CN105241889A - Acid pickling method for inspecting surface grinding burns of bearing steel bearing part - Google Patents
Acid pickling method for inspecting surface grinding burns of bearing steel bearing part Download PDFInfo
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- CN105241889A CN105241889A CN201510779988.0A CN201510779988A CN105241889A CN 105241889 A CN105241889 A CN 105241889A CN 201510779988 A CN201510779988 A CN 201510779988A CN 105241889 A CN105241889 A CN 105241889A
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Abstract
The invention provides an acid pickling method for inspecting surface grinding burns of a bearing steel bearing part, and relates to a method for inspecting the surface grinding burns of the bearing steel bearing part. According to the acid pickling method, the problem that during existing bearing steel part acid pickling, due to the fact that the corrosion speed is too high, production control is not facilitated and hanger prints are prone to being generated on the contact portions of a hanger and the inner diameter of an internal ring and not prone to being removed in subsequent processing, and the appearance print phenomenon is caused when an internal ring finished product is inspected is solved. The acid pickling method comprises the steps of hanger loading, degreasing, hot water washing, cold water washing, continuous water film inspecting, nitric acid pickling, first-time flowing cold water washing, hydrochloric acid brightening, second-time flowing cold water washing, neutralizing treating, third-time flowing cold water washing, rust-proof treating, hanger unloading and burn inspecting, and then the acid pickling method for inspecting the surface grinding burns of the bearing steel bearing part is completed. The acid pickling method is used for inspecting the surface grinding burns of the bearing steel bearing part.
Description
Technical field
The present invention relates to the method checking bearing steel bearing parts surfacing burn.
Background technology
Bearing steel (GCr15, ZGCr15) bearing parts processed is easy in Grinding Process because some reasons produce grinding burn, as grinding parameter violation technological requirement, equipment failure, apply unaccommodated abrasive material and liquid coolant performance bad etc., if be employed with the bearing products of grinding burn defect, such bearing stressedly can produce fatigue flake or cracked through operating, and directly has influence on serviceable life and the safety of a whole set of bearing.
In order to prevent entering assembling and follow-up use with grinding burn faulty goods, prior art adopts the method for single sour cold pickling to carry out pickling test to the bearing steel workpieces after mill processing, can effectively check and control grinding burn, ensure serviceable life and the reliability of bearing steel (GCr15, ZGCr15) bearing processed.
Bearing steel product acid is washed to the method checking grinding burn, effectively to control acid cleaning process and check product grinding burn, not only to select suitable Ingredients in Acid Pickling Solution and proportioning, determine rational acid cleaning process flow process and technological parameter, also to determine effective grinding burn check criteria, and carry out process control.
Prior art finds that in production application bearing steel (conventional tempering, T, T1 and T2) inner sleeve product inside diameter surface often has " trace " phenomenon to occur, this is unfavorable for production control due to during Bearing Steel Parts pickling because corrosion speed is too fast, easily produce heavier hanger at hanger and inside race internal diameter contact site to print, not easily remove again in postorder processing (light decorations), inner ring finished product is caused to hand over outward appearance " trace " phenomenon when examining, affect product quality, cause and do over again.
Summary of the invention
The present invention is unfavorable for production control because corrosion speed is too fast when will solve existing Bearing Steel Parts pickling, easily produce heavier hanger at hanger and inside race internal diameter contact site to print, not easily remove again in postorder processing, inner ring finished product is caused to hand over outward appearance " trace " phenomenon when examining, affect product quality, cause the problem of doing over again, and a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks is provided.
