CN1676652A - Wear-resistant hammer head and its manufacturing process - Google Patents
Wear-resistant hammer head and its manufacturing process Download PDFInfo
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Abstract
This invention is a wearable hammerhead and its facture technique, and relates to chemical components and facture of large hammer crusher. The chemical components are: C, 0.20-0.35%; Si, 0.1-0.37%; Mn, 1.3-1.6%; Cr, 1.4-2.5%; Mo, 0.15-0.30%; Ni, 0.10-0.30%; Cu, 0.0-1.20%, P<0.035%, S<0.035%; a little Re, and the is unavoidable impurities and Fe. The facture technique is: alloy melting->modifying treatment before furnace->casting->quenching->tempering, the hammerhead of this invention has good wearable ability and crushing toughness, and meets the demand of hammerhead of crushing machine. And the relating facture is simple and feasible, and the cost is low.
Description
Technical field the present invention relates to a kind of chemical ingredients and manufacturing process thereof of tup of hammer mill, the particularly chemical ingredients of the tup of large-scale hammer mill and manufacturing process thereof especially are used for pulverizing the chemical ingredients and the manufacturing process thereof of tup of the large-scale hammer mill of abandoned car.
During background technology hammer mill broken material, mainly be to utilize the tup of high speed rotating and the material impacting that eminence falls, with the material fragmentation, tup is the key part of hammer mill, also is vulnerable part, and high speed rotating hits material during tup work, not only be subjected to very high shock load, cut the formula abrasive wear but also be subjected to serious cutter, therefore require the material of preparation tup not only should possess enough shock proof abilities, but also must have good wear resistance.Traditional tup material is a high mangaenese steel, the tup made from it is through the tough processing of water, the Brinell hardness of using front surface is in HB200～250, the Brinell hardness of work back tup working face fluctuates between HB260～420, illustrate that sufficient work hardening phenomenon does not take place the high mangaenese steel tup in the course of the work, the wear-resistant potentiality of material are not brought into play, thereby wearing and tearing are very fast, its toughness of tup of using high mangaenese steel to make is had a surplus and hardness is on the low side, wears no resistance; The experimental study that uses rich chromium cast iron to make tup is also arranged, its hardness height, but toughness is low, seldom uses in actual production.
At present adopt large-scale hammer mill to pulverize the automobile of scrapping in industrially developed country such as America and Europes, the single weight of its tup is 200～500 kilograms, be 3～20 times of general tups, its thickness is greater than 120mm, the wearing piece that belongs to thick and large section, its speed of cooling of solidifying is slow, easily form thick primary solidification structure, the temperature difference of surface and heart portion is big in the heat treatment process, volumetric expansion or shrinkage are big, easily produce bigger thermal stresses and transformation stress, have the problem of two aspects when adopting the large-scale like this tup of high mangaenese steel preparation, its use wears no resistance on the one hand, its position of mounting hole was subjected to bigger tensile stress when large-scale on the other hand tup was worked, and surpassed the yield strength of high mangaenese steel, and plastic flow will take place, the size of open holes changes, and becomes ellipse by circle gradually.
The at present domestic example that does not adopt the large-scale like this tup of low alloy steel preparation, most of tup still adopts the high mangaenese steel manufacturing in China, and the tup size is little in light weight, nearly several kilograms or tens kilograms of monomer weight, the development report that adopts low-alloy to prepare small-sized tup was once arranged, there is the unreasonable and production technique instability of composition design, do not apply.
The purpose of summary of the invention this invention is to provide the hardness of a kind of hardness apparently higher than the high mangaenese steel of work hardening, have good wear resistance and impelling strength, satisfy the low wear-resistant hammer head and the manufacturing process thereof of production cost of the service requirements of hammer head of hammer crusher.
The present invention adopts following technical scheme to realize:
A kind of wear-resistant hammer head is characterized in that: the chemical composition of this wear-resistant hammer head and weight percentage thereof are: carbon C, 0.20～0.35%; Silicon Si, 0.17～0.37%; Manganese Mn, 1.3～1.6%; Chromium Cr, 1.4～2.5%; Molybdenum Mo, 0.15～0.30%; Nickel, 0.10～0.30%; Copper Cu, 0.0～1.20%; Phosphorus P＜0.035%; Sulphur S＜0.035%; A spot of rare earth RE; Surplus is unavoidable impurities and iron Fe.
