CN111235375A - Saw blade heat treatment process - Google Patents
Saw blade heat treatment process Download PDFInfo
- Publication number
- CN111235375A CN111235375A CN201911031034.6A CN201911031034A CN111235375A CN 111235375 A CN111235375 A CN 111235375A CN 201911031034 A CN201911031034 A CN 201911031034A CN 111235375 A CN111235375 A CN 111235375A
- Authority
- CN
- China
- Prior art keywords
- saw blade
- bainite
- transformation
- austenite
- heat treatment
- 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
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Classifications
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/24—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for saw blades
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a heat treatment process of a saw blade, which comprises the following steps: s1: finishing the primary processing of the saw blade; s2: heating the saw blade after the primary processing; and heating to austenite; s3: in the supercooling process, pressurizing and fixing the saw blade in the transformation period from austenite to bainite, and correcting the deformation of the quenching deformation saw blade by utilizing the transformation of the bainite; s4: continuously pressurizing and fixing, and naturally cooling the saw blade; wherein, the transformation process from austenite to bainite takes place in the saw blade, and the time is about 1 hour; s5: after the temperature of the saw blade is reduced to room temperature, the saw blade is placed in a tempering furnace for tempering treatment, and the flatness of the saw blade is greatly improved by controlling the flatness when bainite is changed in the saw blade, so that the flatness requirement of a high-grade saw blade is met, and the probability of deformation in the quenching process is reduced.
Description
Technical Field
The invention relates to the technical field of garbage deodorization, in particular to a saw blade heat treatment process.
Background
Saw blades are a general term for thin circular cutters used to cut solid materials. The saw blade is also divided into different quality grades according to different use occasions, such as a common grade, a decoration grade, a professional grade, an industrial grade and the like. And for the saw blade with higher grade, the hardness, the flatness, the cracking and deformation prevention and other characteristics of the saw blade have higher requirements. In the existing production process, in order to improve various properties of the saw blade, the initial saw blade is often subjected to heat treatment processing. The existing saw blade heat treatment process generally comprises the following steps: quenching and medium temperature tempering, wherein the quenching is mainly used for improving the hardness of the saw blade, and the tempering is mainly used for removing the internal structure stress of the saw blade so as to reduce the possibility of cracking and deformation in the later use process of the saw blade.
However, in the quenching stage, whether air heating or salt bath, the blade is a thin sheet, and the convection of heat causes more or less heating deformation of the blade. In the quenching tank, the transformation of the saw blade from austenite to martensite is accompanied by the change of specific volume, and the structural stress is caused to form phase transformation deformation. Namely, the saw blade is easy to generate larger deformation amount in the quenching process. The deformation of the saw blade can be reduced to a certain extent in the tempering stage in a pressurizing mode, but the quenched saw blade is formed for the first time, namely the deformation of the saw blade reduced by tempering often cannot meet the flatness requirement of a high-grade saw blade.
A heat treatment process for a saw blade disclosed in Chinese patent application No. is as follows: 201810361171.5, which discloses the blade is pressurized during the quenching process, but it only discloses the pressurized fixation when the blade is lowered to a MS point, which is not corresponding to the internal structure point of the blade, and does not prevent the blade from deforming well.
Disclosure of Invention
The invention aims to provide a heat treatment process for a saw blade, which aims to solve the problems of the existing heat treatment process for the saw blade in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a heat treatment process for a saw blade comprises the following steps:
s1: finishing the primary processing of the saw blade;
s2: heating the saw blade after the primary processing; and heating to austenite; (ii) a
S3: in the supercooling process, pressurizing and fixing the saw blade in the transformation period from austenite to bainite, and correcting the deformation of the quenching deformation saw blade by utilizing the transformation of the bainite;
s4: continuously pressurizing and fixing, and naturally cooling the saw blade;
wherein, the transformation process from austenite to bainite takes place in the saw blade, and the time is about 1 hour;
s5: and after the temperature of the saw blade is reduced to room temperature, putting the saw blade in a tempering furnace for tempering treatment.
Preferably, the heating temperature of step S2 is 800-900 ℃.
Preferably, when the temperature of the saw blade is reduced to 400-500 ℃ in the step S3, bainite transformation is performed inside the saw blade; at this time, the saw blade is pressed and fixed.