Check and the acid washing method that bearing steel bearing parts surfacing is burnt specifically carry out according to following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by beating steel GCr15 or bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 75 DEG C ~ 95 DEG C soaks and shakes 5min ~ 10min simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5% ~ 3.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5% ~ 3.5%, and in described degreaser, the percent by volume of NaOH is 1% ~ 2%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 75 DEG C ~ 85 DEG C soaks and shakes 1min ~ 2min simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Water bearing parts after hot water wash being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
If fracture in the moisture film 30s on the bearing parts surface after cold wash, then repeat step one to four, until bearing parts surface after cold wash at least 30s rupture without moisture film, obtain the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The salpeter solution bearing parts that surface is completely moistening being placed in room temperature soaks shakes 10s ~ 60s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 1% ~ 2%;
Described nitric acid to be mass percent be 65% ~ 68% nitric acid;
Seven, flowing cool water is washed for the first time:
Circulating water bearing parts after nitric acid acidwashing being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the first time washed;
Eight, hydrochloric acid brightization:
The hydrochloric acid solution bearing parts that first time flowing cool water is washed being placed in room temperature soaks shakes 15s ~ 45s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4% ~ 6%;
Described hydrochloric acid to be mass percent be 36% ~ 38% hydrochloric acid;
Nine, second time flowing cool water is washed:
Circulating water bearing parts after hydrochloric acid brightization being placed in room temperature soaks shakes 3min ~ 5min simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The neutralization solution bearing parts that second time flowing cool water is washed being placed in room temperature soaks shakes 5min ~ 30min simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3% ~ 5%;
11: flowing cool water is washed for the third time:
Circulating water bearing parts after neutralisation treatment being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the third time washed;
12: antirust treatment:
The rust inhibiting solution bearing parts that third time flowing cool water is washed being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1% ~ 2%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8% ~ 10%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks.
The invention has the beneficial effects as follows: the present invention is a kind of checks the acid washing method that bearing steel bearing parts surfacing is burnt, bearing steel (GCr15, ZGCr15) bearing parts processed uses the method for this kind of pickling test surfacing burn, can effectively ensure to detect part grinding burn, avoid the imprint phenomenon of rear operation, improve product surface presentation quality, completely solve the production bottleneck problem existed early stage.
The present invention checks for a kind of the acid washing method that bearing steel bearing parts surfacing is burnt.
Accompanying drawing explanation
Fig. 1 is the defective bearing outside picture after the grinding burn that obtains of embodiment one checks;
Fig. 2 is the defective bearing outside picture after the grinding burn that obtains of embodiment two checks;
Fig. 3 is the defective bearing outside picture after the grinding burn that obtains of embodiment three checks;
Fig. 4 is that embodiment three finished product hands over the picture not occurring product appearance during inspection;
For there is the picture of product appearance " trace " when contrast experiment's finished product is handed over and examined in Fig. 5.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the combination in any between each embodiment.
Embodiment one: a kind of described in present embodiment checks the acid washing method that bearing steel bearing parts surfacing is burnt, and specifically carries out according to following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by beating steel GCr15 or bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 75 DEG C ~ 95 DEG C soaks and shakes 5min ~ 10min simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5% ~ 3.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5% ~ 3.5%, and in described degreaser, the percent by volume of NaOH is 1% ~ 2%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 75 DEG C ~ 85 DEG C soaks and shakes 1min ~ 2min simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Water bearing parts after hot water wash being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
If fracture in the moisture film 30s on the bearing parts surface after cold wash, then repeat step one to four, until bearing parts surface after cold wash at least 30s rupture without moisture film, obtain the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The salpeter solution bearing parts that surface is completely moistening being placed in room temperature soaks shakes 10s ~ 60s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 1% ~ 2%;
Described nitric acid to be mass percent be 65% ~ 68% nitric acid;
Seven, flowing cool water is washed for the first time:
Circulating water bearing parts after nitric acid acidwashing being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the first time washed;
Eight, hydrochloric acid brightization:
The hydrochloric acid solution bearing parts that first time flowing cool water is washed being placed in room temperature soaks shakes 15s ~ 45s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4% ~ 6%;
Described hydrochloric acid to be mass percent be 36% ~ 38% hydrochloric acid;
Nine, second time flowing cool water is washed:
Circulating water bearing parts after hydrochloric acid brightization being placed in room temperature soaks shakes 3min ~ 5min simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The neutralization solution bearing parts that second time flowing cool water is washed being placed in room temperature soaks shakes 5min ~ 30min simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3% ~ 5%;
11: flowing cool water is washed for the third time:
Circulating water bearing parts after neutralisation treatment being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the third time washed;
12: antirust treatment:
The rust inhibiting solution bearing parts that third time flowing cool water is washed being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1% ~ 2%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8% ~ 10%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks.