Producing the process for making that above-mentioned a kind of wear-resistant hammer head adopts is: the processing → casting → quenching → tempering of going bad of alloy melting → stokehold.
The rotten processing in described stokehold adopts stokehold rare earth ferrosilicon and vanadium iron composite inoculating to handle, promptly before the tapping rare earth ferrosilicon alloy and vanadium iron are added in the ladle of baking, inject molten steel, rare earth ferrosilicon alloy and vanadium iron add as compound modifier with 5: 1 ratio, add-on is for handling 0.5～0.8% of molten steel amount, rottenly handles the back molten steel in bag calm 5～10 minutes.
Described casting technique adopts sand mold casting or cavityless casting method to be shaped, and cavityless casting adopts porous plastics to make apperance, uses dry molding, cast molten steel and solidification forming under negative pressure.
Described casting technique adopts the semienclosed gating system of unhurried current, and rotation slag trap and fibrous filter net 2 are set on gating system, strengthens the pushing off the slag effect of gating system.
With low-alloy wear-resistant steel tup austenitizing and in the quenchant of quenching after being incubated for some time 7, the cooling austenitizing temperature is 840～960 ℃ to described quenching heat treatment process using, soaking time 3～8 hours in the high temperature resistance furnace heating.
Described quenching heat treatment process using be local quenching process, behind the abundant austenitizing of tup 5 heating, the working face of tup 5 is quenched in the quenchant 7, tup 5 open holess are partly stayed naturally cooling in the air.
The sodium silicate aqueous solution that described quenchant 7 disposes for water glass, sodium hydroxide and the water of using 400Be ', allocation ratio is 30～45% water glass, 0～5% sodium hydroxide, all the other are water, and the proportion of the quenchant 7 that obtains after the configuration is 1.12～1.30g/cm
3
The tempering temperature of described tempering process is 150～460 ℃.
Compare with existing technology, wear-resistant hammer head of the present invention has good wear resistance and impelling strength, satisfies the service requirements of hammer head of hammer crusher, and described manufacturing process is simple, and production cost is low.
The flat pouring technique front view of description of drawings Fig. 1 sand mold casting of the present invention
The flat pouring technique vertical view of Fig. 2 sand mold casting of the present invention
Fig. 3 sand mold casting upright casting of the present invention artwork
Fig. 4 wear-resistant hammer head quenching of the present invention synoptic diagram
Embodiment further specifies the present invention in order to understand the present invention better below in conjunction with embodiment.
1, the chemical composition design of wear-resistant hammer head
Chemical ingredients is the key factor of decision alloy property, make large-scale low-alloy wear-resistant steel tup and at first must carry out the reasonable component design, must guarantee to have enough hardening capacity, make the tup of thick and large section obtain best structural state and satisfied work-ing life and security, and select for use economical, lower-cost alloying element to carry out alloying according to the resources supplIes of China, obtain best economic benefit.According to the domestic and international pertinent data and the experimental result in early stage, selecting Cr, Mn is main alloying element, auxilliary minor N i, Mo and the Cu of adding.The chemical composition of the wear-resistant hammer head that the present invention is designed and weight percentage thereof are:
Carbon C, 0.20～0.35%; Silicon Si, 0.17～0.37%; Manganese Mn, 1.3～1.6%; Chromium Cr, 1.4～2.5%; Molybdenum Mo, 0.15～0.30%; Nickel, 0.10～0.30%; Copper Cu, 0.0～1.20%; Phosphorus P＜0.035%; Sulphur S＜0.035%; A spot of rare earth RE; Surplus is unavoidable impurities and iron Fe.
Carbon C carbon is the crucial control element of low-alloy wear-resistant steel, and carbon form with interstitial solid solution in low alloy steel exists, and does not wish to occur free state carbon.According to Principles of Metallography and thermal treatment, if carbon content is low excessively in the alloy, martensitic hardness less than acquisition in 0.20% o'clock is lower than HRC48, the too high needle type martensite that will be thick of carbon content in the alloy, will reduce the plasticity and the toughness of alloy significantly, increase the possibility that produces quenching crack, so the present invention determines that carbon content is controlled at 0.20～0.35%.
Silicon Si silicon with the formation of substitutional solid solution exist with alloy in, silicon can improve the hardening capacity of alloy, but effect is poorer than Mn and Cr, and too much silicon is solidly soluted into the plasticity and the toughness that can reduce alloy in the metallic matrix, increase the probability that produces quenching crack, so the present invention determines that its content is 0.17～0.37%.
