CN108359844A - With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity - Google Patents
With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity Download PDFInfo
- Publication number
- CN108359844A CN108359844A CN201810278654.9A CN201810278654A CN108359844A CN 108359844 A CN108359844 A CN 108359844A CN 201810278654 A CN201810278654 A CN 201810278654A CN 108359844 A CN108359844 A CN 108359844A
- Authority
- CN
- China
- Prior art keywords
- lead
- lead bath
- alloy
- volatilization
- bath
- 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.)
- Withdrawn
Links
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
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
-
- 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
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/64—Patenting furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C11/00—Alloys based on lead
- C22C11/06—Alloys based on lead with tin as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses with high heat capacity resistance to volatilization steel cord lead bath Pb Ca Sn metals and its processing technology.According to weight percent, the ingredient of the alloy is：Ca:1.0‑1.8wt.%,Sn:5.0‑8.0wt.%,Mg:2.0‑4.0wt.%,Ge：1.5 3.0wt.%, Nb:1.0‑2.0wt.%,Sc:0.5 1.0wt.%, surplus are lead.The development of the lead-calcium alloy will solve the problems, such as lead bath heat treatment process application in, for lead bath heat treatment popularization play the role of it is vital, also will be with great economic implications to industrial production.
Description
Technical field
The present invention relates to technical field of alloy, specifically, being related to a kind of lead-calcium alloy.
Background technology
The yield and structure kind of China's steel cord increase year by year, and steel cord manufacturing enterprise also has been devoted to production technology
Optimization, improved by equipment and technique adjustment, constantly reduce the wire broken rate of production each process, improve production efficiency and it is comprehensive at
Material rate.The change for quenching mode in production practice brings larger promotion to the stabilization and efficiency of steel cord production.Quenching
It is the critical process in medium high carbon Production for Steel Wire, especially final heat treatment quenching technical, steel wire obtain sorbite by quenching
Tissue, such tissue have higher limit of stretch, can get good comprehensive performance after steel wire drawing, give finished product steel cord
Required mechanical index is provided, while reducing steel cord fracture of wire phenomenon in process of production.The quenching mode of wire of steel wire tire cord
Mainly there are patenting, casting bed quenching, water-bath quenching.
Patenting is to cool down the process for completing structural transformation into carrying out quenching in molten lead by after steel part austenitizing,
Finally it is organized as fine pearlite.This is during manufacturing in the steel wire technique of carbon steel and high-carbon steel, in order to obtain appropriate tissue so as to
It is easy drawing and obtains a kind of conventional process of high quality.Lead bath heat treatment is a kind of traditional wire heat treatment process, is had
Thermal capacity is big, thermal conductivity is high, investment is small, at low cost, technique is easily controllable, isothermal transformation degree is high, after processing steel wire properties it is good,
The advantages that stable quality.
The shortcomings that lead bath is also apparent.（1）Though patenting is used widely in many enterprises, there is
Many defects, are mainly shown as Lead pollution environment, are detrimental to health；Thread very inconvenient, labor intensity is big；Lead liquid is easily tied
Slag safeguards complexity, careless slightly to influence following process because hanging lead.（2）Patenting agent is the metal quenching used early stage
Medium.Bath temperature is lower, and cooling rate is bigger.It is larger to human toxicity since lead bath can volatilize toxic gas, therefore just gradually by alkaline bath
Or salt made from earth containing a comparatively high percentage of sodium chloride is replaced.This kind of metal bath quenching medium also has leypewter bath etc., is primarily adapted for use in the Light deformation of complex-shaped workpieces
Quenching cooling.
Still there are many enterprises continuing to use this traditional heat treatment process both at home and abroad, especially in Production for Steel Wire, by lead
Bathe the steel wire of processing, there is good Soxhlet body tissue, ensure that can get after the good drawing property of steel wire and drawing it is high-strength
The comprehensive mechanical property of degree, high tenacity.Therefore lead-pot furnace can't completely be replaced by other heat treatment modes, it will be in the longer term
Interior presence.