In this embodiment step 6 at room temperature, the bearing parts that surface is completely moistening is placed in salpeter solution and soaks and shake 10s ~ 60s simultaneously, observe surface corrosion color and only become light gray.
Natrium carbonicum calcinatum described in this embodiment step 2 meets GB/T639, belongs to chemical pure CP/500g or higher level; Described tertiary sodium phosphate meets HG/T2517, belongs to chemical pure CP/500g or higher level; Described NaOH meets GB/T629, belongs to chemical pure CP/500g or higher level;
Salpeter solution described in this embodiment step 6 meets GB/T626, belongs to the pure GR/2500mL of top grade;
HCl described in this embodiment step 8 meets GB/T622, belongs to the pure GR/2500mL of top grade;
Natrium carbonicum calcinatum described in this embodiment step 10 meets GB/T639, belongs to chemical pure CP/500g or higher level;
Natrium carbonicum calcinatum described in this embodiment step 12 meets GB/T639, belongs to chemical pure CP/500g or higher level; Described sodium nitrite meets GB/T633, belongs to chemical pure CP/500g or higher level.
Deionized water described in this embodiment step one to 14 is conductivity < 20 μ s/cm.
Carry out burn inspection to the bearing parts after lower hanger in this embodiment step 14, check criteria is as follows:
The working surface of bearing steel (GCr15, ZGCr15) workpieces, the end face of lasso have not allowed burn.Burn has two states, and a kind of is tempering burn, and a kind of is quenched damage (reharden burn).
Tempering is burnt: workpiece area is dimmed, deepens blackening with pickling, extremely black by shallow palm fibre relative to peripheral region.Edge is obviously clear, along machine direction.
Quenching (rehardening) burn: workpiece area is because pickling is from light gray in vain, and periphery is light brown or black.
The beneficial effect of present embodiment is: present embodiment is a kind of checks the acid washing method that bearing steel bearing parts surfacing is burnt, bearing steel (GCr15, ZGCr15) bearing parts processed uses the method for this kind of pickling test surfacing burn, can effectively ensure to detect part grinding burn, avoid the imprint phenomenon of rear operation, improve product surface presentation quality, completely solve the production bottleneck problem existed early stage.
Embodiment two: present embodiment and embodiment one unlike: in step 6, the bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 40s simultaneously.Other is identical with embodiment one.
Embodiment three: one of present embodiment and embodiment one or two unlike: in the salpeter solution described in step 6, the percent by volume of nitric acid is 1%.Other is identical with embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three unlike: in step 6, the bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 28s simultaneously.Other is identical with embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four unlike: in the salpeter solution described in step 6, the percent by volume of nitric acid is 1.5%.Other is identical with embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five unlike: the bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 17s simultaneously.Other is identical with embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six unlike: in the salpeter solution described in step 6, the percent by volume of nitric acid is 2%.Other is identical with embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven unlike: in step 8, the bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 32s simultaneously.Other is identical with embodiment one to seven.
Embodiment nine: one of present embodiment and embodiment one to eight unlike: in step 8, the bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 35s simultaneously.Other is identical with embodiment one to eight.
Embodiment ten: one of present embodiment and embodiment one to nine unlike: in step 8, the bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 33s simultaneously.Other is identical with embodiment one to nine.
Following examples are adopted to verify beneficial effect of the present invention:
Embodiment one:
Checking the acid washing method that bearing steel bearing parts surfacing is burnt, is carry out according to the following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 88 DEG C soaks and shakes 5min50s simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5%, and in described degreaser, the percent by volume of NaOH is 1%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 80 DEG C soaks and shakes 1min45s simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Bearing parts after hot water wash being placed in temperature is that the water of 12 DEG C soaks and shakes 1min20s simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
Rupturing without moisture film in bearing parts surface after cold wash at least 30s, obtains the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 40s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 1%;
Described nitric acid to be mass percent be 65% ~ 68% nitric acid;
Seven, flowing cool water is washed for the first time:
Bearing parts after nitric acid acidwashing being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 1min50s simultaneously, obtains the first time bearing parts washed of flowing cool water;
Eight, hydrochloric acid brightization:
The bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 32s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4%;
Described hydrochloric acid to be mass percent be 36% hydrochloric acid;
Nine, second time flowing cool water is washed:
Bearing parts after hydrochloric acid brightization is placed at temperature is soak in the circulating water of 12 DEG C to shake 3min05s simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The bearing parts that second time flowing cool water is washed being placed in temperature is that the neutralization solution of 14 DEG C soaks and shakes 5min2s simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3%;
11: flowing cool water is washed for the third time:
Bearing parts after neutralisation treatment being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 1min simultaneously, obtains the third time bearing parts washed of flowing cool water;
12: antirust treatment:
The bearing parts that third time flowing cool water is washed being placed in temperature is that the rust inhibiting solution of 14 DEG C soaks and shakes 1min simultaneously, obtains the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks;
Bearing parts described in the present embodiment step one is T2 tempering bearing steel overcoat product 550.
