Production method of economical cold-rolled steel plate for water heater water tank outer plate | |
| CN104862592A (en) | Super deep-draw fingerprint resistant electro-galvanized plate and manufacturing method thereof | |
| CN105734403B (en) | A kind of steel saw blade hot-rolled coil and its production method | |
| CN111961789B (en) | Structural-grade color-coated base material hot-dip galvanized steel plate for thin-specification steel products and manufacturing method thereof | |
| CN111485170A (en) | Production method of low-hardness chilled carbon steel strip | |
| CN111100977A (en) | Production method of hot-rolled high-carbon steel | |
| CN110846569B (en) | Low-carbon cold-rolled steel and preparation method and application thereof | |
| CN111621717A (en) | Method for controlling surface hardness fluctuation of titanium-containing pickled plate | |
| CN110551947A (en) | Weather-resistant steel and preparation method thereof | |
| CN113088794B (en) | IF steel hot-dip galvanized steel sheet with low delta r value and preparation method thereof | |
| CN113122690B (en) | Low-delta r-value micro-carbon steel cold-rolled steel plate and preparation method thereof | |
| CN108504947A (en) | A kind of secondary cold-rolling tin plate and its production method | |
| CN111575589B (en) | Super-strength steel for sanitation vehicle and production method thereof | |
| CN108118258A (en) | A kind of production method of strip used for galvanized tube | |
| CN113122691A (en) | Low-delta r-value micro-carbon steel hot-dip galvanized steel plate and preparation method thereof | |
| CN111676420A (en) | Television backboard for household appliances and manufacturing method thereof | |
| CN112813342A (en) | Hot-dip galvanized steel strip for light steel with strength of 600MPa and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200904 |