The measure for carrying out lead contamination prevention for patenting at present, mainly based on lead pan coverture method.Namely select
Certain can play lead pan the material of certain sealing process, be covered on lead liquid, to prevent and control lead steam excess ease
Go out, the method to reach the exceeded improvement of lead contamination.Common coverture has：（1）Charcoal powder（2）SRQF covertures.By a variety of
A kind of covering material that silicate is combined, its main feature is that tasteless, high temperature resistant, heat-proof quality is good, has to lead steam relatively strong
Absorption rejection.（3）GBA liquid lead covertures.It consists of two parts:A part is the solid based on high grade coke particle
Carrier, another part are then the high temperature cementing agent based on various eutectic inorganic salts.（4）Cinder coverture.
Using lead pan coverture carry out lead contamination prevention effect how, be critically depend on the performance and feature of coverture.
Different its effect of lead pan coverture are also not quite similar.Good lead pan coverture not only has the function of preferable lead contamination prevention,
And can reach energy-saving, ensure the effect of product quality.Generally speaking, above-mentioned method respectively has disadvantage, can not be complete
The full up existing industry requirement of foot.The volatilization of lead during reduction lead bath, and the harm to human and environment, from the angle of materialogy
Degree say be exactly nothing but the evaporation rate or lead that reduce lead saturated vapour pressure.Patenting is can't be complete by other modes
Before substitution, with the superiority of own, interior presence will be asked when longer.The prevention of lead contamination for caused by patenting
It is still an important topic of our research and probes.
Oneself the external performance of the lead pan coverture through exploitation can't be satisfactory.Exploitation has the novel of extremely low lead vapour pressure
There are two types of methods for metal, and one is alloying element is added to reduce the activity of lead, another kind by thermodynamic (al) reciprocation
It is to form the oxide and nitride of low melting point by the way that specific alloying element is added, to open lead bath and air exclusion
Come.In addition, when increasing the yield of unit interval without in addition increasing number of devices, the lead material of lead bath alloy is needed to have
There is higher thermal capacitance value.In this way when more heats are entered from steel cord in lead bath, the temperature raising of lead bath is not obvious.
Thus, the metal using big thermal capacitance is a kind of effective means for improving lead bath alloy production efficiency.Ca and Sn are as alloying
Element, which is added in metal, can substantially reduce the lead vapour pressure on lead-pot furnace surface, and be obviously improved the thermal capacitance of lead bath alloy
Value.With the rapid industrial development in our country, exploitation die casting has become certainty with novel metal.
The feature of lead-calcium alloy maximum is during smelting and use because lead-calcium alloy melt is easy oxidizing fire, life
At fine and close oxidation film and nitride film.The bath surface compound film of this densification can effectively prevent lead steam waving into air
Hair.That is, being reached by the method for alloying prevents the volatilization of lead calcium and problem of oxidation during heat treatment, it is to solve
One of the developing direction of lead bath Heat-treatment Problem.The mechanism that alloying prevents lead from volatilizing in fusion process is to add in the alloy
Alloying element influences the thermodynamics and dynamics process of alloy oxidation.The fine and close oxygen with protective effect is formed in alloy surface
Change film and nitride film, reaches and prevent the drastically evaporation and oxidation of lead at high temperature.Compared with lead pan coverture, alloying prevents lead
Volatilization can eliminate flux and be mingled in fusion process, reduce the pollution to air.
Invention content
The purpose of the present invention is to overcome the deficiency in the prior art, and providing one kind can have under 480-550 degree atmospheric conditions
There are the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity.The alloy carries out troostite in this temperature range to steel cord
When changing heat treatment, not only have the institute of common lead bath heat treatment functional.Its resistance to oxidation and thermal capacitance performance are also significantly larger than existing
Metal.This method also has production cost low, the characteristics of being convenient for mass producing.