Fig. 1 is the defective bearing outside picture after the grinding burn that obtains of embodiment one checks; As seen from the figure, the present embodiment inspection method effectively can detect burn, and comparatively obviously easily distinguishes.
Embodiment two:
Checking the acid washing method that bearing steel bearing parts surfacing is burnt, is carry out according to the following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 88 DEG C soaks and shakes 5min35s simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5%, and in described degreaser, the percent by volume of NaOH is 1%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 80 DEG C soaks and shakes 1min26s simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Bearing parts after hot water wash being placed in temperature is that the water of 12 DEG C soaks and shakes 1min37s simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
Rupturing without moisture film in bearing parts surface after cold wash at least 30s, obtains the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 28s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 1.5%;
Described nitric acid to be mass percent be 65% nitric acid;
Seven, flowing cool water is washed for the first time:
Bearing parts after nitric acid acidwashing being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 1min55s simultaneously, obtains the first time bearing parts washed of flowing cool water;
Eight, hydrochloric acid brightization:
The bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 35s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4%;
Described hydrochloric acid to be mass percent be 36% hydrochloric acid;
Nine, second time flowing cool water is washed:
Bearing parts after hydrochloric acid brightization being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 3min10s simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The bearing parts that second time flowing cool water is washed being placed in temperature is that the neutralization solution of 14 DEG C soaks and shakes 5min7s simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3%;
11: flowing cool water is washed for the third time:
Bearing parts after neutralisation treatment being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 1min simultaneously, obtains the third time bearing parts washed of flowing cool water;
12: antirust treatment:
Third time the bearing parts washed of flowing cool water to be placed in temperature be that the rust inhibiting solution of 14 DEG C soaks and shakes 1min simultaneously, obtain the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks;
Bearing parts described in the present embodiment step one is T2 tempering bearing steel overcoat product 550.
Fig. 2 is the defective bearing outside picture after the grinding burn that obtains of embodiment two checks; As seen from the figure, the present embodiment inspection method effectively can detect burn, and comparatively obviously easily distinguishes.
Embodiment three:
Checking the acid washing method that bearing steel bearing parts surfacing is burnt, is carry out according to the following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 88 DEG C soaks and shakes 5min42s simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5%, and in described degreaser, the percent by volume of NaOH is 1%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 80 DEG C soaks and shakes 1min35s simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Bearing parts after hot water wash being placed in temperature is that the water of 12 DEG C soaks and shakes 1min32s simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
Rupturing without moisture film in bearing parts surface after cold wash at least 30s, obtains the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The bearing parts that surface is completely moistening being placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 17s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 2%;
Described nitric acid to be mass percent be 65% nitric acid;
Seven, flowing cool water is washed for the first time:
Bearing parts after nitric acid acidwashing being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 2min simultaneously, obtains the first time bearing parts washed of flowing cool water;
Eight, hydrochloric acid brightization:
The bearing parts that first time flowing cool water is washed being placed in temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 33s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4%;
Described hydrochloric acid to be mass percent be 36% hydrochloric acid;
Nine, second time flowing cool water is washed:
Bearing parts after hydrochloric acid brightization being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 3min06s simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The bearing parts that second time flowing cool water is washed being placed in temperature is that the neutralization solution of 14 DEG C soaks and shakes 5min8s simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3%;
11: flowing cool water is washed for the third time:
Bearing parts after neutralisation treatment being placed in temperature is that the circulating water of 12 DEG C soaks and shakes 1min simultaneously, obtains the third time bearing parts washed of flowing cool water;
12: antirust treatment:
The bearing parts that third time flowing cool water is washed being placed in temperature is that the rust inhibiting solution of 14 DEG C soaks and shakes 1min simultaneously, obtains the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks;
Bearing parts described in the present embodiment step one is T2 tempering bearing steel overcoat product and bearing steel inner sleeve product 550.