Manganese Mn manganese is the element that significantly improves alloy hardening capacity, wide material sources, price is lower, therefore in the present invention as one of main alloying element, too high manganese easily produces segregation in alloy graining process, cause inhomogeneous and performance inhomogeneous of alloy structure, therefore, manganese is controlled at 1.3～1.6%.
Chromium Cr chromium is the element that significantly improves alloy hardening capacity, and chromium is low to the energy force rate manganese that hardens of alloy, and chromium segregation coefficient in alloy graining is littler than manganese, is more evenly distributed, and therefore selects chromium as one of main alloying element, and the scope of determining is 1.4～2.5%.
Molybdenum Mo molybdenum is the element that significantly improves alloy hardening capacity, and molybdenum can also improve the hot hardness of alloy, but molybdenum price height reduces its consumption as far as possible under the condition that guarantees the hardening capacity that acquisition is enough, and the present invention selects the content of molybdenum to be: 0.15～0.30%.
Nickel nickel does not form carbide in steel, can improve the hardening capacity and the oxidation-resistance of alloy, its effect that improves hardening capacity is lower than manganese, chromium, molybdenum, and the price height of nickel, reduce the consumption of nickel on the basis that performance meets the demands, the present invention determines that the content of nickel is: 0.10～0.30% as far as possible.
Copper Cu copper exists with the sosoloid form in steel, copper can improve the hardening capacity of steel alloy, and copper and molybdenum associating result of use are better, and the price of copper is lower than molybdenum and nickel, adjust the add-on of copper among the present invention according to the tup of different thickness, the span of control of copper is: 0.0～1.20%.
Phosphorus P and sulphur S p and s all are harmful elements, should reduce their content in alloy as far as possible, control its content＜0.035%.
Vanadium V vanadium is the strong carbide forming element, the fusing point height of the carbide that generates, before molten steel solidification, form dystectic carbide, and the ferritic lattice parameter of its lattice parameter and high temperature is close, can be used as the interior living nucleus that low alloy steel solidifies, can crystal grain thinning, form compound modifier with rare earth element and when coming out of the stove, add in the ladle.Add-on is for handling 0.01～0.15% of molten steel weight.
Rare earth RE rare earth has good deoxidation, desulfidation, cleaning molten steel significantly, the solidified structure of refinement low alloy steel, change the shape and the distribution of non-metallic inclusion, significantly improve the plasticity and the toughness of steel, middle-weight rare earths of the present invention and vanadium are formed compound modifier, and the add-on of rare earth is for handling 0.2～0.5% of molten steel weight.
An important factor should considering during alloy designs is a hardening capacity, carry out the Theoretical Calculation of hardening capacity according to the Grossman method: according to the carbon content of alloy and the content of alloying element, calculate desirable critical size DI, again according to the cooling intensity H of quenchant, converse actual critical size D, be illustrated under this condition and quench, diameter is that the center of the bar of D can obtain 50% martensite.According to the chemical ingredients scope of above-mentioned design, get intermediate value, calculate the hardening factor of various elements, as shown in table 1:
The composition range of table 1 low alloy steel and the hardening factor of each alloying element
| Element | ??C，％ | ????Si，％ | ????Mn，％ | ??Cr，％ | ??Mo，％ | ??Ni，％ | ???Cu，％ |
| Composition range | ??0.20～0.35 | ????0.17～0.37 | ????1.3～1.6 | ??1.4～2.5 | ??0.15～0.30 | ??0.10～0.30 | ???0.0～1.20 |
| Intermediate value | ??0.275 | ????0.27 | ????1.45 | ??1.95 | ??0.225 | ??0.2 | ???0.6 |
| Hardening factor | ??0.252 * | ????1.28 | ????3.8 | ??5.3 | ??1.9 | ??1.1 | ???1.1 |
*When calculating the hardening factor of C, getting grain fineness number is No.6
Draw desirable critical size DI according to the data in the table 1
D
I15 inches of=0.252 * 1.28 * 3.8 * 5.3 * 1.9 * 1.1 * 1.1=14.94 inch ≈.
Under agitation condition, the cooling intensity H of water intaking glass is 0.5, and water is 1.0～1.1, and oil is 0.3～0.35, finds actual critical size to be:
337 millimeters of 13.3 inches ≈ of D ≈.