To achieve the goals above, the present invention adopts the following technical scheme that：
One kind having the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity.By weight percentage, the composition of alloy
For：Ca: 1.0-1.8wt.%,Sn:5.0-8.0wt.% ,Mg:2.0-4.0wt.%,Ge：1.5-3.0wt.%, Nb:1.0-
2.0wt.%, Sc:0.5-1.0wt.%, surplus are lead.The lead-calcium alloy is in fusion process because of the reasons such as volatilization and formation clinker
And the weight lost is in 1.0-3.0wt.% or so.
The above-mentioned preparation method with the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity, including walk as follows
Suddenly：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Sensing heating is to 500-
600 degree are formed alloy solution, and are sufficiently stirred 10 minutes or so using electromagnetic agitation effect；By alloy liquid in 500-600 degree
Heat preservation, which stands to be cast to after ten minutes in the same level equipment of heat top, carries out semi-continuous casting into required billet, and ingot casting moves down speed
Degree is 10-20m/min.The ingot casting can be heat-treated for the lead bath of subsequent handling to be bent to steel cord as lead bath raw material
Family name's gymnastics is made；Wherein, the temperature in use of lead bath alloy is 480-550 degree.
Compared with prior art, the present invention has the advantages that：
（1）Patent of the present invention provides one for the bad state of the resistance to volatilization of current steel cord lead bath lead and oxidation resistent susceptibility
The novel materialogy solution of kind.The alloy has extremely excellent resistance to volatilization and resistance to oxidation, can reach in 480-550 degree
5 hours are stood without significantly aoxidizing under atmospheric environment in temperature range.The liquid metal is being stirred, is being blown
During the melt treatments such as gas, after its skin covering of the surface is destroyed because being vigorously stirred, energy rapid regeneration successfully hinders the oxidation of alloy
And volatilization.And the weight that the lead-calcium alloy loses in fusion process because of the reasons such as volatilization and formation clinker is less than 3.0wt.%
Left and right.
（2）Traditional lead bath is heat-treated, a concentration of 280-320mg/m of lead steam is detected above lead bath pond3.Compare and
Speech, novel lead bath resistance to volatilization resistance to oxidation Pb-Ca-Fe metals, a concentration of 30-40mg/ of lead steam designed using this patent
m3.Compared with before covering, lead steam concentration reduces 80% or more.At 500 degree, the thermal capacitance of the metal is 42-48J/mol
K, and the thermal capacitance of traditional lead bath alloy is 30-35 J/molK.When in addition the yield of increase unit interval is without increasing number of devices
When amount, when more heats are entered from steel cord in lead bath, the temperature raising of lead bath is not obvious.Thus, using big
The metal of thermal capacitance is a kind of effective means for improving lead bath alloy production efficiency.
（3）It can be effectively reduced the volatilization of lead during lead bath, reduce the harm of human and environment.It is best that lead effect drops,
Validity period is long, and does not influence the quality of steel wire patenting, is convenient for operation, and year consuming fund is also less, is steel wire lead-pot furnace
Preferred drop lead method in quenching production.
Specific implementation mode
Embodiment 1
One kind is at 490 degree using with the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity.By weight percentage,
The chemical composition of alloy is：Ca: 1.2wt.%,Sn:5.4wt.% ,Mg:2.8wt.%,Ge：1.6wt.%, Nb:1.5wt.%,
Sc:0.8wt.%, surplus are lead.The preparation method of alloy：As above the raw material matched is added to the electric induction furnace of atmosphere protection
It is interior, and use silicon carbide crucible；Sensing heating forms alloy solution to 550 degree, and is sufficiently stirred 10 using electromagnetic agitation effect
Minute or so；Alloy liquid is kept the temperature to stand to be cast to after ten minutes in the same level equipment of heat top at 550 degree and carries out semicontinuous casting
Required billet is caused, it is 16m/min that ingot casting, which moves down speed,.The ingot casting can regard the lead that lead bath raw material is used for subsequent handling
Bath heat treatment to carry out troostite operation to steel cord；Wherein, the temperature in use of lead bath alloy is 480-550 degree.