Fig. 3 is the defective bearing outside picture after the grinding burn that obtains of embodiment three checks; As seen from the figure, the present embodiment inspection method effectively can detect burn, and comparatively obviously easily distinguishes.
Contrast experiment: the present embodiment and embodiment three unlike: at temperature is 14 DEG C, the bearing parts that surface is completely moistening is placed in salpeter solution and soaks and shake 5s simultaneously, obtain the bearing parts after nitric acid acidwashing; Described salpeter solution is the HNO of 3% by percent by volume
3form with the deionized water of surplus.Other is identical with embodiment three.
Embodiment one to three and the natrium carbonicum calcinatum described in contrast experiment's step 2 meet GB/T639, belong to chemical pure CP/500g or higher level; Described tertiary sodium phosphate meets HG/T2517, belongs to chemical pure CP/500g or higher level; Described NaOH meets GB/T629, belongs to chemical pure CP/500g or higher level;
Embodiment one to three and the salpeter solution described in contrast experiment's step 6 meet GB/T626, belong to the pure GR/2500mL of top grade;
Embodiment one to three and the HCl described in contrast experiment's step 8 meet GB/T622, belong to the pure GR/2500mL of top grade;
Embodiment one to three and the natrium carbonicum calcinatum described in contrast experiment's step 10 meet GB/T639, belong to chemical pure CP/500g or higher level;
Embodiment one to three and the natrium carbonicum calcinatum described in contrast experiment's step 12 meet GB/T639, belong to chemical pure CP/500g or higher level; Described sodium nitrite meets GB/T633, belongs to chemical pure CP/500g or higher level.
Embodiment one to three and the deionized water described in contrast experiment's step one to 14 are conductivity < 20 μ s/cm.
Follow-up program is carried out for the qualified bearing inner sleeve after the grinding burn inspection that the qualified bearing inner sleeve after the grinding burn inspection that embodiment three obtains and contrast experiment obtain, under the same conditions, the internal diameter hanger that pickling of the present invention produces is imprinted in postorder processing (light decorations) and is all efficiently removed, finished product is handed over during inspection and is not occurred product appearance " trace " phenomenon, as shown in Figure 4, and contrast experiment's pickling produce internal diameter hanger be imprinted on postorder processing (light decorations) in be not efficiently removed, finished product is handed over during inspection and is occurred product appearance " trace " phenomenon, as shown in Figure 5.
Therefore, the method for the present invention's a kind of good bearing steel (GCr15, ZGCr15) bearing parts pickling test processed surfacing burn.
