CN102310014B

CN102310014B - High performance composite metal hammer

Info

Publication number: CN102310014B
Application number: CN201110240477.3A
Authority: CN
Inventors: 赵金斌
Original assignee: NINGGUO DONGFANG WEAR-RESISTANT MATERIALS CO LTD
Current assignee: Ningguo Dongfang Milling Material Co ltd
Priority date: 2011-08-22
Filing date: 2011-08-22
Publication date: 2015-09-16
Anticipated expiration: 2031-08-22
Also published as: CN102310014A

Abstract

The present invention relates to high performance composite metal hammer, comprise tup and hammer handle, described hammer handle material is 40Mn2 low-alloy steel, tup material is high-chromium alloy cast-iron, hammer handle and tup are netted in conjunction with the surface texture of shank, tup hardness HRC >=58, impact flexibility ak >=3Jcm2, hammer handle hardness HBW:187 ~ 255, impact flexibility ak >=40Jcm2, wear-resistant hammer head provided by the invention had both made the strike position of tup have high rigidity and certain toughness, meet the anti-wear performance requirement of tup, hammer handle is made again to have high tenacity and certain hardness, ensure the safety in utilization of tup.

Description

High performance composite metal hammer

Technical field

The present invention relates to the production technical field of the wear-resistant hammer head on large-scale hammer mill, particularly relate to a kind of high performance composite metal hammer.

Background technology

Tup is the critical component of large-scale hammer mill, be widely used in the broken industries such as cement, mine, traffic, building materials, power plant, metallurgy, it is a kind of consumable accessory, the metal material of the annual at substantial because of wearing and tearing, the anti-wear performance of grinder hammerhead and safety in utilization thereof evaluate the important indicator of tup serviceability.Along with the development of crushing mechanism industry, increasing problem goes out one after another, and expansion, disintegrating apparatus maximization etc. as broken field are proposed higher requirement to the material of wear-resistant hammer head and preparation technology thereof.For heavy hammer, how to design a kind of tup, both the strike position of tup had been made to have high rigidity and certain toughness, the anti-wear performance meeting tup requires, make again the installation position of tup have high tenacity and certain hardness, ensureing the safety in utilization of tup, is problem to be solved by this invention.

Summary of the invention

The present invention, in order to overcome the deficiency of above technology, provides a kind of under high and low impact condition, the high performance composite metal hammer that anti-wear performance and safety in utilization are all excellent.

Technical scheme of the present invention is: high performance composite metal hammer, comprise tup and hammer handle, described hammer handle material is 40Mn2 low-alloy steel, tup material is high-chromium alloy cast-iron, hammer handle and tup are netted in conjunction with the surface texture of shank, tup hardness HRC >=58, impact flexibility ak >=3Jcm2, hammer handle hardness HBW:187-255, impact flexibility ak >=40Jcm2;

The percentage by weight chemical composition of described tup is: C:2.6 ~ 3.1%, Si:0.4 ~ 0.7%, Cr:18 ~ 22%, Mn:1.0 ~ 1.6%, Mo:1.2 ~ 1.4%, Ni:1.2 ~ 1.4%, S≤0.03%, P≤0.035%, and surplus is Fe;

The percentage by weight chemical composition of described hammer handle is: C:0.35 ~ 0.45%, Si:0.2 ~ 0.4%, Mn:1.6 ~ 1.8%, and surplus is Fe.

The step of preparation process of described tup is:

The preparation technology of described hammer handle: through batching, smelts, and after cast depanning, first carries out stress relief annealing, polishes after annealing, hammer handle and tup binding site must smooth, must not casting skin be had, before tup castingin, put 200 DEG C of heating in heat-treatment furnace, for subsequent use;

The preparation technology of described tup is: through batching, 1500 DEG C of smelting, 1408 ~ 1380 DEG C carry out pouring into a mould at above-mentioned hammer handle and tup binding site, be incubated 8 hours after depanning cool, polish, heating and thermal insulation, wind quenched, tempering, cooling acquisition goods;

Described heating and thermal insulation step takes four sections of warm area heating, is incubated after every section of warm area heating, is finally warmed up to hardening heat 920 DEG C and carries out quenching preparation;

Described quenching Step is come out of the stove after hardening heat 920 DEG C of constant temperature have kept by semi-finished product, and after cold wind quenching, temperature is down to 100 ± 5 DEG C and is carried out tempering preparation;

Described tempering step be by quenching after semi-finished product be heated to temperature 250 ± 5 DEG C, Slow cooling after constant temperature has kept, its constant temperature maintenance time be 4 hours.

Described heating and thermal insulation step comprises following operation:

1) semi-finished product are filled basket, be fed into heat-treatment furnace;

2) be heated to 450 DEG C → constant temperature and keep 120 minutes;

3) be heated to 650 DEG C → secondary constant temperature and keep 120 minutes;

4) be heated to 800 DEG C → tri-times constant temperature and keep 120 minutes;

5) be heated to 920 DEG C → tetra-times constant temperature and keep 120 minutes.

The beneficial effect that the present invention has: the anufacturability fully taking into account tup during Design of Chemical Composition due to tup, the factor such as application conditions and adaptability, by the chemical composition of appropriate design tup and the network structure on heat stepwise insulation and hammer handle and surface, tup joint portion, the surface contact portion of hammer handle and tup is made to ooze occlusion mutually, strong bonded, tup hardness HRC >=58 obtained, impact flexibility ak >=3Jcm2, hammer handle hardness HBW:187-255, impact flexibility ak >=40Jcm2, the strike position meeting heavy hammer has high rigidity and certain toughness, ensure its high-wearing feature, hammer handle has high tenacity and certain hardness simultaneously, to installation position, there is transition connection portion position from strike position, tup each position performance is changed in gradient, thus ensure not occur phenomenon of rupture in use procedure, ensure the safety in utilization of tup, and increase substantially its service life.。

Accompanying drawing explanation

Fig. 1 is high performance composite metal hammer Technology for Heating Processing flow chart of the present invention.