The alloy has extremely excellent resistance to volatilization and resistance to oxidation, can reach in 480-550 degree temperature ranges big
5 hours are stood under compression ring border without significantly aoxidizing.The melt treatments mistake such as the liquid metal is being stirred, is being blown
Cheng Zhong, after its skin covering of the surface is destroyed because being vigorously stirred, energy rapid regeneration successfully hinders the oxidation and volatilization of alloy.And the lead
Calcium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 3.0wt.% or so.For tradition
Lead bath is heat-treated, and a concentration of 280-320mg/m of lead steam is detected above lead bath pond3.In comparison, using this patent design
Novel lead bath resistance to volatilization resistance to oxidation Pb-Ca-Fe metals, a concentration of 38mg/m of lead steam3.Compared with before covering, lead steam
Concentration reduces 80% or more.At 500 degree, the thermal capacitance of the metal is 46J/molK, and the thermal capacitance of traditional lead bath alloy is
30-35 J/mol·K.When increasing the yield of unit interval without in addition increasing number of devices, more heats are from steel
When cord is entered in lead bath, the temperature raising of lead bath is not obvious.Thus, the metal using big thermal capacitance is to improve lead bath to close
A kind of effective means of golden production efficiency.It can be effectively reduced the volatilization of lead during lead bath, reduce the harm of human and environment.
Drop lead effect is best, and validity period is long, and does not influence the quality of steel wire patenting, is convenient for operation, and year consuming fund is also less,
For the preferred drop lead method in the quenching production of steel wire lead-pot furnace.The lead-calcium alloy is in fusion process because of volatilization and formation clinker etc.
Reason and the weight lost are in 1.8wt.% or so.
Embodiment 2
One kind is at 520 degree using with the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity.By weight percentage.It presses
The chemical composition of weight percent meter, alloy is：Ca: 1.5wt.%,Sn:5.8wt.% ,Mg:2.7wt.%,Ge：1.6wt.%,
Nb:1.4wt.%, Sc:0.9wt.%, surplus are lead.The preparation method of alloy：As above the raw material matched is added to atmosphere protection
Electric induction furnace in, and use silicon carbide crucible；Sensing heating forms alloy solution to 550 degree, and utilizes electromagnetic agitation effect
It is sufficiently stirred 10 minutes or so；Alloy liquid is kept the temperature at 550 degree standing be cast to after ten minutes in the same level equipment of heat top into
At required billet, it is 14m/min that ingot casting, which moves down speed, for row semi-continuous casting.After the ingot casting can be used for as lead bath raw material
The lead bath heat treatment of continuous process to carry out troostite operation to steel cord；Wherein, the temperature in use of lead bath alloy is 480-550
Degree.
The alloy has extremely excellent resistance to volatilization and resistance to oxidation, can reach in 480-550 degree temperature ranges big
5 hours are stood under compression ring border without significantly aoxidizing.The melt treatments mistake such as the liquid metal is being stirred, is being blown
Cheng Zhong, after its skin covering of the surface is destroyed because being vigorously stirred, energy rapid regeneration successfully hinders the oxidation and volatilization of alloy.And the lead
Calcium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 3.0wt.% or so.For tradition
Lead bath is heat-treated, and a concentration of 280-320mg/m of lead steam is detected above lead bath pond3.In comparison, using this patent design
Novel lead bath resistance to volatilization resistance to oxidation Pb-Ca-Fe metals, a concentration of 35mg/m of lead steam3.Compared with before covering, lead steam
Concentration reduces 80% or more.At 500 degree, the thermal capacitance of the metal is 45J/molK, and the thermal capacitance of traditional lead bath alloy is
30-35 J/mol·K.When increasing the yield of unit interval without in addition increasing number of devices, more heats are from steel
When cord is entered in lead bath, the temperature raising of lead bath is not obvious.Thus, the metal using big thermal capacitance is to improve lead bath to close
A kind of effective means of golden production efficiency.It can be effectively reduced the volatilization of lead during lead bath, reduce the harm of human and environment.