Claims (10)
1. check the acid washing method that bearing steel bearing parts surfacing is burnt, it is characterized in that a kind of acid washing method checking that bearing steel bearing parts surfacing is burnt carries out according to following steps:
One, upper extension:
By hanger on bearing parts, obtain the bearing parts after hanger;
Described bearing parts is prepared by beating steel GCr15 or bearing steel ZGCr15;
Two, degreasing:
Bearing parts after upper hanger being placed in temperature is that the degreaser of 75 DEG C ~ 95 DEG C soaks and shakes 5min ~ 10min simultaneously, obtains the bearing parts after degreasing;
Described degreaser is made up of natrium carbonicum calcinatum, tertiary sodium phosphate, NaOH and deionized water;
In described degreaser, the percent by volume of natrium carbonicum calcinatum is 2.5% ~ 3.5%; In described degreaser, the percent by volume of tertiary sodium phosphate is 2.5% ~ 3.5%, and in described degreaser, the percent by volume of NaOH is 1% ~ 2%;
Three, hot water wash:
Bearing parts after degreasing being placed in temperature is that the water of 75 DEG C ~ 85 DEG C soaks and shakes 1min ~ 2min simultaneously, obtains the bearing parts after hot water wash;
Four, cold wash:
Water bearing parts after hot water wash being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after cold wash;
Five, moisture film continuous review:
If fracture in the moisture film 30s on the bearing parts surface after cold wash, then repeat step one to four, until bearing parts surface after cold wash at least 30s rupture without moisture film, obtain the bearing parts that surface is completely moistening;
Six, nitric acid acidwashing:
The salpeter solution bearing parts that surface is completely moistening being placed in room temperature soaks shakes 10s ~ 60s simultaneously, obtains the bearing parts after nitric acid acidwashing;
Described salpeter solution is made up of nitric acid and deionized water; In described salpeter solution, the percent by volume of nitric acid is 1% ~ 2%;
Described nitric acid to be mass percent be 65% ~ 68% nitric acid;
Seven, flowing cool water is washed for the first time:
Circulating water bearing parts after nitric acid acidwashing being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the first time washed;
Eight, hydrochloric acid brightization:
The hydrochloric acid solution bearing parts that first time flowing cool water is washed being placed in room temperature soaks shakes 15s ~ 45s simultaneously, obtains the bearing parts after hydrochloric acid brightization;
Described hydrochloric acid solution is made up of hydrochloric acid and deionized water; In described hydrochloric acid solution, the percent by volume of hydrochloric acid is 4% ~ 6%;
Described hydrochloric acid to be mass percent be 36% ~ 38% hydrochloric acid;
Nine, second time flowing cool water is washed:
Circulating water bearing parts after hydrochloric acid brightization being placed in room temperature soaks shakes 3min ~ 5min simultaneously, obtains the bearing parts that second time flowing cool water is washed;
Ten, neutralisation treatment:
The neutralization solution bearing parts that second time flowing cool water is washed being placed in room temperature soaks shakes 5min ~ 30min simultaneously, obtains the bearing parts after neutralisation treatment;
Described neutralization solution is made up of the deionized water of natrium carbonicum calcinatum and surplus;
In described neutralization solution, the percent by volume of natrium carbonicum calcinatum is 3% ~ 5%;
11: flowing cool water is washed for the third time:
Circulating water bearing parts after neutralisation treatment being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts that flowing cool water is for the third time washed;
12: antirust treatment:
The rust inhibiting solution bearing parts that third time flowing cool water is washed being placed in room temperature soaks shakes 1min ~ 2min simultaneously, obtains the bearing parts after antirust treatment;
Described rust inhibiting solution is made up of natrium carbonicum calcinatum, sodium nitrite and deionized water;
In described rust inhibiting solution, the percent by volume of natrium carbonicum calcinatum is 1% ~ 2%; The percent by volume of described rust inhibiting solution Sodium Nitrite is 8% ~ 10%;
13: lower extension:
By hanger under the bearing parts after antirust treatment, obtain the bearing parts after lower hanger;
14, burn checks:
Burn inspection is carried out to the bearing parts after lower hanger, when bearing parts surface is along machine direction, occur becoming black from shallow palm fibre or becoming white from light gray, then for there is the defective bearing parts of grinding burn, other situations belong to qualified bearing parts, namely complete a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks.
2. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that being placed in by the bearing parts that surface is completely moistening in step 6 temperature is that the salpeter solution of 14 DEG C soaks and shakes 40s simultaneously.
3. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, is characterized in that the percent by volume of nitric acid in the salpeter solution described in step 6 is 1%.
4. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that being placed in by the bearing parts that surface is completely moistening in step 6 temperature is that the salpeter solution of 14 DEG C soaks and shakes 28s simultaneously.
5. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, is characterized in that the percent by volume of nitric acid in the salpeter solution described in step 6 is 1.5%.
6. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that the bearing parts that surface is completely moistening to be placed in temperature is that the salpeter solution of 14 DEG C soaks and shakes 17s simultaneously.
7. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, is characterized in that the percent by volume of nitric acid in the salpeter solution described in step 6 is 2%.
8. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that being placed in by the bearing parts that first time flowing cool water is washed in step 8 temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 32s simultaneously.
9. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that being placed in by the bearing parts that first time flowing cool water is washed in step 8 temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 35s simultaneously.