Detailed description of the invention

For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to the detailed description of the invention of high performance composite metal hammer proposed according to the present invention, method, step, feature and effect thereof, be described in detail as follows:

Embodiment 1:

The first step: alloying component is by weight percentage: C:0.35%, Si:0.4%, Mn:1.6%, surplus is Fe; Through batching → in the sand casting chamber that 1500 DEG C are cast to required hammer handle shape cooling forming, after annealing hammer handle shake out 100 DEG C time polishing (hammer handle and tup binding site must smooth, must not casting skin be had) → put in heat-treatment furnace 200 DEG C heat, for subsequent use;

Second step: chemical composition is by weight percentage: C:2.6%, Si:0.7%, Cr:18%, Mn:1.6%, Mo:1.2%, Ni:1.4%, S:0.03%, P:0.03%, surplus is Fe; Through batching → 1500 DEG C smelt → 1408 ~ 1380 DEG C carry out pouring into a mould at above-mentioned hammer handle and tup binding site, be incubated 8 hours after depanning cool → polish → be warming up to 450 DEG C, be incubated 120 minutes → 650 DEG C, be incubated 120 minutes → 800 DEG C, be incubated 120 minutes → 920 DEG C, be incubated 120 minutes → wind and quench to 105 DEG C → 250 DEG C tempering → naturally cool to less than 100 DEG C to obtain final tup product, tup hardness HRC=60, impact flexibility ak=3Jcm2, hammer handle hardness HBW:=250, impact flexibility ak=45Jcm2.

Embodiment 2:

The first step: alloying component is by weight percentage: C:0.4%, Si:0.3%, Mn:1.7%, surplus is Fe; Through batching → in the sand casting chamber that 1500 DEG C are cast to required hammer handle shape cooling forming, after annealing hammer handle shake out 100 DEG C time polishing (hammer handle and tup binding site must smooth, must not casting skin be had) → put in heat-treatment furnace 200 DEG C heat, for subsequent use;

Second step: chemical composition is by weight percentage: C:2.8%, Si:0.4%, Cr:20%, Mn:1.4%, Mo:1.3%, Ni:1.3%, S:0.02%, P:0.025%, surplus is Fe; Through batching → 1500 DEG C smelt → 1408 ~ 1380 DEG C carry out pouring into a mould at above-mentioned hammer handle and tup binding site, be incubated 8 hours after depanning cool → polish → be warming up to 450 DEG C, be incubated 120 minutes → 650 DEG C, be incubated 120 minutes → 800 DEG C, be incubated 120 minutes → 920 DEG C, be incubated 120 minutes → wind and quench to 98 DEG C → 248 DEG C tempering → naturally cool to less than 100 DEG C to obtain final tup product, tup hardness HRC=59, impact flexibility ak=4Jcm2, hammer handle hardness HBW=200, impact flexibility ak=41Jcm2.

Embodiment 3:

The first step: alloying component is by weight percentage: C:0.45%, Si:0.2%, Mn:1.8%, surplus is Fe; Through batching → in the sand casting chamber that 1500 DEG C are cast to required hammer handle shape cooling forming, after annealing hammer handle shake out 100 DEG C time polishing (hammer handle and tup binding site must smooth, must not casting skin be had) → put in heat-treatment furnace 200 DEG C heat, for subsequent use;

Second step: chemical composition is by weight percentage: C:3.1%, Si:0.6%, Cr:22%, Mn:1.0%, Mo:1.4%, Ni:1.2%, S:0.01%, P:0.035%, surplus is Fe; Through batching → 1500 DEG C smelt → 1408 ~ 1380 DEG C carry out pouring into a mould at above-mentioned hammer handle and tup binding site, be incubated 8 hours after depanning cool → polish → be warming up to 450 DEG C, be incubated 120 minutes → 650 DEG C, be incubated 120 minutes → 800 DEG C, be incubated 120 minutes → 920 DEG C, be incubated 120 minutes → wind and quench to 102 DEG C → 251 DEG C tempering → naturally cool to less than 100 DEG C to obtain final tup product, tup hardness HRC=58, impact flexibility ak=5Jcm2, hammer handle hardness HBW=189, impact flexibility ak=40Jcm2.

The above, be only the specific embodiment of the present invention.Protection scope of the present invention is not limited thereto, and is anyly familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should define with claim is as the criterion.

Claims

1. high performance composite metal hammer, comprise tup and hammer handle, it is characterized in that: described hammer handle material is 40Mn2 low-alloy steel, tup material is high-chromium alloy cast-iron, hammer handle and tup are netted in conjunction with the surface texture of shank, tup hardness HRC >=58, impact flexibility ak >=3Jcm2, hammer handle hardness HBW:187-255, impact flexibility ak >=40Jcm2;

2. high performance composite metal hammer according to claim 1, is characterized in that: the step of preparation process of described high performance composite metal hammer is:

The preparation technology of described hammer handle: through batching, smelts, and after cast depanning, first carries out stress relief annealing, polishes after annealing, before tup castingin, put 200 DEG C of heating in heat-treatment furnace, for subsequent use;

3. high performance composite metal hammer according to claim 2, is characterized in that: described heating and thermal insulation step comprises following operation:

1) semi-finished product are filled basket, be fed into heat-treatment furnace;

2) be heated to 450 DEG C → constant temperature and keep 120 minutes;