Under agitation condition, cool off in the air, its cooling intensity H is 0.05, finds actual critical size to be:
146 millimeters of 5.8 inches ≈ of D ≈
Be mentioned component under the cooling conditions of water glass, diameter is that the heart portion of 337 millimeters pole can obtain 50% martensite, cools off in the violent stirring air, diameter is that the heart portion of 146 millimeters pole can obtain 50% martensite.The alloy that design is described has good hardening capacity.
2, production technique
Producing the process for making that wear-resistant hammer head of the present invention adopts is: the processing → casting → quenching → tempering of going bad of alloy melting → stokehold.
The first step alloy melting.Can adopt induction furnace or arc melting, the starting material of molten alloy have steel scrap, the pig iron, low carbon ferrochromium, ferromanganese or manganese metal, molybdenum-iron, electrolytic nickel, electrolytic copper or useless red copper, vanadium iron powder and rare earth alloy; Adopt basic lining, add the steel scrap and the pig iron during melting earlier, add ferrochrome, ferromanganese, molybdenum-iron, electrolytic nickel and electrolytic copper or useless red copper again, clear back sampling fusion, the content of chemical examination C, Mn, Cr; And add alloy according to result of laboratory test, and promoting temperature, additional proportion is that 3: 1 lime and fluorite made new slag, when the composition and the temperature scope of meeting the requirements of of molten steel are come out of the stove, the slotting aluminium deoxidation of skimming, inserting the aluminium amount is 0.1% of molten steel weight.
The rotten processing in the second step stokehold.The rotten purpose of handling is crystal grain thinning and purifies alloy, rotten handle adopt rare earth ferrosilicon alloy and vanadium iron with 5: 1 ratio as compound modifier, the method that adopts the hot metal ladle mesometamorphism to handle, with the casting ladle baking, the casting ladle temperature reaches 700～900 ℃ before coming out of the stove; Compound modifier is added the bag end, and add-on is for handling 0.5～0.8% of iron water amount;
The casting of the 3rd step.Can adopt two kinds of castmethods to be shaped: sand mold casting and cavityless casting.
A) sand mold casting: resin bonded sand mould, sodium silicate sand or clay-bonded sand moulding, with flat method of watering, the big plane parallel that is tup 5 is in horizontal plane, adopt the semienclosed gating system of unhurried current, sprue 1, the ratio of the cross-sectional area of cross gate 6 and ingate 3 constituent elements is: A is straight: in A horizontal stroke: the A=1.1～1.3: 1.5～1.7: 1.0, wherein A is straight, in A horizontal stroke and the A is respectively sprue 1, the sectional area of cross gate 6 and ingate 3, on cross gate 6, lay refractory fibre filtering net 2, cross gate 6 is divided into two portions, be separately positioned on nowel, both have a faying surface, place filtering net 2 at this faying surface place, the faying surface area is 3～5 times of cross gate 6 sectional areas, strengthens the pushing off the slag ability of cross gate 6, rising head 4 is placed in hammer position, the big plane of body, and rising head 4 moduluses are 1.5～2.0 of casting modulus;
B) cavityless casting: adopt porous plastics to make apperance, use dry molding, cast molten steel and solidification forming under negative pressure, to guarantee sufficiently high dimensional precision and lower surfaceness, adopt the method for upright casting, the big plane that is tup 5 is perpendicular to horizontal plane, rising head 4 is placed in hammer body end face position, rising head 4 moduluses are 1.3～1.8 of casting modulus, adopt the staged ingate, molten steel is introduced the foundry goods die cavity from following ingate, introduces rising head by another ingate again after being full of the foundry goods die cavity, obtains feeding temperature field preferably.
The 4th step quenched.Place chamber type electric resistance furnace to heat the tup 5 of cast form, slowly heat up, heat-up rate is 10～30 ℃/hour; Insulation is 1 hour when being warming up to 650 ℃; Be rapidly heated then, heat-up rate is 100～300 ℃/hour, the insulation quenching of coming out of the stove after 3～8 hours when being warming up to 840～960 ℃ of austenitizing temperatures, the sodium silicate aqueous solution that water glass, sodium hydroxide and the water use 400Be ' of quenching disposes is as quenchant 7, allocation ratio is: 30～45% water glass, 0～5% sodium hydroxide, all the other are water, the proportion of the quenchant 7 of configuration is: 1.12～1.30g/cm
3, its cooling intensity is between water and oil.
