Grinding table_Vertical Mill Liner

The vertical mill liner is divided into concave, flat plate and bowl type, which correspond to the tire type, taper and cylinder type of the grinding roller respectively. Commonly found in the market are concave and flat table.

At present, in order to extend the life cycle and reduce costs, welding rods made of wear-resistant materials are often used for surfacing on the surface of the grinding table. Achieve the effect of multiple use of a single table. Surfacing layer can adapt to a variety of working conditions, avoiding the need to replace the entire table due to changes in working conditions.

High chromium iron

Feature:

We use proper alloying and and related technological measures to make the blow bars’ surface hardness reaches more than 58HRC , during the process of wearing will maintain high hardness and high wear resistance.

Technology process

In blow bars’ working part we use the technique of directional solidification to make Cr7C3 type carbide is perpendicular to the part.The macro-hardness and micro hardness of carbide can be improved without reducing thoghness.

Application

Suitable for making wearable spare parts with lower impact load and simpler shape.

Chemical component

Grade	Chemical component%
Grade	C	Si	Mn	Cr	Mo	Ni	Cu	S	P
BTMCr15	2.0~3.3	≤1.2	≤2.0	14~18	≤3.0	≤2.5	≤1.2	≤0.06	≤0.10
BTMCr20	2.0~3.3	≤1.2	≤2.0	18~23	≤3.0	≤2.5	≤1.2	≤0.06	≤0.10
BTMCr26	2.0~3.3	≤1.2	≤2.0	23~30	≤3.0	≤2.5	≤2.0	≤0.06	≤0.10
1：Allowed to add microscale V,Ti,Nb,B and Re etc. 2：We will choose grade and specific component according to blow bars’ weight ,thickness and sizes

Mechanical Property

Grade	Surface Hardness
	Casting condition		Harded condition		Softening annealing condition
	HRC	HB	HRC	HB	HRC	HB
BTMCr15	≥46	≥450	≥58	≥650	≥41	400
BTMCr20	≥46	≥450	≥58	≥650	≥41	400
BTMCr26	≥46	≥450	≥58	≥650	≥41	400
1：There are no exact corresponing value between rockwell hardness(HRC) and brine hardness(HB),so ,this two kind of hardness value can be inspend used 。 2：The hardness in the 40%deepness of casting section should be lower than 92% hardness of surface.

High manganese steel

Feature

High manganese steel refers to high alloy steels containing more than 10% manganese. The biggest features of high-manganese steel are:

The greater external compressive stress or impact load, the more conducive to the formation of hardened layer, so the higher the wear resistance of the casting;

With the gradual wear of the hardened layer, new work hardened layers will continue to form under the influence of external compressive stress or impact loads. Therefore, it is suitable for making wearable spare parts that are subject to high impact load and wear for a long time, and is widely used in metallurgy, mining, building materials, railways, electric power, coal and other broken grinding equipment.

Chemical component

Grade	Chemical component%
Grade	C	Si	Mn	Cr	S	P
ZG120Mn13	1.05~1.35	0.3~0.9	11~14	-	≤0.06	≤0.04
ZG120Mn13Cr2	1.05~1.35	0.3~0.9	11~14	1.5~2.5	≤0.06	≤0.04
ZG120Mn17Cr2	1.05~1.35	0.3~0.9	16~19	1.5~2.5	≤0.06	≤0.04
1：Allowed to add microscale V,Ti,Nb,B and Re etc. 2：We will choose grade and specific component according to blow bars’ weight ,thickness and sizes

Mechanical Property

Grade	Stretch property				Hardness HB
Grade	yield strength ReH/Mpa	tensile strength Rm/Mpa	Elongation at cross section%	Shock absorption energyKu2J	Hardness HB
ZG120Mn13	-	≥685	≥25	≥118	≤300
ZG120Mn13Cr2	≥390	≥735	≥20	-	≤300

Medium alloy steel

Feature

The alloy structure cast steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloy elements on the basis of ordinary carbon steel.

Process technology

According to the different elements added, with appropriate smelting and heat treatment process to obtain high strength, high toughness, high wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, non-magnetic and other related special properties.

Scope of application

It is suitable for producing the wear-resisting spare parts with good mechanical strength and good toughness that are required for various working conditions, and the main steel structure castings with the required dynamic load.

