CN105907935A - Thermal processing process for metal workpiece - Google Patents
Thermal processing process for metal workpiece Download PDFInfo
- Publication number
- CN105907935A CN105907935A CN201610385705.9A CN201610385705A CN105907935A CN 105907935 A CN105907935 A CN 105907935A CN 201610385705 A CN201610385705 A CN 201610385705A CN 105907935 A CN105907935 A CN 105907935A
- Authority
- CN
- China
- Prior art keywords
- metal workpiece
- metal
- heating
- thermal processing
- workpiece
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
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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
- C21D1/06—Surface hardening
- C21D1/08—Surface hardening with flames
-
- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
-
- 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
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
Abstract
The invention discloses a thermal processing process for a metal workpiece. The thermal processing process for the metal workpiece comprises the following process steps of (1) cleaning the metal workpiece; (2) coating the metal workpiece with a coating; (3) drying the metal workpiece; (4) transient heating; (5) carrying out heating and thermal insulation; and (6) cooling. According to the thermal processing process, during transient heating, a laser flame jet heat exchanger is adopted to transiently heat the metal workpiece to the temperature near or exceeding the metal qualitative change temperature; and during heating and thermal insulation, a vacuum heating furnace is adopted, and a composite gas of ammonia gas, methane and nitrous oxide is also introduced into the vacuum heating furnace. The thermal processing process for the metal workpiece is simple in process and liable to operate and has the characteristics that by adopting transient heating, the metal thermal processing efficiency can be improved, while as the vacuum heating furnace can improve the performances of the metal workpiece, the deformation of metal workpiece is reduced, and the quality of the metal workpiece is ensured.
Description
Technical field
The present invention relates to metalwork heat treatment industry, particularly relate to a kind of heat treatment process of metal workpiece.
Background technology
Metal heat treatmet is to be placed on metal works in certain medium to heat, be incubated, cool down, and is controlled the process of its performance by the institutional framework changing metal material surface or inside.Metal heat treatmet is one of important process in machine-building, it is heat-treated and does not typically change the shape of workpiece and overall chemical composition, but the molecular structure of inside workpiece is changed by heating, or change the chemical composition of surface of the work, give or improve the serviceability of workpiece.And changing of metal works internal performance is closely bound up with the process conditions used when being heat-treated, a kind of suitable technique can give the serviceability required for metal works.Often there are all kinds of problems such as technique is loaded down with trivial details, and the time is long, and metal works deformation is bigger in current heat treatment process of metal workpiece.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of heat treatment process of metal workpiece, and this technology process is simple, it is easy to operation, and the used time is shorter, and metal heat treatmet efficiency is high, reduces the deformation of metal works, it is ensured that metal works quality simultaneously.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is:
A kind of metalwork Technology for Heating Processing is provided, comprises the following steps that:
(1) metal works cleans；
(2) metal works coating coating；
(3) metal works is dried；
(4) transient heating:
(5) heating and thermal insulation: use vacuum furnace heating；
(6) cooling.
In a preferred embodiment of the present invention, described step (4) use laser flame jet heater described metal works is carried out transient heating.
In a preferred embodiment of the present invention, in described step (4), heating temperature range is that metallic temperature is interval, and the time is 10-15 minute.
In a preferred embodiment of the present invention, in described step (5), in described vacuum furnace, initial depression is 15-20KPa, and in described vacuum furnace, it being passed through the composite gas of ammonia, methane and nitrous oxide, described composite gas consists of ammonia 30%, methane 50%, nitrous oxide 20%, then by the controling of the pressure of the oven of described vacuum furnace at 25-35KPa, temperature controls at 550～600 DEG C, and is incubated 4～5 hours.
The invention has the beneficial effects as follows: one heat treatment process of metal workpiece of the present invention, this technology process is simple, it is easy to operation, and the metal works heat treatment efficiency using this PROCESS FOR TREATMENT is high, non-oxidation, without carburizing, and metal works deformation is little, and quality is good.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with specific embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of heat treatment process of metal workpiece, comprises the following steps that:
(1) metal works cleans；
(2) metal works coating coating；
(3) metal works is dried；
(4) transient heating:
(5) heating and thermal insulation: use vacuum furnace heating；
(6) cooling.