Drop lead effect is best, and validity period is long, and does not influence the quality of steel wire patenting, is convenient for operation, and year consuming fund is also less,
For the preferred drop lead method in the quenching production of steel wire lead-pot furnace.The lead-calcium alloy is in fusion process because of volatilization and formation clinker etc.
Reason and the weight lost are in 2.1wt.% or so.
Embodiment 3
One kind is at 540 degree using with the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity.By weight percentage.It presses
The chemical composition of weight percent meter, alloy is：Ca: 1.6wt.%,Sn:6.4wt.% ,Mg:3.5wt.%,Ge：1.8wt.%,
Nb:1.5wt.%, Sc:0.8wt.%, surplus are lead.The preparation method of alloy：As above the raw material matched is added to atmosphere protection
Electric induction furnace in, and use silicon carbide crucible；Sensing heating forms alloy solution to 550 degree, and utilizes electromagnetic agitation effect
It is sufficiently stirred 10 minutes or so；Alloy liquid is kept the temperature at 550 degree standing be cast to after ten minutes in the same level equipment of heat top into
At required billet, it is 18m/min that ingot casting, which moves down speed, for row semi-continuous casting.After the ingot casting can be used for as lead bath raw material
The lead bath heat treatment of continuous process to carry out troostite operation to steel cord；Wherein, the temperature in use of lead bath alloy is 480-550
Degree.
The alloy has extremely excellent resistance to volatilization and resistance to oxidation, can reach in 480-550 degree temperature ranges big
5 hours are stood under compression ring border without significantly aoxidizing.The melt treatments mistake such as the liquid metal is being stirred, is being blown
Cheng Zhong, after its skin covering of the surface is destroyed because being vigorously stirred, energy rapid regeneration successfully hinders the oxidation and volatilization of alloy.And the lead
Calcium alloy is in fusion process because the weight for volatilizing and forming the reasons such as clinker and losing is less than 3.0wt.% or so.For tradition
Lead bath is heat-treated, and a concentration of 280-320mg/m of lead steam is detected above lead bath pond3.In comparison, using this patent design
Novel lead bath resistance to volatilization resistance to oxidation Pb-Ca-Fe metals, a concentration of 35mg/m of lead steam3.Compared with before covering, lead steam
Concentration reduces 80% or more.At 500 degree, the thermal capacitance of the metal is 45J/molK, and the thermal capacitance of traditional lead bath alloy is
30-35 J/mol·K.When increasing the yield of unit interval without in addition increasing number of devices, more heats are from steel
When cord is entered in lead bath, the temperature raising of lead bath is not obvious.Thus, the metal using big thermal capacitance is to improve lead bath to close
A kind of effective means of golden production efficiency.It can be effectively reduced the volatilization of lead during lead bath, reduce the harm of human and environment.
Drop lead effect is best, and validity period is long, and does not influence the quality of steel wire patenting, is convenient for operation, and year consuming fund is also less,
For the preferred drop lead method in the quenching production of steel wire lead-pot furnace.The lead-calcium alloy is in fusion process because of volatilization and formation clinker etc.
Reason and the weight lost are in 1.2wt.% or so.
Claims (3)
1. one kind having the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity；According to weight percent, the alloy
Ingredient is：Ca: 1.0-1.8wt.%,Sn:5.0-8.0wt.% ,Mg:2.0-4.0wt.%,Ge：1.5-3.0wt.%, Nb:1.0-
2.0wt.%, Sc:0.5-1.0wt.%, surplus are lead.
2. having the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity according to claim 1, it is characterised in that
Include the following steps：As above the raw material matched is added in the electric induction furnace of atmosphere protection, and uses silicon carbide crucible；Induction
It is heated to 500-600 degree and forms alloy solution, and be sufficiently stirred 10 minutes or so using electromagnetic agitation effect；Alloy liquid is existed
The heat preservation of 500-600 degree, which stands to be cast to after ten minutes in the same level equipment of heat top, carries out semi-continuous casting into required billet,
It is 10-20m/min that ingot casting, which moves down speed,.