Chemical component

Grade	Chemical component%
Grade	C	Si	Mn	Cr	Mo	S	P	Ai
ZG42CrMo	0.38-0.43	0.15-0.35	0.75-1.00	0.80-1.10	0.15-0.25	< 0.04	< 0.035	-
ZG35CrMo	0.32~0.40	0.17~0.37	0.40~0.70	0.80~1.10	0.15~0.25	≤0.035	≤0.035	-
ZG38CrMoAl	0.35~0.42	0.20~0.45	0.30~0.60	1.35~1.65	0.15~0.25	≤0.04	≤0.04	0.7~1.1
ZG40Cr	0.37~0.45	0.17~0.37	0.5~0.8	0.8~1.1	-	-	-	-
ZG30Mn2SiCrMo	0.25~0.35	0.40~0.80	1.20~1.60	1.35~1.65	0.2~0.5	≤0.04	≤0.04	-

Mechanical Property

Grade	tensile strength（Mpa）	yield strength （Mpa）	Elongation at cross section（%）	reduction of crosssection area（%）	Shock absorption energy（KV₂/J）
ZG42CrMo	≥1080	≥930	≥12	≥20	≥24
ZG35CrMo	≥985	≥835	≥12	≥20	≥24
ZG38CrMoAl	≥980	≥835	≥14	≥20	≥24
ZG40Cr	≥980	≥785	≥9	≥20	≥24
ZG30Mn2SiCrMo	≥1500	≥1300	≥3	-	≥24

High chromium iron

Feature:

Technology process

Application

Suitable for making wearable spare parts with lower impact load and simpler shape.

Chemical component

Grade	Chemical component%
Grade	C	Si	Mn	Cr	Mo	Ni	Cu	S	P
BTMCr15	2.0~3.3	≤1.2	≤2.0	14~18	≤3.0	≤2.5	≤1.2	≤0.06	≤0.10
BTMCr20	2.0~3.3	≤1.2	≤2.0	18~23	≤3.0	≤2.5	≤1.2	≤0.06	≤0.10
BTMCr26	2.0~3.3	≤1.2	≤2.0	23~30	≤3.0	≤2.5	≤2.0	≤0.06	≤0.10
1：Allowed to add microscale V,Ti,Nb,B and Re etc. 2：We will choose grade and specific component according to blow bars’ weight ,thickness and sizes

Mechanical Property

牌号 Grade	表面硬度 Surface Hardness
	铸态或铸态去应力 Casting condition		硬化态或硬化态去应力处理 Harded condition		软化退火态 Softening annealing condition
	HRC	HB	HRC	HB	HRC	HB
BTMCr15	≥46	≥450	≥58	≥650	≥41	400
BTMCr20	≥46	≥450	≥58	≥650	≥41	400
BTMCr26	≥46	≥450	≥58	≥650	≥41	400
1：There are no exact corresponing value between rockwell hardness(HRC) and brine hardness(HB),so ,this two kind of hardness value can be inspend used 。 2：The hardness in the 40%deepness of casting section should be lower than 92% hardness of surface.

Medium alloy steel

Feature

The alloy structure cast steel is an iron-carbon alloy formed by adding an appropriate amount of one or more alloy elements on the basis of ordinary carbon steel.

Process technology

Scope of application

Chemical component

Grade	Chemical component %
Grade	C	Si	Mn	Cr	Mo	S	P	Ai
ZG42CrMo	0.38-0.43	0.15-0.35	0.75-1.00	0.80-1.10	0.15-0.25	<0.04	<0.035	-
ZG35CrMo	0.32~0.40	0.17~0.37	0.40~0.70	0.80~1.10	0.15~0.25	≤0.035	≤0.035	-
ZG38CrMoAl	0.35~0.42	0.20~0.45	0.30~0.60	1.35~1.65	0.15~0.25	≤0.04	≤0.04	0.7~1.1
ZG40Cr	0.37~0.45	0.17~0.37	0.5~0.8	0.8~1.1	-	-	-	-
ZG30Mn2SiCrMo	0.25~0.35	0.40~0.80	1.20~1.60	1.35~1.65	0.2~0.5	≤0.04	≤0.04	-

Mechanical Property

Grade	tensile strength（Mpa）	yield strength （Mpa）	Elongation at cross section（%）	reduction of crosssection area（%）	Shock absorption energy（KV₂/J）
ZG42CrMo	≥1080	≥930	≥12	≥20	≥24
ZG35CrMo	≥985	≥835	≥12	≥20	≥24
ZG38CrMoAl	≥980	≥835	≥14	≥20	≥24
ZG40Cr	≥980	≥785	≥9	≥20	≥24
ZG30Mn2SiCrMo	≥1500	≥1300	≥3	-	≥24

Grinding table/Vertical Mill Liner

High chromium iron

High manganese steel

Medium alloy steel

High chromium iron

Medium alloy steel

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