Changzhou Ruihong Roll co.,ltd

Alloy chilled cast iron roll in the matrix of working layer basically no free graphite, its high hardness,good wear - resistance, microstructure is fine pearlite and carbides.

Centrifugal Casting Alloy Indefinite Chill Cast Iron Roll

Changzhou RH mill roll is a high-tech enterprise focusing on the designing and manufacturing of precision components.We have established a long term relationship with the world top 500

enterprises:Bombardier, Danieli, Siemens etc.

Properties

The shell has a remarkable mechanical performance. With virtually no fall of in hardness due to the quantity of graphite remains basically unchanged throughout the working layer. The hardness of roll depends mainly on the type of matrix, namely sorbite, bainite or martensite.

Mechanical Properties
Hardness of shell	HSD60-85
Hardness of neck	HSD35-48
Tensile Strength of core	≥450Mpa

Chemical Analysis

Grade	Hardness(HSD)	C	Si	Mn	Ni	Cr	Mo
Indefinite-I	60-70	3.0/3.5	0.5/1.0	0.5/1.0	0.5/1.0	0.5/1.0	0.2/0.6
Indefinite-II	62-72	3.0/3.5	0.5/1.0	0.5/1.0	1.0/2.0	0.5/1.0	0.2/0.6
Indefinite-III	65-75	3.0/3.5	0.5/1.0	0.5/1.0	2.0/3.0	0.7/1.2	0.2/0.6
Indefinite-IV	70-85	3.0/3.5	0.5/1.0	0.5/1.0	3.0/5.0	1.0/2.0	0.2/0.6

Applications

For the finishing stands of continuous rolling mill of strip and bar, the pre-finishing stands of high speed wire,

the intermediate and the front of finishing stands of small section, also utilized in thin plate and straightening roll.

1、化学成份

轧辊名称	代码	C	Si	Mn	P	S	Ni	Cr	Mo
铬钼冷硬	CC	2.90-3.60	0.25-0.80	0.20-1.00	≤0.40	≤0.08		0.20-0.60	0.20-0.60
镍铬钼冷硬Ⅰ	CCⅠ	2.90-3.60	0.25-0.80	0.20-1.00	≤0.40	≤0.08	0.50-1.00	0.20-0.60	0.20-0.60
镍铬钼冷硬Ⅱ	CCⅡ	2.90-3.60	0.25-0.80	0.20-1.00	≤0.40	≤0.08	1.01-2.00	0.30-1.20	0.20-0.60

2、物理性能

代码	辊身硬度（HSD）	辊颈硬度（HSD）	抗拉强度（MPa）	白口深度（mm）
代码	辊身硬度（HSD）	辊颈硬度（HSD）	抗拉强度（MPa）	ø≤250	ø251-300	ø﹥300
CC	58—70	32—48	≥150	15--30	17--35	20--45
CCⅠ	60—70	32—50	≥150	15--30	17--35	20--45
CCⅡ	62--75	35--52	≥150	15--30	17--35	20--45

3、应用范围

小型型钢、线材、热轧薄板平整轧机