Compared with the prior art, the invention has the beneficial effects that: the flatness of the saw blade is greatly improved by controlling the flatness when bainite is changed in the saw blade, so that the flatness requirement of a high-grade saw blade is met, and the probability of deformation in the quenching process is reduced.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Examples
The invention provides a technical scheme that: a heat treatment process for a saw blade comprises the following steps:
s1: finishing the primary processing of the saw blade;
s2: heating the saw blade after the primary processing; and heating to austenite; (ii) a
S3: in the supercooling process, pressurizing and fixing the saw blade in the transformation period from austenite to bainite, and correcting the deformation of the quenching deformation saw blade by utilizing the transformation of the bainite;
s4: continuously pressurizing and fixing, and naturally cooling the saw blade;
wherein, the transformation process from austenite to bainite takes place in the saw blade, and the time is about 1 hour;
s5: and after the temperature of the saw blade is reduced to room temperature, putting the saw blade in a tempering furnace for tempering treatment.
Wherein, the heating temperature of the step S2 is 800-900 ℃.
When the temperature of the saw blade is reduced to 400-500 ℃ in the step S3, bainite transformation is carried out inside the saw blade; at this time, the saw blade is pressed and fixed.
The flatness of the saw blade is greatly improved by controlling the flatness when bainite is changed in the saw blade, so that the flatness requirement of a high-grade saw blade is met, and the probability of deformation in the quenching process is reduced.
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. A heat treatment process for a saw blade is characterized in that: the method comprises the following steps:
s1: finishing the primary processing of the saw blade;
s2: heating the saw blade after the primary processing; and heating to austenite;
s3: in the supercooling process, pressurizing and fixing the saw blade in the transformation period from austenite to bainite, and correcting the deformation of the quenching deformation saw blade by utilizing the transformation of the bainite;
s4: continuously pressurizing and fixing, and naturally cooling the saw blade;
wherein, the transformation process from austenite to bainite takes place in the saw blade, and the time is about 1 hour;
s5: and after the temperature of the saw blade is reduced to room temperature, putting the saw blade in a tempering furnace for tempering treatment.
2. The heat treatment process for saw blades as claimed in claim 1, wherein: the heating temperature of step S2 is 800-900 ℃.
3. The heat treatment process for saw blades as claimed in claim 1, wherein: when the temperature of the saw blade is reduced to 400-500 ℃ in the step S3, bainite transformation is carried out inside the saw blade; at this time, the saw blade is pressed and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031034.6A CN111235375A (en) | 2019-10-28 | 2019-10-28 | Saw blade heat treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911031034.6A CN111235375A (en) | 2019-10-28 | 2019-10-28 | Saw blade heat treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111235375A true CN111235375A (en) | 2020-06-05 |
Family
ID=70867853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911031034.6A Pending CN111235375A (en) | 2019-10-28 | 2019-10-28 | Saw blade heat treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111235375A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0530175A2 (en) * | 1991-08-19 | 1993-03-03 | Martin Miller Aktiengesellschaft | Steel for wood saw blades |
| CN103320599A (en) * | 2013-06-24 | 2013-09-25 | 博深工具股份有限公司 | Saw blade matrix pressure quenching device and quenching process thereof |
| CN103547694A (en) * | 2011-04-28 | 2014-01-29 | 株式会社神户制钢所 | Hot press molded article, fabrication method therefor, and thin steel plate for hot press molding |
| CN104204251A (en) * | 2012-03-15 | 2014-12-10 | 株式会社神户制钢所 | Hot-press molded article and method for producing same |
| CN104694711A (en) * | 2015-03-16 | 2015-06-10 | 上海交通大学 | Control method of heat treatment distortion based on phase transformation plasticity |
| CN108251609A (en) * | 2018-04-20 | 2018-07-06 | 杭州双江工具制造有限公司 | A kind of saw blade heat treatment process |
-
2019
- 2019-10-28 CN CN201911031034.6A patent/CN111235375A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0530175A2 (en) * | 1991-08-19 | 1993-03-03 | Martin Miller Aktiengesellschaft | Steel for wood saw blades |
| CN103547694A (en) * | 2011-04-28 | 2014-01-29 | 株式会社神户制钢所 | Hot press molded article, fabrication method therefor, and thin steel plate for hot press molding |
| CN104204251A (en) * | 2012-03-15 | 2014-12-10 | 株式会社神户制钢所 | Hot-press molded article and method for producing same |
| CN103320599A (en) * | 2013-06-24 | 2013-09-25 | 博深工具股份有限公司 | Saw blade matrix pressure quenching device and quenching process thereof |
| CN104694711A (en) * | 2015-03-16 | 2015-06-10 | 上海交通大学 | Control method of heat treatment distortion based on phase transformation plasticity |
| CN108251609A (en) * | 2018-04-20 | 2018-07-06 | 杭州双江工具制造有限公司 | A kind of saw blade heat treatment process |
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| 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: 20200605 |