Adopt two kinds of quenching method, integral quenching and selective hardenings.
A) integral quenching: in whole tup 5 dip quench media 7.
B) selective hardening: will hammer into shape in the body position dip quench medium 7, aerial air cooling is stayed at the open holes position, occurs to prevent that this place's speed of cooling is too fast too much martensite occurring in quenching crack and the tissue and hardness is higher.
The 5th step tempering.Carry out temper in 0～8 hour after wear-resistant hammer head quenches, adopt the resistance furnace heating, heat-up rate is 10～30/ hours, and tempering temperature is 150～460 ℃, after being incubated 6～8 hours under this temperature, and the air cooling of coming out of the stove.
Embodiment 1
Finished product tup thickness 120mm, single weight 200kg, the composition of finished product tup is: C:0.30%; Si:0.27%; Mn:1.37%; Cr:2.50%; Mo:0.18%; Ni:0.12%; Cu:0.88%; P:0.022%; S:0.012%, V and RE do not survey.Adopt 750 kilograms of medium-frequency induction furnace meltings, steel scrap, the pig iron, low carbon ferrochromium, manganese metal, molybdenum-iron, electrolytic nickel, useless red copper are added fusing adjustment composition in the induction furnace, heat up, the cast of coming out of the stove, the processing of in ladle, going bad, add the compound modifier that rare earth ferrosilicon and vanadium iron powder are formed, for handling 0.8% of molten steel.Adopt cavityless casting, the upright casting method, feeder modulus 55, the modulus of tup are 37.9.Quenching technology, 920 ℃ of austenitizing temperatures are incubated 5 hours, integral quenching, quenchant is a sodium silicate aqueous solution, its proportion is: 1.28, tempering temperature is 160 ℃, is incubated 6 hours.Use the molybdenum filament wire cutting method, it is as follows to survey its performance from tup limit portion and center intercepting sample: limit portion: impelling strength 55J/cm
2, hardness HRC:55.0,56.1,55.8; Center: impelling strength 51J/cm
2, hardness HRC:57.3,56.4,58.6, organizing of edge and center all is the mixed structure of martensite and bainite.
Embodiment 2
Finished product tup thickness 120mm, single weight 200kg, the composition of finished product tup is: C:0.25%; Si:0.25%; Mn:1.60%; Cr:1.83%; Mo:0.25%; Ni:0.26%; Cu:1.16%; P:0.014%; S:0.009%, V and RE do not survey.Adopt 750 kilograms of medium-frequency induction furnace meltings, steel scrap, the pig iron, low carbon ferrochromium, manganese metal, molybdenum-iron, electrolytic nickel, useless red copper are added fusing adjustment composition in the induction furnace, heat up, the cast of coming out of the stove, the processing of in ladle, going bad, add the compound modifier that rare earth ferrosilicon and vanadium iron powder are formed, for handling 0.5% of molten steel.The casting of employing resin bonded sand mould is put down and is watered method, and feeder modulus 60, the modulus of tup are 37.9.Quenching technology, 960 ℃ of austenitizing temperatures are incubated 5 hours, integral quenching, quenchant is a sodium silicate aqueous solution, its proportion is: 1.16, tempering temperature is 420 ℃, is incubated 6 hours.Use the molybdenum filament wire cutting method, it is as follows to survey its performance from tup limit portion and center intercepting sample: limit portion: impelling strength 85J/cm
2, hardness HRC:49.3,50.5,48.6; Center: impelling strength 73J/cm
2, hardness HRC:50.2,51.2,49.7, organizing of edge and center all is the mixed structure of martensite and bainite.