In described step 4, use laser flame jet heater that described metal works is carried out transient heating.Even heating-up temperature is for close to exceeding metallic temperature in described step 4, the time is 10-15 minute.Instantaneously heated mode can make metal reach qualitative change temperature at short notice, makes metal surface form one layer of fine and close oxide layer.
In described step 5, in described vacuum furnace, initial depression is 15-20KPa, and in described vacuum furnace, it is passed through the composite gas of ammonia+methane+nitrous oxide, described composite gas consists of ammonia 30%, methane 50%, nitrous oxide 20%, then by the controling of the pressure of the oven of described vacuum furnace at 25-35KPa, temperature controls at 550～600 DEG C, and is incubated 4～5 hours.Use heating in vacuum and be filled with the mode of composite gas and make surface of workpiece layer phase structure adjust active carbon nitrogen element, form hardened layer, improve workpiece quality, realize non-oxidation, without decarburization, without carburizing, the phosphorus bits of surface of the work can be removed, and have the effects such as degreasing degasification, thus reach the effect that surface-brightening purifies.
Present invention process is simple, and step is few, it is easy to operation, and the feature of this technique is to use transient heating can improve metal heat treatmet efficiency, and vacuum furnace can improve metal works performance, forms hardened layer, reduces metal works deformation, it is ensured that metal works quality.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (4)
1. a heat treatment process of metal workpiece, it is characterised in that comprise the following steps that:
(1) metal works cleans；
(2) metal works coating coating；
(3) metal works is dried；
(4) transient heating；
(5) heating and thermal insulation: use vacuum furnace heating；
(6) cooling.
A kind of heat treatment process of metal workpiece the most according to claim 1, it is characterised in that use laser flame jet heater that described metal works is carried out transient heating in described step (4).
A kind of heat treatment process of metal workpiece the most according to claim 1, it is characterised in that in described step (4), heating temperature range is that metallic temperature is interval, and the time is 10-15 minute.
A kind of heat treatment process of metal workpiece the most according to claim 1, it is characterized in that, in described step 5, in described vacuum furnace, initial depression is 15-20KPa, and is passed through the composite gas of ammonia, methane and nitrous oxide in described vacuum furnace, described composite gas consists of ammonia 30%, methane 50%, nitrous oxide 20%, then by the controling of the pressure of the oven of described vacuum furnace at 25-35KPa, temperature controls at 550～600 DEG C, and is incubated 4～5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385705.9A CN105907935A (en) | 2016-06-03 | 2016-06-03 | Thermal processing process for metal workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385705.9A CN105907935A (en) | 2016-06-03 | 2016-06-03 | Thermal processing process for metal workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105907935A true CN105907935A (en) | 2016-08-31 |
Family
ID=56743000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610385705.9A Pending CN105907935A (en) | 2016-06-03 | 2016-06-03 | Thermal processing process for metal workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105907935A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155330A (en) * | 1981-03-23 | 1982-09-25 | Nippon Steel Corp | Equipment for producing steel material for wire blank excellent in inhibition of decarburization |
| CN101058887A (en) * | 2007-06-01 | 2007-10-24 | 南京汽车集团有限公司 | Heat treatment process for automobile gear shifting box synchronizer gear sheath |
| CN102747198A (en) * | 2012-07-31 | 2012-10-24 | 重庆创隆实业有限公司 | Surface hardening process for metal stamping die |
| CN203625439U (en) * | 2013-09-16 | 2014-06-04 | 宝山钢铁股份有限公司 | Sheet steel rapid heating annealing test furnace |
-
2016
- 2016-06-03 CN CN201610385705.9A patent/CN105907935A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155330A (en) * | 1981-03-23 | 1982-09-25 | Nippon Steel Corp | Equipment for producing steel material for wire blank excellent in inhibition of decarburization |
| CN101058887A (en) * | 2007-06-01 | 2007-10-24 | 南京汽车集团有限公司 | Heat treatment process for automobile gear shifting box synchronizer gear sheath |
| CN102747198A (en) * | 2012-07-31 | 2012-10-24 | 重庆创隆实业有限公司 | Surface hardening process for metal stamping die |
| CN203625439U (en) * | 2013-09-16 | 2014-06-04 | 宝山钢铁股份有限公司 | Sheet steel rapid heating annealing test furnace |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160831 |