3. having the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity according to claim 1, it is characterised in that
Including following procedure of processing：The ingot casting can be heat-treated to carry out steel cord as lead bath raw material for the lead bath of subsequent handling
Troostite operates；Wherein, the temperature in use of lead bath alloy is 480-550 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278654.9A CN108359844A (en) | 2018-03-31 | 2018-03-31 | With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278654.9A CN108359844A (en) | 2018-03-31 | 2018-03-31 | With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108359844A true CN108359844A (en) | 2018-08-03 |
Family
ID=63001919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810278654.9A Withdrawn CN108359844A (en) | 2018-03-31 | 2018-03-31 | With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108359844A (en) |
-
2018
- 2018-03-31 CN CN201810278654.9A patent/CN108359844A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023197572A1 (en) | 500 hb grade or above abrasion-resistant steel and production method therefor | |
| CN109055770A (en) | A kind of electroslag remelting slag and it is used for electroslag remelting 40CrNiMoA low hydrogen control method | |
| CN108359844A (en) | With the resistance to volatilization steel cord lead bath Pb-Ca-Sn metals of high heat capacity | |
| CN103866188A (en) | Fire-resistant corrosion-resistant anti-seismic construction steel with yield strength of 460MPa and production method | |
| CN108330322A (en) | Have high thermal conductivity steel cord lead bath Pb-Ca-Sb metals | |
| CN108359843A (en) | The resistance to volatilization resistance to oxidation Pb-Ca-Fe metals of steel cord lead bath | |
| CN108285957A (en) | It is heat-treated lead bath high heat conduction high temperature resistant chloride salt coverture | |
| CN108467925A (en) | Has excellent heat transfer property lead bath heat treatment with containing aluminium and silico-aluminum coverture | |
| CN108342548A (en) | A kind of novel heat treatment of troostite containing Re unleaded magnesium bath alloy | |
| CN108467924A (en) | The novel covering alloy containing Al and Zn of low melting point high heat conduction lead bath | |
| CN108467926A (en) | A kind of aluminium germanium alloy coverture that can reduce lead bath alloy evaporation rate | |
| CN108193106A (en) | Lead bath heat treatment environment-friendly type aluminum bronze base high heat conduction covering aluminium copper | |
| CN108359858A (en) | It is heat-treated the resistance to volatilization of lead bath high heat conduction and covers aluminium alloy containing Sr and Mg | |
| CN109457185A (en) | A kind of 430 ferrite antibacterial stainless steel of hot rolling and preparation method thereof | |
| CN108342549A (en) | The bath alloy of magnesium containing Cr in troostite heat treatment for substituting lead bath | |
| CN108359848A (en) | Troostiteization is heat-treated lead bath and covers aluminium alloy with high heat capacity | |
| CN108330348A (en) | Steel wire lead bath covers aluminium alloy with resistance to volatilization containing Sr and Mn | |
| CN108467927A (en) | The lead bath for having high heat capacity is substituted with the bath alloy of magnesium containing Os | |
| CN108411153A (en) | Substitute heat treatment antimony alloy of the lead bath high heat conduction containing Re and In | |
| CN108285959A (en) | Has the lead-pot furnace chloride salt protective agent of oxidation proof propertiess | |
| CN108342547A (en) | Close to eutectic composition lead bath containing Fe-Co-Ni covering aluminium alloy | |
| CN108456771A (en) | A kind of lead bath heat treatment covering alloy containing chromium and manganese | |
| CN108193082A (en) | Substitute heat treatment antimony alloy of the lead bath high heat capacity containing Os and Bi | |
| CN108285958A (en) | It is heat-treated the resistance to volatilization chloride coverture of lead bath with high heat capacity | |
| CN108531772A (en) | Troostite heat treatment bathes alloy with unleaded containing In and Ta bismuths |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180803 |