Embodiment 3
Finished product tup thickness 120mm, single weight 200kg, the composition of finished product tup is: C:0.35%; Si:0.35%; Mn:1.43%; Cr:2.42%; Mo:0.29%; Ni:0.12%; Cu:0.94%; P:0.022%; S:0.012%, V and RE do not survey.Adopt 750 kilograms of medium-frequency induction furnace meltings, steel scrap, the pig iron, low carbon ferrochromium, manganese metal, molybdenum-iron, electrolytic nickel, useless red copper are added fusing adjustment composition in the induction furnace, heat up, the cast of coming out of the stove, the processing of in ladle, going bad, add the compound modifier that rare earth ferrosilicon and vanadium iron powder are formed, for handling 0.8% of molten steel.Adopt cavityless casting, the upright casting method, feeder modulus 55, the modulus of tup are 37.9.Quenching technology, 940 ℃ of austenitizing temperatures are incubated 5 hours, and selective hardening will be hammered into shape in the dip quench liquid of body position, and aerial air cooling is stayed at the open holes position, and quenchant is a sodium silicate aqueous solution, its proportion is: 1.12, tempering temperature is 320 ℃, is incubated 6 hours.Use the molybdenum filament wire cutting method, from the limit portion and the center intercepting sample of tup hammer body, it is as follows to survey its performance: limit portion: impelling strength 63J/cm
2, hardness HRC:53.7,52.5,53.8; Center: impelling strength 58J/cm
2, hardness HRC:54.4,53.9,54.1, organizing of edge and center all is the mixed structure of martensite and bainite, from tup position of mounting hole intercepting sample, it is as follows to measure its performance: impelling strength 55J/cm
2, hardness HRC:52.1,51.9,51.3, metallographic structure is martensite and bainite mixed structure.
Claims (9)
1, a kind of wear-resistant hammer head is characterized in that the chemical composition of this wear-resistant hammer head and weight percentage thereof are: carbon C, 0.20～0.35%; Silicon Si, 0.17～0.37%; Manganese Mn, 1.3～1.6%; Chromium Cr, 1.4～2.5%; Molybdenum Mo, 0.15～0.30%; Nickel, 0.10～0.30%; Copper Cu, 0.0～1.20%; Phosphorus P＜0.035%; Sulphur S＜0.035%; A spot of rare earth RE; Surplus is unavoidable impurities and iron Fe.
2, the manufacturing process of wear-resistant hammer head as claimed in claim 1 is characterized in that: making the technological process that described wear-resistant hammer head adopts is, the processing → casting → quenching → tempering of going bad of alloy melting → stokehold.
3, the manufacturing process of wear-resistant hammer head as claimed in claim 2, it is characterized in that: the rotten processing in described stokehold adopts stokehold rare earth ferrosilicon and vanadium iron composite inoculating to handle, promptly before the tapping rare earth ferrosilicon alloy and vanadium iron are added in the ladle of baking, inject molten steel, rare earth ferrosilicon alloy and vanadium iron add as compound modifier with 5: 1 ratio, add-on is for handling 0.5～0.8% of molten steel amount, rottenly handles the back molten steel in bag calm 5～10 minutes.
4, the manufacturing process of wear-resistant hammer head as claimed in claim 2, it is characterized in that: described casting technique adopts sand mold casting or cavityless casting method to be shaped, cavityless casting adopts porous plastics to make apperance, uses dry molding, cast molten steel and solidification forming under negative pressure.
5, the manufacturing process of wear-resistant hammer head as claimed in claim 4, it is characterized in that: described casting technique adopts the semienclosed gating system of unhurried current, and rotation slag trap and fibrous filter net (2) are set on gating system, strengthen the pushing off the slag effect of gating system.
6, the manufacturing process of wear-resistant hammer head as claimed in claim 2, it is characterized in that: described quenching heat treatment process using heats with low-alloy wear-resistant steel tup austenitizing and in the quenchant of quenching after being incubated for some time (7) at high temperature resistance furnace, the cooling austenitizing temperature is 840～960 ℃, soaking time 3～8 hours.
7, as the manufacturing process of claim 2 or 6 described wear-resistant hammer heads, it is characterized in that: described quenching heat treatment process using be local quenching process, behind the abundant austenitizing of tup (5) heating, the working face of tup (5) is quenched in the quenchant (7), and tup (5) open holes is partly stayed naturally cooling in the air.
8, the manufacturing process of wear-resistant hammer head as claimed in claim 7, it is characterized in that: the sodium silicate aqueous solution that described quenchant (7) disposes for water glass, sodium hydroxide and the water of using 400Be ', allocation ratio is, 30～45% water glass, 0～5% sodium hydroxide, all the other are water, and the proportion of the quenchant that obtains after the configuration (7) is 1.12～1.30g/cm
3
9, the manufacturing process of wear-resistant hammer head as claimed in claim 2 is characterized in that: the tempering temperature of described tempering process is 150～460 ℃.
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