10. a kind of acid washing method that bearing steel bearing parts surfacing is burnt that checks according to claim 1, it is characterized in that being placed in by the bearing parts that first time flowing cool water is washed in step 8 temperature is that the hydrochloric acid solution of 14 DEG C soaks and shakes 33s simultaneously.
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| CN201510779988.0A CN105241889A (en) | 2015-11-13 | 2015-11-13 | Acid pickling method for inspecting surface grinding burns of bearing steel bearing part |
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Cited By (10)
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| CN106053478A (en) * | 2016-07-14 | 2016-10-26 | 浙江新昌展望机械有限公司 | Acid pickling method for bearing |
| CN106124426A (en) * | 2016-08-03 | 2016-11-16 | 中国人民解放军第五七九工厂 | A kind of pickling test method of grinding burn |
| CN106435609A (en) * | 2016-08-24 | 2017-02-22 | 瓦房店轴承集团有限责任公司 | Novel method for bearing part acid pickling |
| CN107090582A (en) * | 2017-04-26 | 2017-08-25 | 中国航发哈尔滨轴承有限公司 | A kind of bite method detected for the grinding burn of bearing parts surface |
| CN107192714A (en) * | 2017-06-01 | 2017-09-22 | 首钢总公司 | A kind of method and system for measuring Submerged Nozzle Clogging Course degree |
| CN107271537A (en) * | 2017-06-29 | 2017-10-20 | 中国航发哈尔滨轴承有限公司 | A kind of high-performance bearing grinding burn comprehensive test decision method |
| CN107764621A (en) * | 2017-10-09 | 2018-03-06 | 中国航发哈尔滨轴承有限公司 | A kind of bite method for stainless steel bearing parts surface grinding burn detection |
| CN108844962A (en) * | 2018-08-22 | 2018-11-20 | 洛阳Lyc轴承有限公司 | A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen |
| CN110967186A (en) * | 2019-11-20 | 2020-04-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for judging overheating color change trace of main bearing of aero-engine |
| CN114839030A (en) * | 2022-03-21 | 2022-08-02 | 洛阳轴承研究所有限公司 | Cold pickling solution for identifying surface defects of high-nitrogen stainless steel and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106053478A (en) * | 2016-07-14 | 2016-10-26 | 浙江新昌展望机械有限公司 | Acid pickling method for bearing |
| CN106124426A (en) * | 2016-08-03 | 2016-11-16 | 中国人民解放军第五七九工厂 | A kind of pickling test method of grinding burn |
| CN106435609A (en) * | 2016-08-24 | 2017-02-22 | 瓦房店轴承集团有限责任公司 | Novel method for bearing part acid pickling |
| CN107090582A (en) * | 2017-04-26 | 2017-08-25 | 中国航发哈尔滨轴承有限公司 | A kind of bite method detected for the grinding burn of bearing parts surface |
| CN107192714A (en) * | 2017-06-01 | 2017-09-22 | 首钢总公司 | A kind of method and system for measuring Submerged Nozzle Clogging Course degree |
| CN107271537A (en) * | 2017-06-29 | 2017-10-20 | 中国航发哈尔滨轴承有限公司 | A kind of high-performance bearing grinding burn comprehensive test decision method |
| CN107764621A (en) * | 2017-10-09 | 2018-03-06 | 中国航发哈尔滨轴承有限公司 | A kind of bite method for stainless steel bearing parts surface grinding burn detection |
| CN108844962A (en) * | 2018-08-22 | 2018-11-20 | 洛阳Lyc轴承有限公司 | A method of for detecting the anti-corrosion steel bearing parts manufacturing deficiency of high nitrogen |
| CN110967186A (en) * | 2019-11-20 | 2020-04-07 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for judging overheating color change trace of main bearing of aero-engine |
| CN110967186B (en) * | 2019-11-20 | 2021-07-23 | 中国航发沈阳黎明航空发动机有限责任公司 | Method for judging overheating color change trace of main bearing of aero-engine |
| CN114839030A (en) * | 2022-03-21 | 2022-08-02 | 洛阳轴承研究所有限公司 | Cold pickling solution for identifying surface defects of high-nitrogen stainless steel and application thereof |
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